8-Piece Expandable Arbor Set – 1/4″ to 1-1/4″ Range with Allen Wrenches | Bluefox Tools

Description

This 8-piece high-precision expanding arbor set is designed for accurate internal gripping of bored components during turning, grinding, milling, and inspection operations. Ideal for machinists, tool rooms, and workshops, these mandrels provide secure concentric holding without damaging the workpiece.

Each arbor expands uniformly by tightening the expansion screw, allowing precise and repeatable clamping inside finished or semi-finished bores. Supplied complete with alloy wrenches and a wooden storage stand, this set offers both performance and convenience.

Set Includes (8 Pieces):

• 1/4″

• 3/8″

• 1/2″

• 5/8″

• 3/4″

• 7/8″

• 1″

• 1-1/4″

Key Features & Important Points:

• High-Precision Expanding Mandrels – Engineered for accurate internal holding, ensuring excellent concentricity and stability during machining operations.

• Wide Size Range Coverage – Covers bore sizes from 1/4″ to 1-1/4″, making the set versatile for a wide variety of components and applications.

• Controlled Expansion Mechanism – Loosen the expanding screw to insert, then tighten to expand the arbor up to 0.005″, providing firm and uniform grip without distortion.

• Ideal for Lathe & Milling Machines – Suitable for use on lathes, milling machines, grinders, and inspection setups, perfect for finishing and precision work.

• Secure Internal Clamping – Eliminates external clamping marks, making it ideal for finished bores, bushings, gears, sleeves, and rings.

• Durable Construction – Manufactured from high-quality steel for long service life, wear resistance, and consistent performance.

• Supplied with Alloy Wrenches – Allows quick and easy tightening or loosening of the expansion screws.

• Wooden Storage Stand Included – Keeps all mandrels organized, protected, and easily accessible in the workshop.

• Shipping Weight – Approx. 4.1 pounds, securely packed for safe transit.

Applications:

• Internal holding for turning & facing

• Precision grinding and polishing

• Milling and drilling operations

• Tool room and production work

• Inspection and measurement setups