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- MAASS - Dual Rotary Drive Ring Shoes
MAASS - Dual Rotary Drive Ring Shoes
Precision machined from domestic 4140 high alloy material, heat treated to high of 36RC. Tungsten carbide inserts press fit into the outside of shoe, improving hole cleaning and rate of penetration. Milled pockets provide relief from residual stresses. High stress areas are hard welded to 65RC to improve durability. Manufactured in North Americadeeeeee. Available in 3' through 18 ' sizes.
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