ACCU-SET ROLLER BACKREST
TURNING TOOL
IS-1

1. With H.S.S. Cutting Tool Slide
Chip breaker provides automatic recentering of H.S.S. cutting tool - conventional center setting shoulder too.
2. With Tangi-Square Carbide Insert Slide
Square Micro-Grain carbide insert cuts tangentially, has built in chip breaker and 4 cutting edges.
3. With Rectangular Carbide Insert Slide
Rectangular carbide insert cuts tangentially for sharp, square corners and better size control and finish.
4. With Triangular Carbide Insert Slide
Triangular carbide insert cuts radially for maximum stock removal and tool life.

TO INTERCHANGE CUTTING TOOL SLIDES:

Unscrew Tool Slide Lock Screw (Pt. #10), remove tool slide, replace with desired tool slide leaving Slide Plate (Pt. #27) in position, then reinsert lock screw and proceed as per following instructions for tool slide being used. Be certain that adjusting stud is properly engaged in slide plate. Also be certain that slot in slide plate is engaged with flange of micrometer screw.

DIAMETER TURNING WITH TANGI-SQUARE CARBIDE 
INSERT
TOOL SLIDE AND STANDARD ROLLER BACKRESTS

(1) Install Tangi-Square Carbide Insert into slide pocket and lock in place by tightening Insert Screw (Pt. #17). Be sure pocket is free of chips and dirt.

(2) Tool Slide should then be set to approximate centerline by rotating Adjusting Stud (Pt. #28) until top surface of cutting tool lines up with a scale held against the small shoulder on the face of the rear Roller Block (Pt. #4). Be sure to slightly loosen Adjusting Stud Lock Screw (Pt. #29) and Tool Slide Clamp Screw (Pt. #10) before making any adjustments and retighten them securely after adjustment is made. (Note: this centerline adjustment is only approximate and will more than likely have to be adjusted for any machine misalignment. This can only be done when tool is actually mounted and cutting on the machine.)

(3) Loosen Slide Lock Screw (Pt. #10) slightly and adjust cutting tool slide in or out to approximate diameter desired by turning Micrometer Screw (Pt.#9). Then retighten slide lock screw securely.

(4) Loosen Roller Lock Screw (Pt. #11) only enough so that slides move when you turn Roller Block Adjusting Screws (Pt. #31). Then move both roller blocks back out of the way so that they do not contact the diameter to be turned.

(5) With spindle turning advance tool into end of bar a slight distance and check diameter. Readjust tool slide in or out and up or down for cutting on center until correct diameter is obtained as per instruction (3) above. To simplify adjustments each line on micrometer screw equals .004" (1MM) on diameter or .002" on the side.

(6) Turn both Roller Block Adjusting Screws (Pt. #31) to adjust roller blocks until they contact the diameter being turned and spin when the part is revolved. Then tighten Lock Screw (Pt. #11) securely.

(7) Make a few test cuts, being sure BOTH rolls revolve with work. Repeat these operations until turned diameter and cutting action is as required.

The rolls may also be used to produce a burnished finish on the turned diameter by exerting extra pressure on them. However this should not be overdone since it may damage the turning tool, or cause tapers or other problems with the part itself.

NOTE: High Top Rake Tangi-Square Inserts are available for turning stainless steel and other difficult to machine materials. Also inserts with .015" corner radius are available for special applications.

DIAMETER TURNING WITH RECTANGULAR CARBIDE INSERT TOOL SLIDE

(1) Loosen Carbide Insert Clamp (Pt. #25) by turning Carbide Insert Clamp Screw (Pt. #26) and install Rectangular Carbide Insert (Pt.#18) into pocket and tighten with Insert Screw (Pt. #17) being sure pocket is free of chips or dirt. Then adjust Rectangular Chip Breaker (Pt. #19) so that it is approximately 1/16" behind leading edge of carbide insert and lock in place with clamp.

(2) All other instructions for setting are same as for the Tangi-Square tool slide.

DIAMETER TURNING WITH TRIANGULAR CARBIDE INSERT TOOL SLIDE

(1) Install Triangular Carbide Insert (Pt. #21) into pocket being sure it is free of chips and dirt. Set Triangular Chip Breaker (Pt. #22) about 1/16" back from leading edge of insert and lock in place with Clamp (Pt. #25) by tightening Clamp Screw (Pt. #26).

(2) All other instructions for setting are same as for the Tangi-Square tool slide.

(3) Use adjustment lever (Pt. #33) to move chip breaker setting until best chip breaking action is attained.

NOTE: Triangular Anvil (Pt. #23) should last indefinitely and need only be changed when damaged.

DIAMETER TURNING WITH H.S.S. CUTTING TOOL SLIDE

(1) Sharpen the end surface only of the H.S.S. Cutting Tool (Pt. #13) at 20o angle. Since the CuttingTool is mounted at 10o in the tool slide this will produce a 10o top rake which should be satisfactory for most materials.

(2) Assemble cutting tool into Tool Slide (Pt. #2) pushing it tightly against the Chip Breaker (Pt. #15) being sure slot is free of chips or dirt. Chip breaker should be set approximately 1/16" behind leading edge of cutting tool for trial cuts.

Depending on the material being machined it may be necessary to adjust the Chip Breaker (Pt. #15) back or forth until the desired cutting action is obtained.

NOTE: Very fine diameter adjustments can be made by rocking the cutting tool as follows: Loosen lower Tool Lock Screw (Pt. #14) slightly and tighten Rocker Screw (Pt. #12) against cutting tool rocking it into work. When desired diameter is obtained readjust both rolls to bear on turned diameter.

(3) All other instructions for setting are same as for the Tangi-Square tool slide.

DIAMETER TURNING WITH EXTENDED ROLLER BLOCKS

For those applications where it is desired to roll on a diameter other than the diameter being turned, Extended Roller Blocks with rolls positioned ahead of the cutting tool are available.

(1) Extended Roller Blocks (Pt. #5) can be interchanged with standard Roller Blocks (Pt. #4) by unscrewing Roller Slide Clamp Lock Screw (Pt. #11) and removing Roller Block Clamp (Pt. #30).

(2) Install both Extended Roller Blocks (Pt. #5) into tool and replace clamp and retighten lock screw. Be certain that slot in bottom of roller blocks engage flange of Adjusting Screw (Pt. # 31).

(3) Adjust extended roller blocks as explained previously until rolls contact diameter you wish to support on, being certain that both rolls revolve with the workpiece.

(4) Set Cutting tool to desired diameter as explained previously.


For best results with this or any other turning tool, the front end of the workpiece should be chamfered at 45 to slightly below the diameter to be turned.

To simplify resetting of tool, do not cutoff the last turned piece so that cutting tool can be set against the already turned diameter.