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Tools · DIN 22568 / DIN EN 22568 (round split dies) · Application guide

What Are Round Split Dies and Die Stocks Used For?

Typical applications, the industries that specify round split dies and die stocks, and how to choose the right size, material and finish for the joint.

Round Split Dies and Die Stocks are used for installing, adjusting or servicing the assembly rather than forming part of it. They are manufactured to DIN 22568 / DIN EN 22568 (round split dies), and selection is driven by the nominal size, the fit and tolerance the assembly requires, and the service environment.

Primary duty
Installing, adjusting or servicing the assembly rather than forming part of it
Governing standard
DIN 22568 / DIN EN 22568 (round split dies)
Nominal size range
16 mm to 45 mm
Category
Tools

Application notes are general engineering guidance. Verify the property class and any approval requirement against your own design calculation.

What Are Round Split Dies and Die Stocks Used For? application image

Round Split Dies and Die Stocks are used primarily for installing, adjusting or servicing the assembly rather than forming part of it. This page lists the industries and assemblies where they are specified, the selection criteria that matter for each application, installation practice, and the cases where a different fastener type is the correct choice. Parts are supplied to DIN 22568 / DIN EN 22568 (round split dies). Stocked across roughly 16 mm to 45 mm, they cover heavy and structural work.

Typical Applications for Round Split Dies and Die Stocks

The most common settings where these are specified:

  • General machine building: fastening covers, brackets, motors and sub-assemblies on production equipment.
  • Maintenance & repair (MRO): a stocked size for servicing existing plant where the original fastener spec must be matched.
  • Fabrication & metalwork: bench and on-site assembly of steel frames, enclosures and weldments.

How to Specify Round Split Dies and Die Stocks for Your Application

  • Size: Select on nominal size, and confirm it against the mating feature in the assembly. This product spans 16 mm–45 mm; check the full table below for the exact dimensions of each size.
  • Material: Choose the material and finish for the service environment — plated steel for general use, stainless for corrosion resistance.
  • Environment: For damp, coastal or chemical exposure prefer A4/316 stainless or a suitable coating; indoors, plated steel or A2 is usually sufficient.
  • Standard: This product is supplied to DIN 22568 / DIN EN 22568 (round split dies). Quoting the standard on your order guarantees interchangeable dimensions between suppliers.

Where Round Split Dies and Die Stocks Are Not the Right Choice

Match the fastener to the load, environment and whether the joint must be reopened; the wrong class or style is the usual cause of joint failure.

Technical Drawing

Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the size will snap the other fields to that size's standard values; you can then override any individual value.

Sends the selected values to the quote form below.

Request a Quote

The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.

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Specification
Business Information

Dimensions & Specifications (DIN 22568 / DIN EN 22568 (round split dies))

Die outside diameterThread range typically heldAdjustmentHeld in
16 mmM1 u2013 M2.5split, three-screw adjustment16 mm die stock
20 mmM3 u2013 M5split, three-screw adjustment20 mm die stock
25 mmM6 u2013 M8split, three-screw adjustment25 mm die stock
30 mmM9 u2013 M12split, three-screw adjustment30 mm die stock
38 mmM14 u2013 M20split, three-screw adjustment38 mm die stock
45 mmM22 u2013 M24split, three-screw adjustment45 mm die stock
Inside the plant

Manufactured in our own plant

This part is cold-formed, threaded, heat-treated and finished in-house. The stages below are where its class and finish are actually decided.

  1. Wire rod feeding into a cold heading machine
    01

    Cold heading

    Wire rod is drawn to size and cold-formed into blanks. Forming rather than cutting keeps the grain flow continuous around the head, which is where a bolt is most likely to fail.

    Head dimensions and under-head radius checked at set-up and per shift.

  2. Thread rolling machine producing bolt threads
    02

    Thread rolling

    Threads are rolled between hardened dies rather than cut. Rolled threads are stronger in fatigue than cut threads and hold pitch and flank angle far more consistently across a batch.

    Go / no-go ring gauges to ISO 965 tolerance class 6g.

  3. Baskets of bolts staged for heat treatment
    03

    Heat treatment

    Quench-and-temper brings carbon and alloy steel to the property class ordered — 8.8, 10.9 or 12.9 — with the furnace charge tracked so a finished lot can be traced back to it.

    Core hardness and tensile tested per lot to ISO 898-1.

  4. Zinc plated bolts in a treatment basket
    04

    Surface treatment

    Zinc, zinc-nickel, hot-dip galvanizing, black oxide, phosphate and Dacromet, selected against the service environment rather than against the price list.

    Coating thickness and neutral salt spray hours to ISO 9227.

Frequently Asked Questions

What are Round Split Dies and Die Stocks used for?

Installing, adjusting or servicing the assembly rather than forming part of it. They are supplied to DIN 22568 / DIN EN 22568 (round split dies).

Which industries use Round Split Dies and Die Stocks?

They are commonly specified in general machine building, maintenance & repair (mro) and fabrication & metalwork, among other sectors.

How do I choose the right size of Round Split Dies and Die Stocks?

Select on nominal size and on the fit the assembly requires. This product is available from 16 mm to 45 mm; the full dimension table on this page lists each size.

Are Round Split Dies and Die Stocks made to a recognized standard?

Yes — they are manufactured to DIN 22568 / DIN EN 22568 (round split dies), so dimensions are interchangeable between suppliers when you quote the standard on your order.

Can I get a quote for Round Split Dies and Die Stocks in the size and material I need?

Yes. Use the technical drawing and quote form on this page to set the size and options, then send the exact configuration to our team for pricing and lead time.