Customised piercing punches are press-tool punches manufactured to a buyer’s approved drawing, profile, dimensions, mounting, material, hardness, coating and inspection requirements. Vardhman lists M2, M35 and M42 HSS, 0.2–50 mm diameter wording, 50–100 mm and custom lengths, 64 ± 2 HRC, MOQ of 25 pieces and carton or client-specific packing.
A customised piercing punch is a press-tool punch manufactured to an approved buyer drawing, defined profile, dimensions, mounting, material, heat treatment, finish, coating and inspection requirement. Unlike a standard catalogue punch, it is engineered for a specific die, work material, thickness, operation, production volume and replacement strategy.
State clearly whether each dimension represents the required finished hole, the punch cutting profile or the slug/blank. In piercing, the punch primarily controls the hole while the die opening includes clearance. If only the finished hole is supplied, the toolmaker must know material, thickness and clearance strategy.
A custom punch is appropriate when the required profile, dimensions, orientation, mounting, working length, support, material, coating, tolerance or inspection cannot be met by a standard product. Before creating a new design, compare the requirement with Vardhman's standard HSS, square, D-shape, step, pilot and carbide ranges.
Carbide may be considered where dimensional stability and abrasive wear dominate in a stable, well-aligned, high-volume process. It is less tolerant of shock, bending and misalignment than HSS. Geometry, support, clearance, stripping and production volume should be reviewed before choosing solid or tipped carbide.
The live page lists HSS M2, M35 and M42. Buyers should request the exact grade, material certificate and heat-treatment condition for the approved design. The best grade depends on profile strength, wear, impact, work material, thickness, speed, support and failure history.
The live page does not publish a confidentiality or NDA process. Buyers should ask who can access files, how revisions are stored, whether third-party processors receive drawings and how obsolete data are controlled. Vardhman should provide an approved confidentiality statement rather than an assumed promise.
A suitable coating or surface treatment can reduce friction, galling or abrasive wear in selected applications. It must match the HSS or carbide substrate, heat treatment, profile, tolerance, work material and lubricant. The drawing should state whether dimensions apply before or after coating.
Sometimes a standard blank or configurable punch can be shortened, ground to a profile, given a key/flat, adjusted for a mounting feature or coated. Feasibility depends on remaining material, heat treatment, hardness zone, support and tolerance. Vardhman should review the final drawing before recommending modification or new manufacture.
A clear 2D drawing can be sufficient when it defines every profile dimension, datum, tolerance, orientation, material, hardness, finish, mounting and inspection requirement. A 3D model helps with complex transitions, but it does not replace a controlled drawing unless both parties agree which file governs production.
A 3D model is useful for complex stepped bodies, curved transitions, compound profiles, pockets, mounting features and interference checking. It should be accompanied by a drawing that defines datums, tolerances, surface finish, material, hardness and revision because neutral CAD files may not carry all manufacturing requirements.
Show the profile in a clearly defined operating or reflected view, identify its orientation relative to the shank, key, flat, ball seat, dowel or mounting datum and state clockwise/counter-clockwise direction where needed. Avoid relying on an unlabelled plan view because mirrored profiles can be manufactured incorrectly.
Datums establish the reference axis, face and orientation from which dimensions and geometric tolerances are measured. Without them, profile position, runout, head location, key angle and overall length can be interpreted differently. Use functional datums that match how the punch mounts and operates in the die.
Specify critical profile dimensions, shank and holder fit, working and overall length, concentricity or runout, straightness, profile position, orientation, head or mounting dimensions, corner radii and surface finish. General tolerances can cover non-critical features, but functional dimensions need explicit acceptance limits.
State whether dimensions refer to theoretical sharp corners, actual measurable tangency points or a maximum/minimum corner radius. Grinding and wire EDM cannot produce infinitely sharp internal or external corners. The matching die profile and required clearance must use the same corner convention.
A photo or sketch may support an initial discussion but usually cannot define hidden geometry, tolerances, material, hardness or fit. A physical sample can be measured, but wear and damage may have changed its original dimensions. Final production should use an approved reconstructed drawing and stated assumptions.
Clearance depends on work material, thickness, strength, hole-edge requirement, slug control, profile and tool-life target and should be expressed per side. Do not derive it from the drawing profile alone. The buyer and toolmaker should agree whether the punch or finished hole dimension is controlling.
Select the grade by balancing wear resistance, toughness, compressive strength, edge stability, grindability and hot hardness for the actual application. A slender, shock-loaded profile may need more toughness; an abrasive, stable, high-volume application may need greater wear resistance or a PM/carbon alternative.
Use the shortest working point that allows full material penetration, die entry, stripper travel and planned regrinding. Excess point length increases bending and breakage risk, especially on small or shaped profiles. Point length should be reviewed with guide support, work thickness and die stack.
Specify shank diameter or profile, fit/tolerance, engagement length, holder or retainer type, anti-rotation feature, backing support and replacement method. If the punch must fit an existing holder, provide its measured bore, drawings and condition because nominal catalogue size alone may not ensure compatibility.
Possible styles in the wider press-tool market include press-fit, headed/flanged, stepped, block, threaded, keyed, dowelled and ball-lock designs. Vardhman's actual capability must be confirmed against the drawing. The mounting style should carry cutting and stripping loads while controlling alignment and replacement.
Slug pulling is an application problem involving clearance, entry, punch face, lubricant, magnetism, vacuum, die land and relief. A custom punch may include an ejector, but the die button may require slug-retention features. Submit material, thickness, profile, speed and current failure evidence for review.
Every quotation, order, drawing approval, inspection report and package label should reference a unique part number and revision. Changes to dimensions, material, hardness, coating, quantity or inspection should require written approval. Superseded files should not remain available for production without clear status.
The cutting profile, shank and mounting axis must align with the intended datum. Excess runout creates uneven clearance, side loading, poor hole position, tapered profiles and premature wear. State whether total runout, concentricity, profile position or another geometric control is required.
Hardness must be selected for the exact grade, geometry and application and balanced against toughness. The live page lists 64 ± 2 HRC, but custom headed, annealed-head, stepped or slender designs may require defined hardness zones and test locations. Request an approved heat-treatment plan.
Yes. Provide the failed punches, fracture location, die and holder drawings, work material and thickness, clearance, point length, speed, lubrication, press alignment, slug behaviour and tool-life history. A redesign may change grade, support, radius, mounting, coating, clearance or maintenance interval.
Yes, if the approved drawing defines the cutting face, profile, shear, regrind direction and minimum working length. Regrinding must preserve orientation, runout and coating strategy. Keep the controlled drawing, inspection report and part number so replacement punches match the approved revision.
State the roughness parameter, value, lay direction and applicable surfaces. The cutting profile, relief, guided shank, head seating surface and lapped areas may need different requirements. The live 0.3–0.04 micron range is incomplete without identifying Ra, Rz or the measured surfaces.
An ejector pin or similar mechanism can help release or control slugs in selected applications. It changes the punch construction, point dimensions, maintenance and matched die requirements. Vardhman's capability must be confirmed from the profile, diameter, material, thickness, speed and slug problem.
Non-round, asymmetric, offset or shear-faced punches must maintain angular orientation. A key, flat, dowel, locking device, ball-seat relationship or shaped shank can prevent rotation. The drawing should specify the feature, angle and datum relative to the cutting profile.
Ball-lock systems allow quicker punch and die-button replacement when dimensions, ball-seat location and retainer are compatible. A custom point or shape may be possible on a ball-lock body, but Vardhman should confirm ball-seat geometry, orientation, duty class and retainer compatibility before quotation.
Send a dimensioned PDF as the controlled visual reference and, where available, DXF or DWG for 2D profiles and STEP, IGES or native CAD for 3D geometry. Include the drawing number, revision, units and contact details. Vardhman should confirm its accepted formats and upload limits.
The live page confirms custom punches but does not explicitly confirm matched die supply. A punch-and-die set can reduce profile and clearance mismatch when both are manufactured from one approved design. Send the operation, material, thickness, finished hole requirement and mounting details for capability confirmation.
Provide the exact material specification or grade, hardness or temper where relevant, minimum and maximum thickness, coating or plating, surface condition and expected batch variation. These details affect grade, clearance, point support, coating, stripping force, slug behaviour and expected tool life.
Include cutting profile, point or working length, relief/back taper, body diameter, shank and fit, head/flange or ball-lock details, fillet, overall length, key/flat/dowel orientation, face geometry, coating allowance, regrind allowance and any matched guide or die dimensions.
Depending on order requirements and supplier capability, request a material certificate, grade identification, heat-treatment or hardness report, coating certificate and dimensional inspection report. Required documents should be agreed at quotation stage because they affect process, traceability, inspection and price.
Inspection can use calibrated micrometers, height gauges, optical comparators, profile projectors, CMMs, contour instruments, gauges or matched samples depending on size and tolerance. The drawing should identify critical characteristics and the agreed method, especially for radii, angles and complex profiles.
The live page does not state a first-article service, but buyers can request dimensional results against the approved drawing before series release. The scope should define report format, measured characteristics, material/hardness documents, sample quantity and whether buyer approval is required before balance production.
For critical profiles or new die applications, a first punch, sample pierced part or trial report can reduce risk. Approval responsibility, trial material, die availability, acceptance criteria, timing and cost must be agreed in advance. A physical sample does not replace the controlled drawing and revision.
Provide Vardhman's previous quotation or order reference, part number, approved drawing revision, quantity and any documented performance changes. Confirm whether the existing material, hardness, coating, inspection and packaging remain valid. Do not order only by a generic product name if multiple revisions exist.
Price depends on profile complexity, dimensions, construction, HSS or carbide grade, heat treatment, grinding, wire/sinker EDM, lapping, coating, tolerances, quantity, inspection, certificates, first-article requirements, packaging and destination. A controlled drawing is required for a reliable quote.
The live page states an MOQ of 25 pieces. Confirm whether this applies per unique drawing and revision, whether mixed profiles can be combined and whether prototype or breakdown replacement quantities are available. Custom manufacturing setup and inspection may affect commercial conditions.
Unique finished custom punches are normally produced against an approved drawing, although standard blanks, materials or repeat-order parts may be available. The live statement about standard stock should not be interpreted as universal stock of every custom profile. Request availability against a part number and revision.
Lead time depends on drawing completeness, engineering review, material or blank availability, manufacturing route, heat treatment, coating, inspection, first-article approval, quantity, packaging and export documentation. Vardhman should confirm a delivery schedule only after the drawing and commercial scope are frozen.
Each punch should be protected against edge impact, mixing and corrosion and labelled with buyer part number, Vardhman reference, drawing revision, quantity and batch where required. Include agreed inspection and material documents. Export packing should match weight, destination and transport mode.
The page states worldwide export capability. International buyers should provide drawing units, material standards, quantity, destination, required Incoterms, packing, certificates and inspection requirements. Final freight, taxes, duties and delivery commitments must be confirmed in the quotation.
A physical punch can be inspected and measured when the original drawing is unavailable, subject to remaining unworn geometry, material identification, hardness, hidden features and buyer rights. Vardhman should create a proposed drawing with stated assumptions for approval before manufacturing the replacement.
Yes, potentially, from an existing punch, matching die, pierced part, holder dimensions and application data. Wear may have altered the original size, so the target should be reconstructed from functional requirements rather than copied blindly. Buyer approval of the replacement drawing is essential.
Send clear photos, remaining punch and die dimensions, holder details, required profile or sample part, material and thickness, machine status, quantity, delivery location and any old order reference. State which dimensions are verified and which are estimates. Final manufacture still requires an approved technical definition.
A matched set is valuable for complex profiles, close tolerances, very small clearance or uncertain existing die dimensions because profile, corner convention, orientation and clearance can be coordinated. If only a punch is ordered, provide accurate die inspection data and identify who owns clearance responsibility.
Send the controlled drawing or measurable sample, work material and thickness, operation, press and production data, profile orientation, point/body/shank/head dimensions, mounting, clearance responsibility, HSS or carbide preference, hardness, coating, quantity, inspection, certificates, packaging, revision and destination. Approve the final drawing before production.
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