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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.

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TA/TAS BORING BAR SPECIFICATIONS

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.

 

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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

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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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