Punch Holders - Double Fixing Bolt

This double-bolt punch holder is used in progressive and transfer die sets where punch tools must remain precisely seated under repeated impact. The double fixing bolt arrangement improves resistance to loosening, which helps maintain punch alignment and reduces the risk of mis-punching in high-cycle production.

Automotive and appliance stamping: When heavy-load punches repeatedly drive through thick materials, the stable tool retention supports consistent stroke accuracy and lowers punch wear by keeping the punch axis properly aligned.

Standard metal-forming dies: For general production punches, it provides controlled seating while still allowing selection of the appropriate outer shape size to match the die layout and tool spacing.

Multi-station progressive tooling: Because alignment must be maintained across stations, precision-machined fit reduces lateral shifting during operation. Choose this variant when you need dependable punch guidance for both standard and heavy-load punch applications.

The punch holder is manufactured from steel and precision-machined to maintain consistent fit and seating accuracy. While the exact steel grade and hardness are not specified in the provided data, the steel construction is intended to offer high rigidity to prevent misalignment under load.

Material performance focus:

• Wear resistance: Steel provides durable bearing and contact behavior for repeated punch tool seating.
• Toughness vs. hardness trade-off: Increasing hardness can improve wear, but excessive brittleness can reduce shock resistance under impact loads—steel holders are selected and processed to balance these demands for stamping tools.
• Heat treatment (expected use): Punch tooling components are commonly supplied either pre-hardened or quenched & tempered to stabilize dimensions; verify the exact heat-treatment state with your supplier if you have a hardness requirement.

If alternative steel grades are available for different load classes, select the harder option for abrasion-dominant service and the tougher option for heavier impact.

Correct sizing ensures proper punch seating, alignment, and secure retention. Use the specified punch diameter ranges to select the right holder for your tool: D can be 8–10 mm, 10–13 mm, 10–16 mm, or 13–20 mm.

Match the holder geometry to the die/tooling pocket:

• Fixed L (length) is 25–30 mm.
• Outer shape dimensions are selectable as V = 40, 50, 55, 60 mm and H = 20, 25, 30 mm to fit the surrounding die block and clearance requirements.
• LC (full length alteration) is available across 15.6–29.9 mm, 11.1–29.9 mm, 13.1–29.9 mm, or 18.6–29.9 mm depending on the configuration—choose the LC range that matches your punch/tool length stack-up.

Fit and tolerance: Maintain the required seating interface tolerance between punch and holder to minimize lateral play; confirm your press/die tolerances and any guidance features before final lock-up. Select the configuration labeled for standard punch or heavy-load punches based on expected forming force and impact severity.