Center Dowel Ejector Punch Blanks - Metric

Q: Which steel grade (A2 vs M2) is better for ejector alignment blanks in die sets?

This series is available in A2 or M2 . A2 is typically chosen when you need a balance of wear resistance and toughness to reduce chipping risk under interrupted loads. M2 is commonly selected for applications that prioritize wear performance and longer service life where interface temperatures and sliding wear are more demanding.

Q: How do I choose the shank diameter (D) for the center guiding in a punch/ejector system?

Use the provided diameter options: D = 10, 13, 16, 20, 25, or 32 mm . The goal is to match the diameter of your center guidance feature (e.g., locating bore/bushing) so the blank maintains alignment without excessive play. Confirm your die tolerances so the fit supports smooth motion under ejection loads.

Q: What length (L) range should I use when designing ejector stroke and guide engagement?

This product is specified with L = 71 to 130 mm . Select L based on your stack-up distance from the ejector linkage to the guided working zone, including any bushings and required clearances. Using too short a length can reduce guide engagement; too long a length can cause bottom-out interference.

Q: Does the metric center dowel ejector punch blank fit standard die set layouts?

It is a metric center dowel style blank intended to standardize tooling dimensions in punch and ejector systems. The availability of multiple shank diameters (10–32 mm) and lengths (71–130 mm) supports compatibility with common metric die set packaging and centerline guidance schemes.

Q: What is the main function of using a center dowel style ejector punch blank in tooling?

The center dowel style blank provides stable center guiding and helps maintain ejection alignment between punch and die components. This reduces the risk of off-center stripping, inconsistent part release, and alignment-related wear in the guide interfaces.

Center Dowel Ejector Punch Blanks - Metric (M2 or A2 steel) are precision die components designed to support reliable center guiding and ejection alignment in punch and ejector systems. These metric blanks help standardize part manufacturing for predictable press performance.

Center dowel style blank for consistent locating in die assemblies
M2 or A2 steel base material for durable, wear-tolerant punch performance
Supports shank diameters from 10 to 32 mm for flexible die design
Metric length range 71 to 130 mm to match common ejector layouts

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Specifications

12 configurations available

Material	D (Shank dia.) (mm)	L (Length) (mm)
A2	10	71 ～ 130
M2	10	71 ～ 130
A2	13	71 ～ 130
M2	13	71 ～ 130
A2	16	71 ～ 130
M2	16	71 ～ 130
A2	20	71 ～ 130
M2	20	71 ～ 130
A2	25	71 ～ 130
M2	25	71 ～ 130
A2	32	71 ～ 130
M2	32	71 ～ 130

Product Guide

🏭Application Scenarios+

Center dowel style ejector punch blanks are used in punch and ejector tooling where alignment directly affects stripping stability, part finish, and dimensional consistency. In automotive connector or terminal die sets, these blanks support stable guiding between the moving punch side and stationary die components, helping maintain concentricity during high-cycle ejection.

For appliance and stamped metal components, the metric shank options (10 to 32 mm) allow engineers to match the center guidance scheme used in standard ejector layouts. The specified length window (71 to 130 mm) supports typical ejector stroke packaging while keeping the punch guided through the die.

M2 or A2 steel selection supports durable performance under sliding contact and intermittent shock during ejection.
Use a center dowel locating blank when your die set requires repeatable centerline alignment for punch-to-die fit.

🔧Material & Process Details+

This series is supplied in either A2 or M2 steel, both suited to punch blank applications where guiding surfaces must resist wear while tolerating the mechanical loads of ejection.

A2 tool steel: typically supplied in the hardened condition and selected for a balance of toughness and wear resistance, helping reduce chipping risk during interrupted cutting or ejector impacts.
M2 high-speed steel: commonly chosen when higher hot wear resistance and longer life are required at elevated interface temperatures. It generally provides stronger wear performance, with a trade-off of slightly lower toughness compared with tougher tool steels.

Because heat treatment depends on the specific grade and hardness target, final hardness is controlled by the manufacturer’s process to achieve the intended wear/toughness balance for die set guiding and ejection alignment.

📐Sizing & Selection Guide+

Select the blank using the shank diameter (D) and length (L) to match your die’s center guidance and ejector layout. The available shaft diameter options are D = 10, 13, 16, 20, 25, or 32 mm.

Choose L = 71 to 130 mm based on the stack-up from the moving plate to the guided work zone, including any support bushings and adjustment clearances. A correct length prevents over-compression at bottom-out and avoids insufficient guide engagement during ejection.

Match D to the centerline bore or locating feature diameter in your guide system for proper fit and concentricity.
Keep clearance requirements in mind: guiding components should allow reliable motion without binding, while maintaining alignment under load.
Because L is fixed by the provided range (no per-length customization stated), select the closest length that fits your ejector stroke packaging.

Frequently Asked Questions

Which steel grade (A2 vs M2) is better for ejector alignment blanks in die sets?+

This series is available in A2 or M2. A2 is typically chosen when you need a balance of wear resistance and toughness to reduce chipping risk under interrupted loads. M2 is commonly selected for applications that prioritize wear performance and longer service life where interface temperatures and sliding wear are more demanding.

How do I choose the shank diameter (D) for the center guiding in a punch/ejector system?+

Use the provided diameter options: D = 10, 13, 16, 20, 25, or 32 mm. The goal is to match the diameter of your center guidance feature (e.g., locating bore/bushing) so the blank maintains alignment without excessive play. Confirm your die tolerances so the fit supports smooth motion under ejection loads.

What length (L) range should I use when designing ejector stroke and guide engagement?+

This product is specified with L = 71 to 130 mm. Select L based on your stack-up distance from the ejector linkage to the guided working zone, including any bushings and required clearances. Using too short a length can reduce guide engagement; too long a length can cause bottom-out interference.

Does the metric center dowel ejector punch blank fit standard die set layouts?+

It is a metric center dowel style blank intended to standardize tooling dimensions in punch and ejector systems. The availability of multiple shank diameters (10–32 mm) and lengths (71–130 mm) supports compatibility with common metric die set packaging and centerline guidance schemes.

What is the main function of using a center dowel style ejector punch blank in tooling?+

The center dowel style blank provides stable center guiding and helps maintain ejection alignment between punch and die components. This reduces the risk of off-center stripping, inconsistent part release, and alignment-related wear in the guide interfaces.