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Description of BS 1660-1:1992 1992This International Standard specifies the dimensions of self-holding tapers for tool shanks with a small taper of about 4 % to 5 %, classified, according to their use, into the three following catergories:
For the first category, tapers recommended by ISO are Nos. 1 to 6 Morse tapers. Their standard sizes in millimetres are given in Table 2, and the corresponding sizes in inches are given in Table 3. For smaller and larger tapers, those recommended by ISO are, on the one hand, Nos. 4 and 6 metric 5 % tapers and No. 0 Morse taper, and on the other hand, Nos. 80 to 200 metric 5 % tapers, the sizes of which, in millimetres only, are given in Table 2. However, it was agreed to include in parallel, in the category of small tapers, Nos. 1 to 3 Brown & Sharpe tapers, the sizes of which, in inches only, are given in Table 3. Consequently, as shown in Table 1, the self-holding tapers dealt with in this International Standard include
Table 1 – Tapers
This International Standard provides, for those elements which are threaded, two entirely distinct types of product according to the type of thread, M or UNC. In order to distinguish between those two types, it is important that the element itself be marked with the corresponding thread symbol and the type of taper symbol, as shown in the figures in clause 4. Lastly, this International Standard specifies the dimensions of grooves and holes necessary for the design of tapers for applications where coolant supply is required. Specifies dimensions of tapers for use on small tools where the tools may be used in applications with or without coolant supplies.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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