Jigs, Tools and Fixtures, Their Drawing and Design; (Covering Equipment for Practically All Modern Machine Tools, with Chapters on Special Equipment a

 
9781235883002: Jigs, Tools and Fixtures, Their Drawing and Design; (Covering Equipment for Practically All Modern Machine Tools, with Chapters on Special Equipment a

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...of gripping the stop-screw B should not be forgotten. The body of the holder should be hardened, and both this and the coned mouth ground, making them both concentric and well finished. The cap A is of the same material as the body, and, as it is subject to hard wear, should also be hardened. The collet Bx should be made as long as possible, so as to give a good bearing surface and a better grip. The practice of splitting it into separate segments should be avoided, but if the reader has ever attempted to find a small part of a tool among the oil and "swarf" in the machine bed this warning will not be necessary. Bushes for Holders.--These unimportant-looking pieces go a long way towards making a successful holder and are worth a little consideration. The one shown at A, Fig. 52, is split through one side and partly through the other, and the bottom of the slot is in the form of a radius to prevent the bush breaking. The one at B has two splits, one opposite the other, both commencing at opposite ends and finishing a short distance from the other end. With very large bushes a number of slots are introduced in a similar manner. The bush c is, in the writer's opinion, the Dest, having a hole drilled half-way through clearance size for the holder screw, which grips positively on the tool itself, a small flat bsing ground thereon to assist this. The flange on the bush is also of assistance when it is being removed from the holder, a point much appreciated by tool setters. Where the holder screw binds direct on to the bush, the latter should always be provided with a flat, otherwise the burrs thrown up by the continual tightening of the screw will make it impossible to remove the bush when necessary. Floating Holders.--The object of this type of holder ...

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Philip Gates
Published by RareBooksClub
ISBN 10: 1235883000 ISBN 13: 9781235883002
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Book Description RareBooksClub. Paperback. Book Condition: New. This item is printed on demand. 48 pages. Dimensions: 9.4in. x 7.2in. x 0.2in.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: . . . of gripping the stop-screw B should not be forgotten. The body of the holder should be hardened, and both this and the coned mouth ground, making them both concentric and well finished. The cap A is of the same material as the body, and, as it is subject to hard wear, should also be hardened. The collet Bx should be made as long as possible, so as to give a good bearing surface and a better grip. The practice of splitting it into separate segments should be avoided, but if the reader has ever attempted to find a small part of a tool among the oil and swarf in the machine bed this warning will not be necessary. Bushes for Holders. --These unimportant-looking pieces go a long way towards making a successful holder and are worth a little consideration. The one shown at A, Fig. 52, is split through one side and partly through the other, and the bottom of the slot is in the form of a radius to prevent the bush breaking. The one at B has two splits, one opposite the other, both commencing at opposite ends and finishing a short distance from the other end. With very large bushes a number of slots are introduced in a similar manner. The bush c is, in the writers opinion, the Dest, having a hole drilled half-way through clearance size for the holder screw, which grips positively on the tool itself, a small flat bsing ground thereon to assist this. The flange on the bush is also of assistance when it is being removed from the holder, a point much appreciated by tool setters. Where the holder screw binds direct on to the bush, the latter should always be provided with a flat, otherwise the burrs thrown up by the continual tightening of the screw will make it impossible to remove the bush when necessary. Floating Holders. --The object of this type of holder . . . This item ships from La Vergne,TN. Paperback. Bookseller Inventory # 9781235883002

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