Bolt & Screw Forming Dies
Metal Die Bolt Tooling for Engineering Parts
Metal die bolt tooling for engineering cold-formed parts. Jungu checks drawing tolerance, blank control, station load, cavity support, material route, and defect evidence before quoting.
What is Metal Die Bolt Tooling for Engineering Parts used for?
Metal die bolt tooling for engineering parts is used when a cold-formed part has a custom head, shoulder, shank transition, or functional geometry rather than a simple standard bolt. The die route must be reviewed against the drawing tolerance and actual forming load. If the transition radius is too small, material folds can appear. If the blank is not controlled, the cavity may alternate between poor fill and excessive pressure. Jungu reviews the part drawing, functional surfaces, blank diameter and cut length, material grade, station layout, cavity radius, die case support, release angle, lubrication, and photos of folds, cracks, sticking, or measurement drift before quoting. The goal is to decide whether the issue is cavity design, process data, or support structure.
Common sourcing use
Engineering part cold forming where functional surfaces, shoulder transitions, blank control, and tolerance targets drive die design.
Related product families
When does the part need an engineering-tooling review?
Use this page when the component has non-standard shoulders, shank transitions, functional contact surfaces, or drawing tolerances that cannot be treated as a conventional bolt-head cavity. If the job is a standard bolt or screw cold-heading sequence and the main questions are blank volume, head fill, die-case support, and release, use the bolt tooling page.
Technical Review Scope
What Jungu checks
- Engineering part drawing, functional surfaces, shoulder radius, tolerance, and inspection method
- Blank diameter, cut length, material grade, hardness, lubrication, and surface condition
- Machine station, forming sequence, die case support, release angle, and cavity finish
- Failure: fold, crack, sticking, poor fill, eccentricity, measurement drift, or short die life
Why no standard price is shown
Engineering-part tooling is quoted after the functional surfaces and inspection priorities are identified. Custom shoulders, transitions, cavity support, forming sequence, material, and defect evidence can change the die route even when the outside size looks similar to a bolt die.
Information Needed for Quotation
| Drawing priority | Functional dimensions, tolerance target, shoulder transition, and inspection method. |
|---|---|
| Blank and material | Blank diameter, cut length, material grade, hardness, lubrication, and surface condition. |
| Die route | Station layout, cavity radius, die case support, release angle, and surface finish. |
| Defect evidence | Photos of folds, cracks, sticking, drifted dimensions, failed gauge, or worn die area. |
Application and Buyer Fit
| Typical application | engineering part cold forming where functional surfaces, shoulder transitions, blank control, and tolerance targets drive die design |
|---|---|
| Buyer review focus | functional geometry, blank data, material, station load, cavity radius, release angle, die support, and measurement drift |
| Quotation basis | drawing, material, tolerance, machine model, quantity, and target tool life |
| Review output | a metal die route matched to the engineering drawing, forming sequence, support structure, and inspection target |
Inquiry Process
- Send drawings and application details.
- Jungu reviews manufacturability and tooling route.
- Engineering confirms material, tolerance, and mould-life target.
- Quotation and lead time are prepared after technical confirmation.
FAQ
Can a standard bolt die route be used?
Only if the functional surfaces and tolerance are similar. Engineering parts usually need a separate cavity review.
Why does the same die produce dimension drift?
Blank size, material hardness, lubrication, machine load, or cavity wear may have changed.
What drawing marks are useful?
Mark the functional surfaces, tolerance-critical dimensions, and where the current part fails inspection.
Why should functional surfaces be marked on the drawing?
They show which dimensions and transitions control assembly or performance. That lets engineering focus cavity support, finishing, and inspection on the areas that matter to acceptance.
Need this tooling reviewed?
Send drawings, machine model, material, and current failure photos for review.