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Spindle Type and Size Guide

It’s essential to choose the correct direct mount lathe chuck or chuck adapter plate when upsizing or replacing a lathe chuck on your machine. It can be a challenge to determine your spindle type when you don’t have that information on hand. The easiest way to determine the spindle type and size is to remove the chuck and/or adapter plate from the spindle nose and measure it. Save time by using the guide below to quickly and accurately measure your machine.

Common Machine Spindle Types


D1 Camlock Spindle, DIN 55029, ISO 702/II

Determining D1 Type Spindle and Size

  1. Measure the pilot diameter and length (B & C)

  2. Measure the bolt circle diameter (F)

  3. Measure the diameter of the holes (E)

D1 Camlock Spindle Nose Image


D Spindle Type Dimensional Specifications Technical Drawing

Spindle
Nose

A
(in)

F
(in)

B
(in)

C
max
(in)

E
(in)

Number
of Holes

Camlock
Stud Dia
(in)

D1-3

3.622

2.7820

2.1250 + .00025

.4375

.5937

3

9/16

D1-4

4.606

3.2500

2.5005 + .0005

.4375

.6562

5/8

D1-5

5.748

4.1250

3.2505 + .0005

.5000

.8750

6

3/4

D1-6

7.126

5.2500

4.1880 + .0005

.5625

1.000

7/8

D1-8

8.858

6.7500

5.50075 +.0005

.6250

1.125

1

D1-11

11.732

9.2520

7.75075 +.0005

.6875

1.250

1 3/16

D1-15

15.866

13.0000

11.251 + .001

.7500

1.375

1 3/8

D1-3 camlock stud. Each stud has a “D“ shaped cutout TMX Part Number 3-899-103P
TMX D1-6 direct mount self-centering scroll chuck TMX Part Number 3-823-0836
D1-3 camlock stud. Each stud has a “D“ shaped cutout TMX Part Number 3-899-103P

 

A1/A2 Short Taper, DIN 55026, ISO 702/I

Determining an A Type Spindle and Size

  1. Measure the pilot diameter and length (B & C)
  2. Measure the bolt circle diameter (F1 and F2) and diameter of the holes (E1 & E2)
  3. Check the number of bolt circles (one for A2 mount or two for A1 mount)
  4. All chucks with A1 mount can be installed on A1 spindle nose only
  5. All chucks with A2 mount can be installed on either a A2 or A1 spindle.
A1 / A2 Spindle Nose Image



Spindle
Nose

F1
(in)

F2
(in)

B
(in)

C
max
(in)

Thread
E1 = E2
UNC-3B

A-4

3.2500

-

2.5005 + .0005

.4375

7/16-14

A-5

4.1250

2.4374

3.2505 +.0005

.5625

7/16-14

A-6

5.2500

3.2500

4.1880 + .0005

.6250

1/2-13

A-8

6.7500

4.37500

5.50075 + .0005

.6875

5/8-11

A-11

9.2500

6.5000

7.75075 + .0005

.7500

3/4-10

A-15

13.0000

9.7500

11.251 + .001

.8125

7/8-9

A-20

18.2500

14.5000

16.251 +.001

.8750

1-8

A-28

25.5000

20.8750

23.001 + .001

1.000

1 1/4-7

TMX A2-8 fully finished adapter plate for a Set-Tru TMX Part Number 3-874-108P
TMX A2-11 direct mount independent manual lathe chuck TMX Part Number 3-856-1619P

L Type Long Taper Key Drive

Determining an L Type Spindle and Size

  1. Measure pilot diameter (A)
  2. Measure length (C)
  3. Measure thread size (dimension B)


Spindle Nose Type L Long Taper Image
L Spindle Type Dimensional Specifications Technical Drawing

Spindle
Nose

Thread
B

C
(in)

A
(in)

Key

L00

3 3/4" - 6"

2

2.750

3/8 x 3/8 x 1 1/2

L0

4 1/2" - 6"

2 3/8

3.250

3/8 x 3/8 x 1 3/4

L1

6" - 6"

2 7/8

4.125

5/8 x 5/8 x 2 3/8

L2

7 3/4" - 5"

3 3/8

5.250

3/4 x 3/4 x 2 7/8

L3

10 3/8" - 4"

3 7/8

6.500

1 x 1 x 3 1/4

 

L00 Fully Finsihed Adapter TMX Item 3-879-081P
L00 type adapter plate on a Set-Tru Chuck TMX Items 3-879-9061P and 3-866-0600P