IS-3

TURNING TOOL

PLAIN TURNING TOOL WITH CARBIDE BACKREST

1. Sharpen the cutting tool on end only with 20° front angle as shown in Fig. 1. This will produce a 10° top rake, since the tool is mounted at 10° in the angular cutter holder (Pt. #3). NOTE: Tool can be converted to quick change carbide inserts by using Tangi-Square or rectangular insert tool bit type holders instead of H.S.S. tool bits. (See Fig. 1A)

2. Assemble the cutting tool into the angular cutter holder, being sure to keep the space above and below the toolbit parallel.

3. Loosen clamp screw, (Pt. #5), slightly and rotate angular cutter holder until cutting tool is set to the approximate work diameter desired and for the correct direction of rotation. Then lock clamp screw.

4. Adjust cutting tool up or down to center of work and tangent to diameter desired as shown in Fig. 2.

5. Feed tool onto the stock, by advancing the turret forward.

6. Make finer cutting tool adjustment, by use of the two part #7 tool adjusting screws which hold the cutting tool, until exactly the required diameter is obtained.

 

7. Bring the carbide backrest, (Pt. #9), into position by loosening the clamp screw and rotating the complete carbide backrest holder, (Pt. #4), for coarse adjustment (be certain the backrest is set about 1/64" to 1/32" behind the cutting edge of the tool.) Then lock clamp screw. Backrests can also be set ahead of cutting tool to support on stock diameter when required.

8. Make fine adjustments by use of the two Pt. #7 tool adjusting screws, so that both faces of the carbide backrest rest lightly on the diameter just turned.

9. Care should be taken to get a smooth cut before adjusting the backrest, since the backrest will not produce a smooth finish on a surface that is not properly turned.

10. On long, slender work, where there is a tendency for the stock to spring away from the tool while setting for the required size, it is advisable to feed only a short length, and set the tool as outlined above.

11. On jobs requiring a radius, instead of a sharp corner, it is necessary to set the backrest back far enough so that it rests on the straight part of the work instead of on the radius. (See Fig. 3.)

12. The R&L Turning Tool can be easily changed for right or left hand cut as shown in Fig. 4 and Fig. 5.