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Acura-Series Collet Chucks
with National Milling Machine Shank (NMTB)

Note! These chucks are compatible with:
14pt Dot Acura-Flex extended range collets - using Acura-Flex Nut
14pt Dot Acura-Grip maximum accuracy collets - using Acura-Grip Nut
14pt Dot Acura-Mill positive drive maximum accuracy collets - using Acura-Grip Nut

Note! The National Milling Machine shank is also know as NMTB (DIN 2080 / IS 2340),
MM, National Standard, American Standard Machine Taper (ASA B5.40-1962 & ASA B5.10-1963),
ISOXX, QCXX and Quick Change.

Acura-Flex Collet Chuck with NMTB Shank - drawing Acura-Flex Collet Chuck with NMTB Shank - picture
Universal Engineering (TSD) part numbers, dimensions and specifications

Shank
Size

Collet Range

Universal Part No.

C

D

F

Thread

Wrench
Part No

AF Nut
Part No

AG Nut
Part No

30MM

1/16 to 3/8

90398

1.94

.99 to 1.75

1.00 oct.

1/2-13

55068

9400002

90376

30MM

7/64 to 3/4

90775

2.59

2.00 to **

1.94 dia.

1/2-13

55139

9400005

90751

40MM

1/16 to 3/8

90400

1.94

.99 to 2.12

1.00 oct.

5/8-11

55068

9400002

90376

40MM

7/64 to 1/2

90532

2.36

1.12 to 2.68

1.25 oct.

5/8-11

55105

9400020

90501

40MM

7/64 to 3/4

911514

1.88

2.18 to 3.25

1.94 dia.

5/8-11

55139

9400005

90751

40MM

7/32 to 1"

901030

3.31

2.47 to 3.75

2.50 dia.

5/8-11

55171

9400021

901001

50MM

7/64 to 3/4

90779

4.09

2.00 to 4.38

1.94 dia.

1-8

55139

9400005

90751

50MM

7/32 to 1"

901032

4.06

2.47 to 5.56

2.50 dia.

1-8

55171

9400021

901001

50MM

11/32 to 1-3/8

91679

4.0

3.09 to 5.50

3.00 dia.

1-8

85296

9400011

901376

50MM

11/32 to 1-3/8

901380

4.16

3.09 to 5.50

3.00 dia.

1-8

85296

9400011

901376

50MM

19/32 to 1-5/8

901650

4.13

3.09 to 4.75

3.38 dia.

1-8

55200

9400014

901626
Click on Part Number Links for Price and Availability

Note: The specifications and information provided on this page are intended for part identification purposes only.
Although we believe them to be correct, dimensions should not be used for part construction or inspection.

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