M2 Steel Ball Lock Ejector Punch Blanks - Heavy Duty, Metric
Ball Lock Ejector Punch Blanks - Heavy Duty, Metric (M2 steel) are blanks for building durable ejector tooling that supports repeatable part ejection in metric press applications.
- Heavy-duty ball-lock geometry for secure retention in ejector systems
- Manufactured from M2 steel for wear resistance and stable performance
- Consistent blank form supports tight assembly and predictable ejection accuracy
- Use in metric die and punch sets where robust ejection is required
Specifications
14 configurations available
| Material | D (Shank dia.) (mm) | Jektole group | L (Length) (mm) |
|---|---|---|---|
| M2 | 10 | J4M | 63 ～ 100 |
| PS4 | 10 | J4M | 63 ～ 100 |
| M2 | 13 | J6M | 63 ～ 125 |
| PS4 | 13 | J6M | 63 ～ 125 |
| M2 | 16 | J6M | 63 ～ 125 |
| PS4 | 16 | J6M | 63 ～ 125 |
| M2 | 20 | J9M | 63 ～ 125 |
| PS4 | 20 | J9M | 63 ～ 125 |
| M2 | 25 | J9M | 71 ～ 125 |
| PS4 | 25 | J9M | 71 ～ 125 |
| M2 | 32 | J12M | 71 ～ 125 |
| PS4 | 32 | J12M | 71 ～ 125 |
| M2 | 40 | J12M | 80 ～ 125 |
| PS4 | 40 | J12M | 80 ～ 125 |
Product Guide
Application Scenarios+
These heavy-duty ball-lock ejector punch blanks are used in injection and transfer tooling where ejector retention must stay stable under repeated cycling. The ball-lock style supports secure capture in ejector systems, helping prevent punch-to-block movement that can affect ejection timing and surface finish.
- Automotive and industrial parts: Pair the metric shank sizes D = 10–40 mm with the correct ejector group to build robust ejector assemblies for housings, brackets, and connector-related components that see high repeat loads.
- Consumer electronics housings: Use the consistent blank geometry and metric lengths to support repeatable ejection accuracy while maintaining reliable retention in tighter die space.
- Packaging and appliance components: The wear-focused M2 steel variant is suited for longer runs in forming tooling where punch surfaces experience abrasion.
Across these scenarios, selecting a blank from the appropriate Jektole group (J4M, J6M, J9M, J12M) ensures mechanical compatibility with the corresponding ejector insert architecture.
Material & Process Details+
This product is offered in M2 steel (with an optional PS4 variant). M2 is a high-speed steel grade commonly associated with strong wear resistance for punch and shearing-related tooling; its typical performance trade-off is that you maintain abrasion resistance while managing brittleness risks under high edge stress.
- M2 steel: Designed for long service life in applications where the ejector punch experiences repeated contact and rubbing.
- PS4 (comparison): Provided as an alternate material option when your shop prefers a different property balance or processing route; exact hardness values are application- and supplier-dependent, so confirm based on your drawing/spec.
For both variants, blanks are manufactured in a hardened/finished state suitable for forming tooling build-up, and final dimensional control is typically verified after fit machining to the ejector system.
Sizing & Selection Guide+
Choose the blank dimensions to match your mold’s ejector block and punch/cavity layout, starting with the shank diameter D and then the length L.
- Diameter selection: Select D = 10–40 mm to fit the corresponding bore and retention features of your ejector assembly.
- Length selection: Use the available ranges—e.g., L = 63–100 mm, 63–125 mm, 71–125 mm, or 80–125 mm—to achieve the required stroke clearance without bottoming out.
- Compatibility via Jektole group: Match the Jektole group (e.g., J4M, J6M, J9M, J12M) to the ejector retention geometry used in your tooling design.
Ensure your final fit accounts for standard mold assembly tolerances between the shank bore and the ball-lock retention features. If you will finish-machining the shank end, base your design on the listed ranges and verify after machining to maintain consistent ejection alignment.
Frequently Asked Questions
Which Jektole group should I choose for a ball-lock ejector assembly in metric tooling?+
Use the Jektole group that matches your ejector retention architecture: J4M, J6M, J9M, or J12M. This product provides several groups so the ball-lock geometry can align with your specific ejector system design. Select the group first, then match D (10–40 mm) and the appropriate L range for stroke requirements.
How do I select the correct shank diameter (D) and length (L) for ejector stroke clearance?+
Start with D: choose a value in the 10–40 mm range to match your ejector block bore and retention fit. Next, pick L from the available options (for example 63–100, 63–125, 71–125, or 80–125 mm) so the punch clears the part and does not bottom in the tool. After fitting, verify alignment and stroke end-of-travel to confirm clearance.
Is M2 steel the best choice for long-run wear on ejector punches?+
This series is available in M2 steel (and an optional PS4 material variant). The intent of the M2 option is reliable punch performance with strong wear resistance during repeated cycling in forming tooling. If your process emphasizes abrasion and contact persistence, M2 is typically the first candidate; however, confirm hardness and final performance requirements based on your part material and cycle loads.
What are the key fit considerations when building a ball-lock ejector system with these blanks?+
The product’s consistent blank form is meant to support predictable assembly and ejection accuracy. Fit considerations focus on matching D to the ejector retention bore and selecting the correct Jektole group so the ball-lock geometry seats correctly. After any final machining, check that the punch can move freely and retain position under repeated cycling.
Can I use these blanks for both ejector die construction and punch tooling in metric press applications?+
Yes—this series is described as a blank for building durable ejector tooling in metric press and forming tooling applications. The metric specification is reflected in the shank diameter range D = 10–40 mm and the listed length ranges. For punch-related tooling compatibility, ensure your design aligns the Jektole group and retention geometry to your system.
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