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Your cart is empty."HHIP 9/16 to 21/32"" Expanding Mandrel Set with 6"" Length of Arbor and 2-3/4"" 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."
Candy Lover
Reviewed in the United States on November 10, 2021
It's an expanding mandrel. good surface hardness, was unmarred using it with annealed 4140 steel. locks well and square in a machined bore. Got the job done for me. Best advice is to turn between centers with a dog. There's not much of a non tapered end to grab on to. Between centers with a bit of tapping got me
William H. Pardee Sr.
Reviewed in the United States on September 4, 2020
works well easy to use
Koi farmer
Reviewed in the United States on March 31, 2020
TIR runout zero to .0001 highly recommend this tooling.
Orcinus24x5
Reviewed in Canada on April 6, 2017
Finishing could be a bit better. After hardening and grinding, there were a lot of burrs that were not removed. Some of these burrs could interfere with the fit of the sleeve on the arbor, or the part on the sleeve, and introduce runout. The price is pretty good though. I just wish more sizes were available. I have 1/2"-9/16" and 9/16"-21/32" and would like to complete this set up to 1" or at least 7/8" but the sizes required have been out of stock for many months.
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