Arbor Bolt Kit

Description

What Is an Arbor Bolt Kit for Molders?

The Arbor Bolt Kit for Molders is a factory replacement hardware set used to secure molding knives to the arbor on Williams & Hussey molders. These bolts replace the screws that hold the knives firmly in position during operation. The proper arbor bolt kit ensures safe cutting performance and consistent molding quality.

This kit is most commonly ordered as a replacement part when arbor bolts or the original Allen wrench are lost, damaged, or worn from extended use.

What’s Included

• Eight (8) arbor bolts – 3/8-16 x 1″
• One (1) Allen wrench – 7/32″

Everything needed to correctly secure a full set of knives to the arbor is included in one kit.

Proper Knife Tightening Torque

One of the most common questions we receive is: How tight should the knives be tightened?

Recommended torque: 30 ft-lbs (foot-pounds)

Tightening the arbor bolts to 30 ft-lbs ensures:

• Secure knife retention during operation
• Reduced risk of knife movement or vibration
• Proper force without damaging threads or components

Over-tightening can damage bolts or the arbor, while under-tightening can allow knives to shift—both of which can affect finish quality and safety.

Installation Reference: Attaching Profile Knives to the Arbor

Proper arbor bolt torque is only part of correct knife installation. The video below shows how to attach a genuine Williams & Hussey profile knife to the arbor, including knife positioning and tightening technique.

This video is intended as a visual reference when installing or replacing arbor bolts and securing knives before operation.

Recommended For

• Replacing lost or damaged arbor bolts
• Shops missing the original Allen wrench
• Routine maintenance and service of Williams & Hussey molders
• Ensuring proper knife security after knife changes

Why Use the Factory Arbor Bolt Kit for Molders?

• Designed specifically for Williams & Hussey molder arbors
• Correct bolt sizing and thread engagement
• Ensures proper knife clamping force when torqued to specification
• Eliminates guesswork compared to generic hardware

Using the correct arbor bolts helps maintain safe operation, extend component life, and preserve molding accuracy.