7/8-1″ x 7″ ARBOR- 3-1/4″ SLEEVE EXPANDING MANDREL 2 PIECE KIT (3902-3058)

7/8-1″ x 7″ ARBOR- 3-1/4″ SLEEVE EXPANDING MANDREL 2 PIECE KIT (3902-3058) (SKU: 3902-3058)

7/8 to 1″ Expanding Mandrel Set with 7″ Length of Arbor and 3-1/4″ Length of Sleeve

• 2 pieces per set
• Made of 64Mn high grade tool steel
• Precision ground and heat treated for maximum concentricity and holding power
• Arbor hardness is HRC55-60 and sleeve is HRC44-48
• Center holes are ground and lapped
• The automatic expansion feature can be utilized on any bore (standard or non-standard) within the range of the mandrel
• Arbors are tapered and sleeves are flexible
• Size is obtained by moving the sleeve along the arbor

Specifications

• 7/8 to 1″ Expanding Mandrel Set with 7″ Length of Arbor and 3-1/4″ Length of Sleeve
• 2 pieces per set.
• Made of 64Mn high grade tool steel.
• Precision ground and heat treated for maximum concentricity and holding power.
• Center holes are ground and lapped.
• The automatic expansion feature can be utilized on any bore (standard or non-standard) within the range of the mandrel.
• Arbors are tapered and sleeves are flexible.
• Size is obtained by moving the sleeve along the arbor.
• Arbor hardness is HRC55-60 and sleeve is HRC44-48.
• Weight: 1.1
• Dimensions: L 3, W 1, H 6

Benefits

• Industrial-grade tooling designed for dependable shop performance.
• Supports consistent results when applied with correct setup practices.
• A practical choice for U.S. machine shops and maintenance work.

Recommended use

• Confirm compatibility (size, interface, machine capacity) before ordering.
• Follow safe operating practices and use appropriate PPE.
• Optimize setup rigidity and process parameters for best results.

USA Warehouse Stock — Fast U.S. fulfillment.