Although
originally designed as threading bars, the TBG-1000 and 750 can be used equally as
well for boring, counterboring, grooving, thread-relieving and chamfering.
The wedge-shaped insert is firmly held in place by a stout clamp. The greater the pressure on the locking, screw, the more firmly the insert is forced against the back, assuring solid engagement. Centerline to cutting edge distance is held by locating against a removable set screw. See sketch at bottom of page for method of change-over from right hand to left hand tool.
SUGGESTED INSERT FORMS |
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This insert, made from a blank, can be ground to the best geometry for a tool making a straight through bore. Rake and clearance angles best suited to the material being machined, can be selected. |
Illustrated is a combination of operations that may be performed with one bar and a variety of carbide inserts. |
This insert would be the proper selection when boring to a shoulder or when making a counter-bore. For best results, a small radius and adequate top rake would be advised. |  |
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Thread relieving insert, one of the many forms that may be ground from a blank insert. As in standard threading inserts, blanks are available in grades C-2 and C-6. | The grooving insert shown is just one of many grinds ideal for "O" ring or retaining ring grooves. A variety of widths can be stocked, at low cost, for almost any grooving operation. |  |
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Standard threading insert for 60° thread form is factory ground for thread pitch 10 to 80. Also available for left hand threads. | With a 90° included angle ground on a blank insert, you have the perfect tool for making either inside or outside chamfers. It may also be used for profiling. |  |
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RIGHT TO LEFT HAND |
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The drawing on the left shows a standard insert, in a right hand thread-cutting mode. By removing screw (A) and placing it on the opposite side of the bar -- then inserting an opposite hand insert (drawing on right) you have switched over to a left hand cutting mode. All other forms shown above may be changed in the same manner. |
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BAR |
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| CODE NO. | TOOL NO. | A | B | C | D | E |
| 15860 | TBG-1000 | 6" | 3/4" | 5/8" | 1/2" | 15/16" |
| 15861 | TBG-750 | 4" | 1/2" | 7/16" | 3/8" | 11/16" |
| THREADING INSERTS* | INSERT NO. | DIMENSIONS | |||||||
| RIGHT HAND | LEFT HAND | A | B | C | D | ||||
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FOR TOOL NO. TBG-1000 | 1/4 | 3/4 | .200 | .210 | ||||
| T4-RF | T4-LF | ||||||||
| C2 | C6 | C2 | C6 | ||||||
| Code No. | 13510 | 13511 | 13520 | 13521 | |||||
| FOR TOOL NO. TBG-750 | 3/16 | 17/32 | .140 | .125 | |||||
| T3-RF | T3-LF | ||||||||
| C2 | C6 | C2 | C6 | ||||||
| Code No. | 13540 | 13541 | 13550 | 13551 | |||||
BLANK INSERTS |
FOR TOOL NO. TBG-1000 | 1/4 | 3/4 | .210 | |||||
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T4-B | ||||||||
| C2 | C6 | ||||||||
| Code No. | 13530 | 13531 | |||||||
| FOR TOOL NO. TBG-750 | 3/16 | 17/32 | .125 | ||||||
| T3-B | |||||||||
| C2 | C6 | ||||||||
| Code No. | 13560 | 13561 | |||||||
GRADE C-2 -- For Refractory Metals, Cast Iron & Non-Ferrous Alloys
GRADE C-6 -- For Steel and Steel Alloys
*When feed is in the direction of the head-stock, use T4-LF for right
hand internal thread, for right hand external thread, use T4-RF.
For left hand internal thread, use T4-RF and T4-LF for left hand external thread.
| The illustration on the right shows how the threads may be chased on both the I.D. and the O.D. of a work-piece by changing from a right-hand to a left-hand threading insert. The bar itself does not require resetting --- thereby maintaining exact centerline position for both operations. This same concept may also be applied to a wide variety of insert forms --- such as internal or external grooves, inside or outside chamfer, I.D. or O.D. thread reliefs or any of the other operations associated with metal working. An ideal tool for the tool-room lathe or the high production N/C Machine. |
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