Precise 3/4″ – 7/8″ Expanding Mandrel – 3902-3056

• Made of 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 no-standard) within the range of the mandrel.
• Sizes up t 1″ capacity are furnished with 1 sleeve: larger sizes are furnished with 2 sleeves (1 large and 1 small).
• Arbors are tapered , sleeves are flexible and size is obtained by moving sleeve along arbor.
• A range from 1/2″ thru 2″ by .0001″ can be covered by a total of 8 mandrels.

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