Metric Tapped Punch Blanks for Bolt-Fixed Punches

Q: What shank diameter tolerance is provided for bolt-fixed assembly, and how does it affect punch holder fit?

The shank diameter D is finished to +0.005/0 with an m5 tolerance reference. When selecting the blank, match D = 5 ~ 25 mm to the punch holder bore/seat requirement so the tool assembles consistently. Because the tolerance is referenced, avoid oversizing holder features that would reduce locating repeatability.

Q: Which material should I choose between SKD11 (D2 equivalent) and SKH40 (powder HSS) for punch blanks?

This series is offered in SKD11 equivalent (D2) or SKH40 equivalent (powdered high-speed steel) . Use SKD11 (D2 equivalent) when you want strong wear resistance and dimensional stability for typical stamping conditions. Choose SKH40 when you expect higher cutting demand and want the benefits of powdered HSS construction. Material impacts edge durability and wear rate, so select based on duty cycle and expected wear.

Q: How do I select the correct blank length L and LC for my press tool layout?

Available L ranges are 40 ～ 80 mm or 40 ～ 100 mm . The LC (full length alteration) is also configuration-dependent, with available ranges such as 20 ～ 79.9 , 20 ～ 99.9 , or 42 ～ 99.9 . Use your holder depth and required tool stick-out to pick L first, then confirm LC to ensure the modified length fits within the press assembly envelope.

Q: What tap standard type options are available, and how do they relate to punch diameter usage?

Options include tapped large-diameter type and tapped extra-large diameter type , alongside tap standard type selections. These are intended for applications using punch diameters in the 5 to 25 mm range, so choose the tap type that matches your punch diameter and the bolt-fixed thread interface. Ensure your tap standard aligns with the holder/punch design to avoid thread mismatch.

Q: Are these blanks pre-machined and heat-treated, or do they require post-machining before assembly?

They are supplied as pre-cut, heat-treated blanks with the shank diameter finished to tolerance for reliable tool assembly. This reduces or eliminates on-site machining typically required to create a bolt-fixing-ready tool shank. If your application requires additional geometry beyond the supplied dimensions, you should verify compatibility of the modified regions with the existing heat-treated profiles.

Metric tapped punch blanks for bolt-fixed punches are pre-cut, heat-treated blanks designed for punch tools secured with bolts. The shank diameter is machined to the specified tolerance to support consistent fit and stable performance in press assemblies.

Pre-cut blank stock for bolted punch fixing, reducing on-site machining time
Heat-treated construction for durable cutting tool service life
Finished shank diameter to +0.005/0 with m5 tolerance reference
Tap standard type options for 5 to 25 mm punch diameter applications

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Specifications

84 configurations available

Material	Shank diameter D tolerance	D (Shank diameter) (mm)	L (L dimension) (mm)	Specification	LC (Full length alteration) (mm)	type
SKD11 Equivalent (D2)	+0.005/0	5	40 ～ 80	Tap standard type	-	-
SKD11 Equivalent (D2)	+0.005/0	5	-	Tap standard type	20 ～ 79.9	-
SKD11 Equivalent (D2)	+0.005/0	6	40 ～ 80	Tap standard type	-	-
SKD11 Equivalent (D2)	+0.005/0	6	-	Tap standard type	20 ～ 79.9	-
SKD11 Equivalent (D2)	+0.005/0	8	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	+0.005/0	8	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	+0.005/0	10	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	+0.005/0	10	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	+0.005/0	13	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	+0.005/0	13	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	+0.005/0	16	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	+0.005/0	16	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	+0.005/0	20	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	+0.005/0	20	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	+0.005/0	25	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	+0.005/0	25	-	Tap standard type	20 ～ 99.9	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	5	40 ～ 80	Tap standard type	-	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	5	-	Tap standard type	20 ～ 79.9	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	6	40 ～ 80	Tap standard type	-	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	6	-	Tap standard type	20 ～ 79.9	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	8	40 ～ 100	Tap standard type	-	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	8	-	Tap standard type	20 ～ 99.9	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	10	40 ～ 100	Tap standard type	-	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	10	-	Tap standard type	20 ～ 99.9	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	13	40 ～ 100	Tap standard type	-	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	13	-	Tap standard type	20 ～ 99.9	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	16	40 ～ 100	Tap standard type	-	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	16	-	Tap standard type	20 ～ 99.9	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	20	40 ～ 100	Tap standard type	-	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	20	-	Tap standard type	20 ～ 99.9	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	25	40 ～ 100	Tap standard type	-	-
SKH40 Equivalent (Powdered high-speed steel)	+0.005/0	25	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	m5	5	40 ～ 80	Tap standard type	-	-
SKD11 Equivalent (D2)	m5	5	-	Tap standard type	20 ～ 79.9	-
SKD11 Equivalent (D2)	m5	6	40 ～ 80	Tap standard type	-	-
SKD11 Equivalent (D2)	m5	6	-	Tap standard type	20 ～ 79.9	-
SKD11 Equivalent (D2)	m5	8	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	m5	8	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	m5	10	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	m5	10	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	m5	13	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	m5	13	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	m5	16	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	m5	16	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	m5	20	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	m5	20	-	Tap standard type	20 ～ 99.9	-
SKD11 Equivalent (D2)	m5	25	40 ～ 100	Tap standard type	-	-
SKD11 Equivalent (D2)	m5	25	-	Tap standard type	20 ～ 99.9	-
SKH40 Equivalent (Powdered high-speed steel)	m5	5	40 ～ 80	Tap standard type	-	-
SKH40 Equivalent (Powdered high-speed steel)	m5	5	-	Tap standard type	20 ～ 79.9	-

Product Guide

🏭Application Scenarios+

These metric tapped punch blanks are used as the prepared cutting-tool starting point for bolt-fixed punch assemblies. In press tooling, the machined shank provides a stable interface to the punch holder, helping maintain alignment and repeatable cutting performance over repeated cycles.

Scenario examples include automotive and appliance stamping, where tapped punch diameters in the 5 to 25 mm range are commonly selected for consistent hole or slot formation in formed sheet parts. The pre-cut, heat-treated blank format reduces fixture time versus cutting and threading from raw bar stock.

Connector and bracket piercing: bolt-fixed retention benefits from the finished shank diameter tolerance for reliable tool assembly.
Medical and lab enclosure punching: controlled dimensions help reduce tool wear variability when producing small features.
General industrial stamping: choose tapped large or extra-large diameter types for threads suited to higher cutting loads.

🔧Material & Process Details+

The blanks are available in SKD11 equivalent (D2) for high wear resistance and dimensional stability, and SKH40 equivalent (powdered high-speed steel) for improved cutting performance in demanding conditions. Both options are provided as heat-treated, pre-cut blanks, meaning the material has already been processed for service-ready tool life.

Hardness and trade-offs: D2-type steels (SKD11 equivalent) generally balance hardness with toughness, offering strong wear resistance for many stamping applications. SKH40 (powder HSS) typically emphasizes cutting edge performance and red-hardness characteristics, but may be less forgiving under severe impact compared with more impact-tough alloys.

SKD11 (D2 equivalent): wear-focused tool steel for stable, repeatable punch cutting.
SKH40 (powder HSS): optimized for higher cutting demand and edge durability.

Material choice should be matched to the tooling load, expected wear rate, and press duty cycle.

📐Sizing & Selection Guide+

Select the blank based on the required shank diameter D, then confirm the overall L dimension and the thread-related length alteration LC. The shank diameter range is D = 5 ~ 25 mm, with shank diameter finished to +0.005/0 and a reference m5 tolerance. This finished tolerance supports reliable fit in bolt-fixed punch holders.

Typical matching steps for cavity/core interface and assembly:

Choose the blank with D equal to the holder requirement (within the provided shank diameter tolerance).
Select L from the available ranges: 40 ～ 80 mm or 40 ～ 100 mm, ensuring sufficient stick-out and support length in the press tool.
Verify LC (full length alteration) fits the design envelope; available values include 20 ～ 79.9, 20 ～ 99.9, or 42 ～ 99.9 depending on configuration.

Thread standard type options (tapped large-diameter and tapped extra-large diameter) must align with your bolt-fixed punch interface and tap requirements for the target punch diameter.

Frequently Asked Questions

What shank diameter tolerance is provided for bolt-fixed assembly, and how does it affect punch holder fit?+

The shank diameter D is finished to +0.005/0 with an m5 tolerance reference. When selecting the blank, match D = 5 ~ 25 mm to the punch holder bore/seat requirement so the tool assembles consistently. Because the tolerance is referenced, avoid oversizing holder features that would reduce locating repeatability.

Which material should I choose between SKD11 (D2 equivalent) and SKH40 (powder HSS) for punch blanks?+

This series is offered in SKD11 equivalent (D2) or SKH40 equivalent (powdered high-speed steel). Use SKD11 (D2 equivalent) when you want strong wear resistance and dimensional stability for typical stamping conditions. Choose SKH40 when you expect higher cutting demand and want the benefits of powdered HSS construction. Material impacts edge durability and wear rate, so select based on duty cycle and expected wear.

How do I select the correct blank length L and LC for my press tool layout?+

Available L ranges are 40 ～ 80 mm or 40 ～ 100 mm. The LC (full length alteration) is also configuration-dependent, with available ranges such as 20 ～ 79.9, 20 ～ 99.9, or 42 ～ 99.9. Use your holder depth and required tool stick-out to pick L first, then confirm LC to ensure the modified length fits within the press assembly envelope.

What tap standard type options are available, and how do they relate to punch diameter usage?+

Options include tapped large-diameter type and tapped extra-large diameter type, alongside tap standard type selections. These are intended for applications using punch diameters in the 5 to 25 mm range, so choose the tap type that matches your punch diameter and the bolt-fixed thread interface. Ensure your tap standard aligns with the holder/punch design to avoid thread mismatch.

Are these blanks pre-machined and heat-treated, or do they require post-machining before assembly?+

They are supplied as pre-cut, heat-treated blanks with the shank diameter finished to tolerance for reliable tool assembly. This reduces or eliminates on-site machining typically required to create a bolt-fixing-ready tool shank. If your application requires additional geometry beyond the supplied dimensions, you should verify compatibility of the modified regions with the existing heat-treated profiles.