Thread Rolling Dies
Custom Thread Rolling Dies for Screws and Bolts
Drawing-based thread rolling dies for screw and bolt production. Jungu checks thread profile, blank diameter control, machine slot, material grade, and current thread defects before quoting.
What is Custom Thread Rolling Dies for Screws and Bolts used for?
Thread rolling dies for screws and bolts form external threads by moving material instead of cutting it away. The die is only reliable when the blank diameter, thread class, material hardness, and rolling machine setup match the drawing. For a normal 6g screw thread, blank control is already a hard review point; if the blank diameter drifts beyond +/-0.05 mm, the die may produce shallow flanks or unstable pitch even when the die itself is made correctly. Jungu reviews pitch, major diameter, minor diameter, lead-in length, blank material, tensile grade, flat-die size, machine model, and current thread failure photos before treating a quotation as final. This page is for buyers replacing worn thread rolling dies or sourcing a new die set for screw, bolt, stud, or self-tapping fastener production.
Common sourcing use
External thread forming for screws, bolts, studs, and self-tapping fasteners where blank control and thread gauge stability decide tool life.
Related product families
Technical Review Scope
What Jungu checks
- Thread standard, pitch, major diameter, minor diameter, thread length, and tolerance class
- Blank diameter tolerance, cut length stability, surface condition, and lead-in design
- Fastener material, tensile grade, wire hardness, and stainless or 12.9-grade pressure risk
- Flat thread rolling machine model, die size, mounting angle, stroke, and target pieces per minute
- Current failure mode: shallow thread, torn flank, pitch drift, galling, chipping, or short die life
Why no standard price is shown
This is B2B custom tooling. A reliable quotation depends on drawing, material, size, tolerance, machine setup, annual quantity, and the mould-life issue the buyer wants to solve. Jungu quotes after technical review instead of showing a misleading fixed price.
Information Needed for Quotation
| Thread geometry | Drawing with thread standard, pitch, major/minor diameter, thread length, tolerance class, and gauge requirement. |
|---|---|
| Blank control | Blank diameter tolerance, blank length, material grade, hardness, and surface condition before rolling. |
| Machine fit | Rolling machine model, flat-die dimensions, mounting slot, stroke, speed target, and current die photos. |
| Failure evidence | Photos of worn dies, rejected thread flanks, gauge failures, pitch drift, or galling marks. |
Application and Buyer Fit
| Typical application | external thread forming for screws, bolts, studs, and self-tapping fasteners where blank control and thread gauge stability decide tool life |
|---|---|
| Buyer review focus | thread standard, pitch, blank diameter tolerance, workpiece length, rolling machine model, material grade, surface finish, and thread gauge result |
| Quotation basis | drawing, material, tolerance, machine model, quantity, and target tool life |
| Review output | a thread rolling die route matched to flat-die size, blank control, material flow, and the buyer's inspection method |
Inquiry Process
- Send the fastener drawing, thread standard, blank data, and current die or reject photos.
- Jungu checks whether the failure is caused by die design, blank diameter, material, setup, or machine fit.
- Engineering confirms flat die size, profile compensation, heat treatment, coating, and inspection points.
- A quote is prepared only after the thread route matches the buyer's machine and gauge requirement.
FAQ
Can one thread rolling die handle both 8.8 and 12.9 fasteners?
Not safely by default. Higher tensile grade raises rolling pressure and die-edge risk, so Jungu checks material hardness, blank diameter, profile depth, and coating route before confirming.
Why does blank diameter matter so much?
The thread is formed from displaced material. If the blank is oversized, rolling pressure rises; if it is undersized, the thread flank may not fill and gauge results become unstable.
What makes a quote unreliable?
A quote given without thread profile, blank tolerance, machine model, and current failure photos is usually only a placeholder, not an engineering offer.
Can this product be customized?
Yes. Jungu manufactures fastener mould tooling according to buyer drawings, samples, and machine requirements.
Need this tooling reviewed?
Send drawings, machine model, material, and current failure photos for review.