SKD11 Equivalent Fixing Bolt Punch Holders

This fixing bolt punch holder is used in progressive and compound punching toolsets where the punch must be held rigidly for repeatable hole dimensions. In automotive bracket and sheet-metal connector punching, the stable bolt-fix style helps maintain punch position through long runs, reducing drift that can affect trim quality and burr height.

For industrial electronics housings and other thin-gauge parts, it supports consistent punch alignment for round or shaped punch profiles. The SKD11 Equivalent construction is suited to punching because it balances wear resistance with enough toughness to tolerate vibration and intermittent shock loads.

Engineers choose this variant when they need tool compatibility across multiple outer sizes (V 16–40 mm and H 8–25 mm) while matching the punch diameter range (D 3–16 mm). The design is intended to keep punch seating secure, supporting stable production and lowering maintenance downtime.

The holder uses SKD11 Equivalent steel, commonly aligned with AISI D2-class performance for tooling applications. SKD11 Equivalent provides high wear resistance at cutting and rubbing interfaces, which is critical for punching operations where the punch holder experiences repeated contact and micro-impact.

• Heat treatment state: typically delivered in a hardened and tempered condition suitable for die and punch components (confirm on the specific lot documentation if you require a target HRC).
• Hardness / wear vs. toughness trade-off: hardened SKD11-type steels provide strong abrasion resistance but can be less shock-tolerant than tougher grades when heavily loaded or when tool alignment is poor.
• Manufacturing process: produced by steel machining to the specified outer geometry, followed by heat treatment to achieve the hardened structure and service hardness.

If higher shock toughness is required, designers sometimes compare SKD11-class steels with higher-toughness tooling grades; however, the supplied SKD11 Equivalent is the intended balance for long punching life and dimensional stability.

Correct selection starts by matching the holder to both the punch type and the required punch diameter (D). Choose Specification as For round punch or For shaped punch, then select a variant where D fits your punch diameter: 3, 3–4, 4–6, 8–10, 10–13, or 13–16 mm.

Next, verify the holder outer shape dimensions against the tool block/holder pocket: V (16, 18, 25, 28, 35, 40 mm) and H (8, 10, 13, 16, 20, 25 mm). The length is provided as L = 16–30 mm, with LC (full length alteration) ranging 16.1–29.9 mm; these should align with the punch stick-out and seating length requirements.

• Tolerance/fit: ensure your punch holder cavity and punch seating faces are machined to maintain consistent contact and bolt clamping stability.
• Configurable vs. fixed: V, H, D, and specification are variant-dependent; L and LC are set by the selected model within the stated ranges.