Chapter III: Section 2: Adjusting Devices

For adjustment by Screws, see Section 78, and by Wedges, see Section 36, These are the commonest appliances employed. For Cams also, see Section 9. For adjusting Pedestal Brasses, see Section 46.

For adjustments by keys, cotters, &c., see Section 37. See also Nos. 251, 269, and 297.

=9. Split cone sleeves and set screw adjustment= for a revolving standard, or similar detail, where there is much wear or great accuracy is required in the revolving bearing.

=10. Centre-line adjustment= for lathe headstocks, &c.

=11. Variable curve adjustment;= used in compass planes, instruments for drawing arcs of circles, &c.

=12. Vertical shaft footstep adjustment;= employed on millstones, horizontal grinding mills, &c., to regulate the space between the grinding surfaces. See No. 261.

=13. Side screw adjustment= for injectors, jet pumps, &c.

=14. Levelling adjustment;= can be used with either 3 or 4 screws: for telescope and level stands, theodolites, &c.

=15. Horizontal central adjustment= for footsteps, &c.

=16. Slotted link and lock nut= for adjusting angle of a lever.

=17. Disc and ring= with partial angular adjustment by a screw and nut; used for screwing dies, self-centering chucks, &c. The nut and bearing of the screw have allowance for swivelling.

=18. Pin and hole adjustment= for a lever or similar detail.

=19. Wedge bearing= for locomotive horn plate guides, slide bars, and similar parts subject to wear.

=20. Right and left-hand screw and wedge adjustment= for roller bearings, &c.

=21. Adjustment for wear= used on engine crossheads to take up the wear of the working faces.

Adjustable Crane Balance Weights, Section 18.

Adjustable ~V~-guides, Nos. 700 and 704.