The common specification of the shank is 30, 40, and 50, it is the diameter at somewhere of the taper shank. Toolholders are available in various gauge lengths.

For highest precision and best results, the total system counts. For that reason, all our components (collets, clamping nuts and toolholders) are carefully matched to fit together. This guarantees lowest T.I.R. and maximum balancing. For best manufacturing results and longest tool life, please use our toolholders together with our collets and clamping nuts only.

As a specilized manufacturer of machine tool accessories, QuFu ChongDe Precision Machinery Co., Ltd has many years mature experience on how to make precision shank. We can provide various kinds of shank, such as ER shank set, SK shank set, NT/R8 collet shank, MTA/B Morese shank, C Straight shank (A/M type), BT/NT Needle Roller Type Milling Chuck, BT/FMA/B/C Face Mill Arbors, CAT40-SLN End Mill Adapters etc. The material is fine spring steel: 20CrmnTi, the hardness is HRC50-54 and the precision is 3v or 5v. With unique process technology, we ensure the appearance nice and the stability strong, the quality has reached the standard of BT-403 and DIN69871, so they can be widely used on the numerical contral machines with high precision high speed and high stability and balance, so they can meet various demands of different customers. ChongDe Machinery will go on holding the belief of "Customers First, Quality Crucial" and try our best to provide the best products to everyone around the world!