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Stamping Die Clearance Guide: Burrs, Cut Edge Quality, Punch Life and Troubleshooting
Stamping die clearance is the controlled gap between a punch and the corresponding die opening during blanking, piercing, notching and trimming. It influences cutting force, burr height, edge shape, slug behavior, dimensional accuracy and tool life. A clearance that is suitable for one material and thickness may perform poorly on another, even when the part geometry is unchanged.
Clearance is not simply an arbitrary space added around the CAD profile. It must be assigned to the punch, die or both according to whether the operation controls a hole, a blank or a trim edge. The toolmaker must also consider material strength, ductility, thickness tolerance, rolling direction, coating, punch size, press alignment, stripper pressure and production volume.
This guide explains how stamping clearance works, how to read a sheared edge, why poor clearance creates burrs and tool wear, how blanking differs from piercing, and how to validate and maintain cutting stations during production.
Quick Answer: What Is Stamping Die Clearance?
Stamping die clearance is the difference between the punch dimension and die opening, usually expressed per side. For a round piercing operation:
Clearance per side = (die diameter − punch diameter) / 2
For a blanking operation, the part size is normally controlled by the die opening, while the punch is made smaller to create the required clearance. For piercing, the hole size is normally controlled primarily by the punch, while the die opening is larger.
The optimum clearance depends on material type, tensile and shear strength, thickness, condition, feature size and required edge quality. It should be selected from validated material guidance and confirmed in trials. A single percentage should not be copied across aluminum, mild steel, stainless steel, copper and high-strength steel without review.
How Sheet Metal Separates During Blanking and Piercing
Cutting is a controlled fracture process. As the press closes, the punch contacts the sheet and pushes it into the die opening. The edge develops in stages:
Elastic deformation occurs as load rises.
Plastic deformation creates rollover at the entry edge.
The punch penetrates and forms a relatively smooth burnished zone.
Cracks initiate at the punch and die cutting edges.
The cracks propagate through the remaining thickness.
The material separates and leaves a fracture zone and burr.
Correct clearance helps the cracks from the punch and die meet cleanly. If they miss each other, the material may experience secondary shear, a rough stepped edge or a larger burr. If clearance is excessive, fracture begins early and the edge becomes heavily tapered or distorted.
The Four Main Regions of a Stamped Cut Edge
A conventional sheared edge often contains four visible regions.
Rollover
Rollover is the rounded entry area where the material bends before the punch penetrates. Its size is affected by clearance, material ductility, punch sharpness, hold-down and part geometry.
Burnished or shear zone
The burnished zone is the smoother area created by direct contact and plastic shearing. A larger burnish zone is not always better. Very tight clearance may increase burnish but also increase force, heat and wear.
Fracture zone
The fracture zone is the rougher area where cracks complete separation. Its angle and texture provide useful clues about clearance and material behavior.
Burr
The burr is the small raised edge on the exit side. Some burr is normal in conventional stamping, but excessive, sharp or uneven burr may indicate wear, poor clearance, misalignment or unstable material.
The complete profile should be evaluated rather than measuring burr height alone.
Clearance Per Side Versus Total Clearance
Clearance specifications can be misunderstood when one party quotes a percentage per side and another assumes total difference. Always state the convention.
For example, if a drawing or design note says a clearance of a certain percentage of sheet thickness, clarify whether it means:
The gap on each cutting side.
The total difference between punch and die dimensions.
A diameter difference for round features.
Tool drawings should show actual punch and die dimensions, not only an ambiguous percentage. The calculation should use the intended material thickness and include the purchased thickness range.
Why Material Thickness Matters
Clearance is commonly related to sheet thickness because thicker material needs more room for fracture and elastic recovery. However, nominal thickness is not the only value that matters.
Incoming coil or sheet may vary within a standard or purchase tolerance. If the tool is designed around nominal stock but the actual coil runs at its upper limit, effective clearance as a percentage of thickness becomes smaller. A thin lot creates a larger relative clearance.
The sourcing and tooling teams should agree on:
Nominal thickness.
Permitted thickness range.
Measurement method.
Whether coating is included.
Material condition and temper.
Lot-to-lot control.
For precision work, measure trial stock at several points and retain the data with the setup record.
How Material Type Changes the Required Clearance
Two sheets with the same thickness can fracture differently.
Mild steel
Low-carbon steel is generally ductile and widely stamped. Clearance depends on grade, strength and edge requirement. A worn tool may continue to make apparently acceptable parts while burr gradually increases, so maintenance limits should be quantitative.
Stainless steel
Stainless grades are often stronger, work-harden rapidly and can generate more heat. Too little clearance can increase galling, punch load and chipping. Lubrication and tool material become particularly important.
High-strength steel
Advanced high-strength steels require careful force calculation, robust tooling and appropriate clearance. The fracture pattern and springback can differ substantially from mild steel. Tool deflection and press energy must be reviewed.
Aluminum
Aluminum alloys have lower density and often lower cutting force, but soft grades may smear, build up on the punch or create a different burr profile. Harder tempers behave differently from annealed material. Surface protection requirements can limit lubrication and handling.
Copper and brass
Copper alloys range from soft, highly conductive sheet to spring-temper material. Soft copper can adhere to tooling, while harder copper and brass may need different clearance and wear strategy. Electrical contacts often have strict edge and burr-direction requirements.
Coated and prefinished sheet
Galvanized, plated, painted or laminated sheet introduces coating behavior. Cutting can expose substrate, create flakes or build debris in the tool. Clearance and maintenance must protect the coating without compromising the metal edge.
Use the exact production grade, temper, coating and supplier condition for final validation.
Blanking Versus Piercing: Which Tool Controls the Size?
Clearance must be assigned according to the useful product.
Piercing a hole
The punched hole is the useful feature and the slug is scrap. The punch normally controls the hole size most directly. The die opening is enlarged around the punch to provide clearance.
Blanking an outside profile
The separated blank is the useful part and the surrounding strip is scrap. The die opening normally controls the blank size. The blanking punch is reduced to create clearance inside the die profile.
Notching and trimming
The same principle applies, but the useful edge and scrap side must be identified locally. Complex stations may contain cutting edges with different ownership directions.
If clearance is applied to the wrong member, the finished part may be systematically oversized or undersized even though the gap itself is correct.
Hole Size, Blank Size and Elastic Recovery
The final part does not always equal the tool dimension exactly. Material can elastically recover, drag on the punch, distort near the cut and change after flattening or forming. The relationship varies with material, clearance and feature size.
For tight dimensions:
Use production-intent material.
Measure the tool and part separately.
Inspect at a defined distance from the burr.
Control part flatness during measurement.
Record burr direction.
Use capability data, not a single sample.
Small holes, narrow slots and close edge distances may deviate more than broad open profiles because the surrounding material is less rigid.
What Happens When Clearance Is Too Small?
Insufficient clearance forces the punch to shear more material before fracture completes. Possible symptoms include:
High press tonnage and energy demand.
A large burnished zone.
Secondary shear or double-break lines.
Rapid edge wear.
Heat generation.
Galling or material pickup.
Punch chipping or breakage.
Slug pulling.
Part distortion around small holes.
Difficult stripping from the punch.
Press and die deflection.
A very smooth-looking edge may hide an expensive tooling condition. Edge appearance must be balanced with force, life and dimensional requirements.
What Happens When Clearance Is Too Large?
Excessive clearance allows the sheet to bend and fracture earlier. Possible results include:
Large rollover.
A steep or tapered fracture zone.
Higher burr.
Hole or blank distortion.
Poor edge squareness.
Greater dimensional variation.
Slug instability.
Edge cracking in later forming.
Reduced support for narrow webs.
Large clearance may reduce cutting force, but it should not be selected only to make the press run easier. The finished edge and downstream function determine the acceptable range.
Burr Direction and Product Design
The burr normally forms on the die-exit side. Its direction should be defined during process planning because it can affect:
Operator handling and safety.
Electrical contact surfaces.
Seal and gasket interfaces.
Sliding assemblies.
Paint and plating coverage.
Appearance.
Fatigue initiation.
Later bending and forming.
If a drawing requires the burr on a particular side, show the presentation direction or tooling orientation clearly. “Burr-free” should not be used without an achievable burr-height limit or a defined deburring operation.
How to Measure Burr Height
Burr height is small and irregular, so measurement method matters. Options include:
Optical microscope with a calibrated stage.
Profile projector.
Stylus profilometer.
Sectioning and metallographic inspection.
3D optical surface measurement.
Comparison samples for routine production checks.
Measure at defined locations and sample enough perimeter to capture local variation. A single point can miss a chipped punch section or corner burr. State whether loose flakes are included and how the reference surface is established.
For high-volume production, establish a correlation between quick shop-floor checks and laboratory measurements.
Reading the Fracture Pattern
The cut edge records what happened during separation. Examine:
Rollover width.
Burnish depth and uniformity.
Fracture angle.
Burr height and direction.
Secondary shear lines.
Local tearing at corners.
Material pickup or smeared areas.
Differences around the perimeter.
Uniform edge zones usually indicate consistent alignment and clearance. A burnish zone that is larger on one side of a hole may suggest lateral misalignment. Burr concentrated at one point may indicate a chip, local wear or deflection.
Edge analysis should be performed with the press stopped and the tool made safe. Magnified photographs provide a useful maintenance history.
Punch-to-Die Alignment
Correct nominal clearance is useless if the punch is not centered in the die opening. Misalignment produces tight clearance on one side and excessive clearance on the other.
Alignment depends on:
Die-set guide posts and bushings.
Punch and die insert location.
Press ram and bolster condition.
Shut height and loading.
Thermal expansion.
Tool deflection under load.
Progressive strip position.
Wear in retainers and pilots.
Check alignment statically and under representative load when necessary. A tool can appear centered by hand but shift as cutting force rises.
Press Deflection and Off-Center Loading
A station with uneven cutting load can tilt or deflect the upper die. Large perimeter blanking, asymmetric notching or several punches entering simultaneously may overload one region.
To reduce the effect:
Balance cutting loads across the die.
Stagger punch lengths when process requirements allow.
Use a press with adequate tonnage, energy and rigidity.
Support die shoes and inserts properly.
Verify shut height and bolster flatness.
Monitor edge condition at high-load locations.
Available press tonnage is not the same as rigidity. A press may have sufficient rated force but still produce uneven clearance under an eccentric load.
Cutting Force and Stripping Force
Cutting force is influenced by cut perimeter, material thickness, shear strength, clearance and edge condition. Tool designers calculate peak load to size the press and die components.
Stripping force is the force required to pull the sheet off the punch during the return stroke. It depends on material springback, clearance, punch surface, lubrication and feature geometry. Small holes and close punch clusters can create substantial stripping demand.
The stripper system must:
Hold the strip flat near the cut.
Prevent the stock from lifting with the punch.
Avoid marking critical surfaces.
Accommodate thickness variation.
Provide enough force without distorting the part.
Unstable stripping can mimic clearance problems by bending the strip or pulling slugs back through the hole.
Punch Shear and Staggered Entry
Adding an angled or stepped shear to the punch face can reduce peak cutting force by spreading separation over part of the stroke. It may help when press capacity is limited, but changes force distribution and slug behavior.
Review:
Whether the useful part remains flat.
Direction of slug deformation.
Effect on punch strength.
Uneven side load.
Ability to sharpen the punch consistently.
Impact on breakthrough and press energy.
Shear should be engineered, not added as an uncontrolled repair for excessive force.
Small Holes and Narrow Punches
When punch diameter or width approaches sheet thickness, the punch becomes vulnerable to bending and breakage. Tight clearance increases load, while excessive clearance can deform the feature.
Strategies include:
Use a suitable high-strength tool material.
Shorten unsupported punch length.
Guide the punch near the stock.
Improve alignment and stripper support.
Use staged or secondary operations.
Consider laser cutting or machining for low volume.
Redesign the hole if function allows.
A small CAD feature is not automatically suitable for mass-production piercing. The supplier should flag risky ratios during DFM.
Slots, Corners and Irregular Profiles
Clearance should be consistent normal to the cutting profile, including corners and curves. CAD offsets can fail at very small radii or narrow gaps, creating tool geometry that cannot be ground or maintained.
Sharp internal corners concentrate stress in the punch. External corners in blanking can chip or create local burr growth. Add practical radii where design permits.
For long slots:
Check punch bending and guidance.
Support the center of long inserts.
Inspect clearance at ends and straight sections.
Plan slug evacuation.
Define the slot measurement method.
Wire EDM, grinding and precision fitting may be combined to achieve and maintain the profile.
Slug Pulling and Slug Control
A pierced slug should leave the cutting area and not return to the strip. Slug pulling occurs when the slug sticks to the punch face and rises with it. It may then be pressed into the part, damage the die or cause a double-metal condition.
Contributing factors include:
Oil adhesion or vacuum at the punch face.
Insufficient die taper or slug retention.
Excessive or uneven clearance.
Punch wear and built-up material.
Magnetic material and tooling.
Poor air release.
Inadequate scrap chute design.
Solutions may include engineered slug-control features, air blow, punch-face geometry, die taper or improved evacuation. Modifications must not create premature wear or unsafe loose scrap.
Scrap and Slug Evacuation
Clearance determines how material enters the die opening, but the scrap path must remain open below it. Slugs that stack, rotate or bridge can damage punches.
Review:
Die land and relief taper.
Clearance below cutting edges.
Chute angle and surface condition.
Oil accumulation.
Sensor coverage.
Scrap conveyor capacity.
Access for safe cleaning.
The die should not depend on operators reaching into hazardous areas to remove recurring scrap jams. Reliable evacuation is part of the tooling design.
Tool Edge Condition and Sharpening
Cutting edges gradually round, chip or gall. As sharpness declines, force, rollover and burr may increase. Wear may be uniform or concentrated at corners and high-load sections.
A sharpening program should define:
Maximum burr height or edge condition.
Shot or stroke interval for inspection.
Amount removed per sharpening.
Minimum remaining insert height.
Method for restoring punch-to-die relationship.
Surface finish and corner requirements.
Coating repair or reapplication.
Sharpening only the punch or die can change shut height, penetration and effective relationships. Restore all associated settings after service.
Tool Steel, Carbide and Coatings
Clearance is only one part of tool life. Material selection must support the expected load, abrasion, chipping risk and production volume.
Options include:
Conventional tool steels for general applications.
Powder-metallurgy grades for wear and toughness balance.
Carbide for high-volume abrasive applications.
Surface treatments or PVD coatings to reduce wear and galling.
Replaceable inserts at critical cutting areas.
A very hard material is not automatically best. Brittle punches may chip under misalignment or shock. Tool steel, heat treatment, finish, lubricant and clearance must be selected as a system.
Lubrication and Material Pickup
Lubrication reduces friction, heat and galling. Its effect varies with material and surface condition. Too little lubricant may cause pickup on punch sides. Excess or inconsistent oil can affect slug adhesion, cleaning and downstream finishing.
Control:
Lubricant type and concentration.
Application location and volume.
Coil cleanliness.
Compatibility with plating, welding and paint.
Removal process.
Environmental and operator requirements.
If burr or force changes after a lubricant adjustment, record the condition before modifying clearance.
Progressive Die Clearance
In a progressive die, cutting stations interact with strip position, carrier stiffness, pilots and downstream forming. A pierced hole may later become a pilot or a functional feature. Burr growth at an early station can affect feeding or forming.
Review clearance together with:
Strip layout and material flow.
Pilot-hole accuracy.
Carrier stretch.
Station timing.
Part lift and strip level.
Scrap direction.
Final cutoff orientation.
If a feature is cut before severe forming, its edge may distort later. Inspection should distinguish the as-pierced condition from the final part.
Compound Die and Fine-Blanking Considerations
Compound dies perform multiple cutting operations in one stroke, which can provide close positional accuracy for flat parts. Load balance, stripping and slug management become critical because several edges cut simultaneously.
Fine blanking is a specialized process that uses controlled clearance, strong clamping and counterpressure to create a high proportion of smooth shear surface. It requires dedicated equipment and tooling. Conventional blanking should not be expected to produce a fine-blanked edge simply by reducing clearance.
If a near-full burnished edge, low rollover or exceptional squareness is functional, discuss fine blanking, shaving, machining or secondary finishing instead of placing an unrealistic requirement on a normal stamping die.
Shaving and Secondary Edge Finishing
Shaving removes a small amount of material from a previously cut edge to improve size, finish or squareness. It may be useful when conventional blanking cannot meet edge requirements directly.
Other options include:
Tumbling or vibratory deburring.
Brushing or belt finishing.
Coining the edge.
Grinding or machining.
Chemical or electrochemical deburring.
Laser trimming for low volume.
Each method affects cost, edge radius, cleanliness and dimensions. A deburring process can remove the burr without producing a perfectly square edge.
Burrs and Downstream Forming
A cut edge may later be bent, flanged, expanded or exposed to cyclic load. Burr direction and fracture quality can influence cracking.
For an edge that will be stretched:
Orient the better edge toward the critical strain direction when possible.
Control burr and damaged fracture material.
Use suitable clearance for edge stretchability.
Consider edge conditioning or shaving.
Validate with production-intent material.
Inspect microcracks after forming.
Hole expansion performance is especially sensitive to cut-edge quality. A hole that meets diameter tolerance may still fail during flanging because of edge damage.
Trial Procedure for New Cutting Clearance
1. Verify tooling and stock
Measure punch, die, guide components and actual material thickness. Confirm grade, temper, coating and lubricant.
2. Establish safe press setup
Use the specified press, shut height, feed height, speed and stripper settings. Confirm safety devices and scrap paths.
3. Produce controlled samples
Run a small sequence at low speed, then at planned production conditions. Identify sample order and stroke count.
4. Inspect the full edge
Check rollover, burnish, fracture, burr, size, flatness and local damage. Compare opposite sides and all cavities.
5. Record force and behavior
Where available, record press tonnage signature, noise, slug flow, stripping behavior and temperature. Sudden spikes can indicate interference or scrap problems.
6. Test downstream operations
Form, assemble, plate or weld samples as required. A cutting station is not approved only because the first flat part looks acceptable.
7. Run a capability sample
After the process stabilizes, collect enough consecutive parts to evaluate critical dimensions and burr trend. Include all cavities or lanes.
8. Document the approved baseline
Record tool dimensions, material lot, press, settings, lubricant, part results and photographs. Use the baseline for maintenance comparison.
Troubleshooting Uneven Burrs
If burr is high on only one side of a hole or profile, investigate:
Punch-to-die misalignment.
Worn guide posts or bushings.
Insert movement.
Off-center press loading.
Uneven die shoe support.
Local punch damage.
Strip not lying flat.
Material thickness variation.
If all edges show gradual burr growth, general wear is more likely. If burr changes suddenly, look for chipping, a loose component, double material or a scrap incident.
Do not automatically enlarge the die opening. That may hide a tight side while making the opposite side worse.
Troubleshooting High Cutting Force
High force can result from:
Insufficient clearance.
Dull edges.
Higher-strength material lot.
Greater actual thickness.
Simultaneous punch entry.
Galling or poor lubrication.
Punch and die interference.
Incorrect shut height.
Scrap stacking below the die.
Compare the current condition with the approved tonnage signature and material certificate. Stop the press if force rises unexpectedly; continuing may convert a small obstruction into major tool damage.
Troubleshooting Punch Breakage
Punch breakage is rarely solved by replacing the same component without investigating the system.
Check:
Alignment and clearance around the entire profile.
Punch hardness, toughness and grain direction.
Unsupported punch length.
Retainer fit and backing support.
Stripper guidance.
Material double-feed or thickness.
Slug pulling and scrap jams.
Press deflection.
Sharpening damage and corner radii.
Fracture-surface examination can help distinguish bending fatigue, impact, chipping and overload.
Production Control Plan
A cutting operation control plan may include:
Incoming material grade and thickness.
First-piece dimensional inspection.
Burr height at defined locations.
Hole, slot and blank dimensions.
Edge appearance comparison.
Part flatness.
Slug and scrap monitoring.
Press tonnage limits.
Lubricant checks.
Tool inspection interval.
Reaction plan for abnormal results.
Trend data is more valuable than isolated pass/fail results. Rising burr and force can trigger planned maintenance before failure.
Preventive Maintenance Checklist
Clean cutting and relief areas.
Remove scrap safely.
Inspect punch and die edges under magnification.
Measure burr at approved sample locations.
Check guide posts, bushings and retainers.
Verify stripper travel and pressure.
Inspect pilots and feed alignment.
Check slug-control features.
Inspect chutes and sensors.
Confirm lubricant delivery.
Measure critical insert positions.
Record sharpening amount and remaining life.
Verify press shut height after service.
Produce and approve a new first-off sample.
DFM Checklist for Blanked and Pierced Parts
Specify exact material grade, temper and thickness.
State coating or finish condition.
Use practical minimum hole and slot sizes.
Maintain adequate distance between holes and edges.
Add corner radii where function permits.
Identify critical part and hole dimensions.
Define burr direction.
Set a measurable burr limit.
Identify edges that will be stretched or sealed.
State flatness requirements and restraint condition.
Avoid unnecessary ultra-tight profile tolerances.
Identify cosmetic and handling edges.
Plan deburring or shaving where needed.
Provide annual volume and tool-life target.
RFQ Information for a Stamping Die
Include the following information when requesting a quotation:
Native 3D CAD and controlled 2D drawing.
Part number, revision and annual quantity.
Material specification, temper and thickness range.
Coil width, feed direction and surface condition.
Coating, plating or protective film.
Critical dimensions and datum scheme.
Burr direction and maximum burr height.
Edge-finish or burnish requirements.
Features that undergo later forming.
Required press type, speed or available equipment.
Progressive, compound, transfer or single-operation preference.
Expected die life and maintenance responsibility.
Inspection, capability and first-article requirements.
Deburring, cleaning and finishing operations.
Packaging and traceability requirements.
If material may come from multiple mills, state the allowed range of mechanical properties. The die supplier can then evaluate whether one clearance and setup will cover the full production window.
Questions to Ask a Stamping Die Supplier
What punch-to-die clearance is proposed and how is it defined?
Is the clearance per side or total?
Which member controls each finished dimension?
What material data supports the selection?
How will clearance be maintained around corners and small features?
How will slugs and skeleton scrap be evacuated?
What prevents slug pulling?
Which tool steel, heat treatment or coating will be used?
How is punch alignment verified under load?
What burr height and tool life are expected?
How will the die be sharpened without losing dimensional control?
What press tonnage and rigidity are required?
How will all cavities or lanes be identified and inspected?
What trial and capability records will be supplied?
Frequently Asked Questions
What is the correct clearance for sheet metal stamping?
There is no universal value. Clearance depends on material grade, strength, thickness, feature size, edge requirement and tool-life target. Use validated material guidance as a starting point and confirm the result with production-intent trials.
Is stamping clearance measured on one side or both sides?
It can be stated either way, which is why drawings must be explicit. Clearance per side is the gap at one cutting edge. Total clearance is the full punch-to-die dimensional difference across a feature.
Does the punch control the hole size?
In a conventional piercing operation, the punch normally controls the hole most directly and the die opening is larger to provide clearance. Material recovery and process conditions can still shift the measured result.
Does the die control the blank size?
In conventional blanking, the die opening normally controls the useful blank profile and the punch is smaller by the required clearance.
Why does a stamped edge have a smooth area and a rough area?
The smooth burnished area forms while the punch plastically shears the material. The rough fracture area forms when cracks propagate and complete separation. Their proportions depend on clearance, material and edge condition.
Can very small clearance eliminate burrs?
No. Very tight clearance may reduce some burr appearance initially but increases force, heat and wear and can create secondary shear. A measurable burr allowance or secondary finishing process is usually more realistic.
Why is the burr larger on one side of a hole?
Uneven burr often indicates off-center punch-to-die alignment, local wear, insert movement, strip tilt or press deflection. Inspect the full perimeter before changing nominal clearance.
How often should punches and dies be sharpened?
The interval depends on material, thickness, tooling, lubrication, speed and burr limit. Use measured burr and force trends rather than a universal stroke count.
Can more clearance increase tool life?
Within a suitable range, increased clearance can reduce force and wear. Excessive clearance harms edge quality, dimensions and downstream formability. Tool life must be balanced with product requirements.
What causes slug pulling?
Oil adhesion, vacuum, magnetism, poor slug retention, punch wear and unstable clearance can cause a slug to rise with the punch. The complete slug-control and evacuation system should be reviewed.
What is secondary shear?
Secondary shear is an additional sheared band created when fracture cracks do not meet cleanly and the remaining material is cut again. It is often associated with overly tight or uneven clearance.
Is fine blanking the same as using tight clearance?
No. Fine blanking uses specialized tooling, strong clamping, counterpressure and dedicated equipment. Simply reducing clearance in a conventional die does not reproduce the process.
Should burr direction be shown on the drawing?
Yes when it affects safety, assembly, electrical contact, sealing, fatigue or appearance. Show the permitted side and a measurable burr limit.
Request a Stamping Die DFM and Quotation
Reliable stamped edges come from a controlled relationship between material, punch, die, press, stripper and scrap system. Correct clearance allows fracture to complete predictably without demanding excessive force or sacrificing edge quality. Trials and trend-based maintenance keep that condition stable as the tool wears.
Aluprototype supports custom manufacturing and tooling services for prototype and production metal parts. For flat components that combine blanking and piercing in one stroke, see the Compound Die Guide.
Send your CAD data, drawing, material specification, thickness, annual volume, burr requirement and inspection plan through the request-a-quote page. The engineering team can review cutting clearance, feature feasibility, die type, press requirements and quality controls before tooling begins.