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What is the taper of BT40 toolholder

March 01, 2021
1. What are the models of BT40 toolholder?
There are many BT40 toolholder models. In addition to the differences in types and models, there are also differences in accuracy. If the runout accuracy is within 0.002mm, the runout accuracy is between 0.001mm and 0.005mm. The requirement is not high, the jumping accuracy is 0.008mm, and the price is relatively cheaper.

The commonly used models can be divided into the following types:
There are 14 types of bt40er elastic toolholder: bt40-er16-70, bt40-er16-100, bt40-er16-150, bt40-er20-70, bt40-er20-100, bt40-er20-150, bt40-er25-70, bt40-er25-100, bt40-er25-150, bt40-er32-70, bt40-er32-100, bt40-er32-150, bt40-er40-100, bt40-er40-150.

There are 7 types of bt40-sk high-speed toolholder: bt40-sk6-60, bt40-sk6-90, bt40-sk10-60, bt40-sk10-90, bt40-sk16-60, bt40-sk16-90, bt40-sk25-90.

There are 10 types of bt40ger high-speed toolholder: bt40-ger16-70, bt40-ger16-100, bt40-ger20-70, bt40-ger20-100, bt40-ger25-70, bt40-ger25-100, bt40-ger25-150, bt40-ger32-70, bt40-ger32-100, bt40-ger32-150.

There are five types of BT40 powerful toolholder: bt40c20-105, bt40c25-105, bt40c32-105, bt40c32-135, bt40c32-165.
2. What is the taper of BT40 toolholder?
There are several national standards for the toolholder of machining center. There are usually five standards and specifications for the 7:24 taper toolholder, namely NT (traditional type), DIN 69871 (German standard), IS0 7388 / 1 (International Standard), MAS BT (Japanese standard) and ANSI / ASME (American Standard).

BT is Japanese standard (mas403), taper is 7:24, size specifications are 30, 40, 50, 60. BT40 toolholder "40" represents the taper section diameter of the toolholder.
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8613705473076

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