PRO-SERIES HIGH ACCURACY ER-20 13/32″ SPRING COLLET (3901-5189)

PRO-SERIES HIGH ACCURACY ER-20 13/32″ SPRING COLLET (3901-5189) (SKU: 3901-5189)

Pro-Series High Accuracy ER-20 13/32″ Spring Collet (3901-5189)

• AA Grade
• 5 Micron
• Superior finish
• Runout is less than or equal to .0002″
• Made of high grade SUJ2 steel
• Hardened and precision ground to 44-48HRC
• Exceeds Federal Specifications
• Major diameter is .830″
• Overall length is 1.230″
• Inside diameter is ground to reach mirror finish increasing grip force
• Surface treated to reduce rust and improve hardness
• Cryogenic treatment to significantly increase wear resistance
• Collet must be assembled into collet chuck nut before inserting into the collet chuck

Specifications

• AA Grade.
• 5 Micron.
• Superior finish.
• Runout is less than or equal to .0002″.
• Made of high grade SUJ2 steel.
• Hardened and precision ground to 44-48HRC.
• Exceeds Federal Specifications.
• Major diameter is .830″.
• Overall length is 1.230″.
• Inside diameter is ground to reach mirror finish increasing grip force.
• Surface treated to reduce rust and improve hardness.
• Cryogenic treatment to significantly increase wear resistance.
• Collet must be assembled into collet chuck nut before inserting into the collet chuck.
• Weight: 0.2
• 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.