Major types of mandrels
1. Expanding Mandrels
2. Plain Mandrels
3. Nut Mandrels
1. Expanding Mandrels Expanding mandrel have of a hard tapering section with a slot tapering sleeve to expand in thickness while enforced on to hard tapered mandrel. Mandrel is prepared in sets, every mandrel be able to use for a range of whole sizes. Quantity of expansion is as of about 1/16" used for the lesser size mandrels up to 1/2" used for the larger dimension mandrels. 2. Plain Mandrels Plain mandrel is hardened with tempered steel bar-holding mechanism. It is use for the advance machining of a work piece among centers once it has be bored or reamed whilst held in a chuck. Mandrel is round to taper of 0.005 inch per foot. Its press or driven into a completed hold firm sufficient thus the job will not slip as it is being machined. Mandrel range is stamped on the large ending. 3. Nut Mandrels Nut mandrel is straight mandrel, thread at one ending on which a amount of work-pieces might be mount with firmly held for turning among center.
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