
Initially designed for use in Criterion Boring Heads, the TA and TAS Indexable Insert Boring Bars can be used in engine lathes, turret lathes and automatics. They are equally adaptable in machines where the tool or the work turns.
Ranging in minimum bore sizes from 1/4 to 1 -1 /4 inches, they are available in either standard or stubby length. The bars come in 4 shank diameters: 1/2, 5/8, 3/4 and 1 inch. As a further enhancement to this line of bars, they feature a round shank with parallel flats for secure 3 point clamping in a round hole or 2 point clamping when used in a turret post or similar holder.
These bars will take flat top inserts or chip control style inserts. Both styles of inserts are held into the pocket with a torx screw. Tool specifications and insert specifications are shown below.
All shanks are cylindrically ground to a tolerance of .0005 to assure a good fit in a round holder. The four parallel flats are machined after grind and are timed to place the cutting edge of the insert on exact centerline. For added strength and rigidity, the quill portion of the shank is oval shaped. In addition to providing greater chip clearance, this design helps eliminate tool deflection resulting in better cutting performance.

|
CODE NO. |
TOOL NO. |
C | D | ØA | ØB | E | INSERT I.C. |
INSERT SCREW |
SCREW WRENCH |
|---|---|---|---|---|---|---|---|---|---|
|
10150 |
TA-250ATX |
1-1/16 |
2-7/16 |
3/8 |
1/4 |
5/16 |
0.156* |
SN-28TX |
T-6 |
|
10151 |
TA-312ATX |
1-7/16 |
2-3/4 |
3/8 |
5/16 |
5/16 |
0.156 |
SN-28TX |
T-6 |
|
10152 |
TA-375ATX |
1-3/4 |
3-1/16 |
3/8 |
3/8 |
5/16 |
0.156 |
SN-28TX |
T-6 |
|
10136 |
TA-250BTX | 1-1/16 | 2-7/16 | 1/2 | 1/4 | 7/16 | 0.156* | SN-28TX | T-6 |
|
10137 |
TA-312BTX | 1-7/16 | 2-3/4 | 1/2 | 5/16 | 7/16 | 0.156 | SN-28TX | T-6 |
|
10138 |
TA-375BTX | 1-3/4 | 3-1/16 | 1/2 | 3/8 | 7/16 | 0.156 | SN-28TX | T-6 |
|
10139 |
TA-437BTX | 2-1/16 | 3-3/8 | 1/2 | 7/16 | 7/16 | 0.250 | SN-116TX | T-7 |
|
10118 |
TA-500BTX | 2-3/16 | 3-1/2 | 1/2 | 1/2 | 7/16 | 0.250 | SN-116TX | T-7 |
|
10250 |
TA-250CTX | 1-1/16 | 2-7/16 | 5/8 | 1/4 | 7/32 | 0.156* | SN-28TX | T-6 |
|
10252 |
TA-375CTX | 1-3/4 | 3-1/16 | 5/8 | 3/8 | 7/32 | 0.156 | SN-28TX | T-6 |
|
10254 |
TA-500CTX | 2-3/16 | 3-1/2 | 5/8 | 1/2 | 7/32 | 0.250 | SN-116TX | T-7 |
|
10255 |
TA-625CTX | 2-3/4 | 4-25/64 | 5/8 | 5/8 | 7/32 | 0.250 | SN-116TX | T-7 |
|
10119 |
TA-500DTX | 2-1/2 | 4-1/4 | 3/4 | 1/2 | 41/64 | 0.250 | SN-116TX | T-7 |
|
10120 |
TA-750DTX | 3 | 4-11/16 | 3/4 | 3/4 | 41/64 | 0.375 | SN-100TX | T-20 |
|
10121 |
TA-1000DTX | 3-1/2 | 5-1/8 | 3/4 | 1 | 41/64 | 0.375 | SN-100TX | T-20 |
|
10122 |
TA-1250DTX | 4 | 5-9/16 | 3/4 | 1-1/4 | 41/64 | 0.375 | SN-100TX | T-20 |
|
10123 |
TA-500ETX | 2-3/8 | 4-1/4 | 1 | 1/2 | 55/64 | 0.250 | SN-116TX | T-7 |
|
10124 |
TA-750ETX | 2-7/8 | 4-11/16 | 1 | 3/4 | 55/64 | 0.375 | SN-100TX | T-20 |
|
10125 |
TA-1000ETX | 3-1/2 | 5-1/8 | 1 | 1 | 55/64 | 0.375 | SN-100TX | T-20 |
|
10126 |
TA-1250ETX | 3-7/8 | 5-9/16 | 1 | 1-1/4 | 55/64 | 0.375 | SN-100TX | T-20 |
| CODE NO. | TOOL NO. |
C | D | ØA | ØB | E | INSERT I.C. |
INSERT SCREW |
SCREW WRENCH |
|---|---|---|---|---|---|---|---|---|---|
| 10140 | TAS-250BTX | 1/2 | 1-7/8 | 1/2 | 1/4 | 7/16 | 0.156* | SN-28TX | T-6 |
| 10141 | TAS-312BTX | 5/8 | 2 | 1/2 | 5/16 | 7/16 | 0.156 | SN-28TX | T-6 |
| 10142 | TAS-375BTX | 3/4 | 2-1/16 | 1/2 | 3/8 | 7/16 | 0.156 | SN-28TX | T-6 |
| 10143 | TAS-437BTX | 7/8 | 2-1/8 | 1/2 | 7/16 | 7/16 | 0.250 | SN-116TX | T-7 |
| 10127 | TAS-500BTX | 1 | 2-5/16 | 1/2 | 1/2 | 7/16 | 0.250 | SN-116TX | T-7 |
| 10256 | TAS-250CTX | 1/2 | 1-7/8 | 5/8 | 1/4 | 7/32 | 0.156* | SN-28TX | T-6 |
| 10258 | TAS-375CTX | 3/4 | 2-1/16 | 5/8 | 3/8 | 7/32 | 0.156 | SN-28TX | T-6 |
| 10260 | TAS-500CTX | 1 | 2-11/32 | 5/8 | 1/2 | 7/32 | 0.250 | SN-116TX | T-7 |
| 10261 | TAS-625CTX | 1-1/4 | 2-27/32 | 5/8 | 5/8 | 7/32 | 0.250 | SN-116TX | T-7 |
| 10128 | TAS-500DTX | 1-5/16 | 2-15/16 | 3/4 | 1/2 | 41/64 | 0.250 | SN-116TX | T-7 |
| 10129 | TAS-750DTX | 1-17/32 | 3-5/32 | 3/4 | 3/4 | 41/64 | 0.375 | SN-100TX | T-20 |
| 10130 | TAS-1000DTX | 1-3/4 | 3-3/8 | 3/4 | 1 | 41/64 | 0.375 | SN-100TX | T-20 |
| 10131 | TAS-1250DTX | 1-31/32 | 3-19/32 | 3/4 | 1-1/4 | 41/64 | 0.375 | SN-100TX | T-20 |
| 10132 | TAS-500ETX | 1-5/16 | 2-15/16 | 1 | 1/2 | 55/64 | 0.250 | SN-116TX | T-7 |
| 10133 | TAS-750ETX | 1-17/32 | 3-5/32 | 1 | 3/4 | 55/64 | 0.375 | SN-100TX | T-20 |
| 10134 | TAS-1000ETX | 1-3/4 | 3-3/8 | 1 | 1 | 55/64 | 0.375 | SN-100TX | T-20 |
| 10135 | TAS-1250ETX | 1-31/32 | 3-19/32 | 1 | 1-1/4 | 55/64 | 0.375 | SN-100TX | T-20 |
*0.156 I.C. Trigon Insert
Bore diameter "B" is based upon bar turning around its own centerline using a zero radius (.002) insert.


TA and TAS Boring Bar Sets are available in 1/2, 5/8, 3/4, and 1 inch diameter shank sizes. Each set of tools comes in an attractive tool block that holds each tool in an upright position for easy access.

|
STANDARD LENGTH | |||
|---|---|---|---|
| TA-B5-TX | TA -C4-TX | TA-D4-TX | TA-E4-TX |
| TA-250BTX | TA-250CTX | TA-500DTX | TA-500ETX |
| TA-312BTX | TA-375CTX | TA-750DTX | TA-750ETX |
| TA-375BTX | TA-500CTX | TA-1000DTX | TA-1000ETX |
| TA-437BTX | TA-625CTX | TA-1250DTX | TA-1250ETX |
| TA-500BTX |
-- |
-- |
-- |
|
STUBBY LENGTH | |||
| TAS-B5-TX | TAS-C4-TX | TAS-D4-TX | TAS-E4-TX |
| TAS-250BTX | TAS-250CTX | TAS-500DTX | TAS-500ETX |
| TAS-312BTX | TAS-375CTX | TAS-750DTX | TAS-750ETX |
| TAS-375BTX | TAS-500CTX | TAS-1000DTX | TAS-1000ETX |
| TAS-437BTX | TAS-625CTX | TAS-1250DTX | TAS-1250ETX |
| TAS-500BTX |
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