Bolts and nuts, plates, and chucks, which are employed for planing, are represented in Plate 47. Apparatus of this class are required for all planing-machines, whether they are small shavers like the one in Plate 35, or large machines for work of fifteen or twenty feet in length, represented in Plate 48. Auxiliary implements for planing differ from each other in size only, therefore each machine has bolts of a suitable diameter and length for the table, and for the character of the planing to be done with the machine. Consequently, screw-bolts for planing-machines have diameters varying from a quarter of an inch in diameter to about an inch and a quarter, which is about the thickest in use, except for special work to be afterwards mentioned.

Plate 47

The bolts and nuts required for small planing-machines are shown by Figs. 633, 634, and 637; these are of all lengths from two inches to two feet. Bolts for large work, arc indicated by Figs. 634, 635, 636, and 637, the tee-head bolts being much oftener used than others, because some of the slots in a planing-table are tee-shaped, and also because a tee-head bolt is capable of being put through the table-slot from the face-side, whether the slot is tee-shaped, or of any other form. The lengths of bolts for large work are from five or six inches to ten or twelve feet. Every tee-head bolt should be provided with a narrow groove filed across the screw extremity, termed the point, with the length of the cut or groove parallel to the length of the bolt's head; this will enable the operator to know the position of the head in the table while placing and tightening the bolt.