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HELICAL A SERIES, Aluminum, Technical Data

Basic Model Number

Dimensional Information

Standard Bore Diameters

Performance Data

Inertia

Screw Size

Seating Torque

Center Line

Integral Clamp Attachment

Set Screw Attachment

Outside Diameter Designator

D 
Outside Diameter (in.)

L
Length (in.)

(+.002in/-.000in) Note 6

Momentary Dynamic Torque Note 2 (lbin)

Torsional Rate (degree/lbin)

x.10-5 (lbinsec2) Note 7

Integral Clamp
Note 4

Set Screw
Note 4

(lbin)

(in.)
Size 
in. &  (mm)

                       

   Bore  Designator (1/32nd in.)

ACR

  

050

1/2

0.75

0.094     (2.39)
0.125     (3.18)

3
4

3.7
3.5

0.98
1.3

0.11

1-72

  

4.0

.09

 

AR

0.50

0.069

   

2-56

1.3

.06

ACR

     062

5/8

0.80

0.125      (3.18)
0.157      (3.99)
0.188      (4.78)

4
5
6

7.1
6.7
6.2

0.51
0.66
0.86

0.28

2-56

 

4.5

.10

 

AR

0.62

0.21

    

4-40

4.3

.07

ACR

  
075

3/4

0.90

0.125      (3.18)
0.157      (3.99)
0.188      (4.78)
0.250      (6.35)

4
5
6
8

10
10
9.8
8.6

0.29
0.36
0.44
0.68

0.66

4-40

 

10

.12

 

AR

0.75

0.54

 

6-32

8.0

.09

ACR

 

 087

7/8

1.06

0.188      (4.78)
0.250      (6.35)
0.313      (7.95)

6
8
 10*

19
17
15

0.20
0.28
0.41

1.5

6-32

 

19

.15

 

AR

0.87

1.2

 

6-32

8.0

.10

ACR

   100

1

1.25

0.250      (6.35)
0.313      (7.95)
0.375      (9.53)

8
10
12

27
24
22

0.17
0.24
0.33

3.0

6-32

 

19

.15
 

AR

1.00

2.3

 

10-24

25

.15

ACR

 
112

1 1/8

1.50

 0.250      (6.35)
 0.313      (7.95)
 0.375      (9.53)
 0.500    (12.70)

8
10
12
16

43
40
37
28

0.094
0.12
0.17
0.32

5.6

6-32

 

19

.15

 

AR

1.12

4.1

  

10-24

25

.14

ACR

 
125

1 1/4

1.62

 0.375      (9.53)
 0.500    (12.70)
 0.625    (15.88)

12
 16*
 20*

48
39
29

0.11
0.20
0.37

9.3

10-24

 

50

.22

 

AR

1.25

6.9

 

1/4-20

65

.16

 *Refer to note 8

Notes    
                                                                                                                                       
1. Shaft misalignments:

    Angular 5 degrees
    Parallel Offset .010 in. (.020 in. T.I.R.)
    Axial Motion + .010 in.

2. Dynamic torque ratings are momentary values. For non-reversing applications, divide by 2. Divide by 4 for
    reversing applications. 
    Should the torque ratings be marginal for your application, contact us for analysis.

3. Material: 7075-T6 aluminum alloy used for ACR / AR series.

        Finish: clear anodize

4. Metric fasteners available on request.

5. Manufacturing dimensional tolerances unless otherwise specified are:

    fraction + 1/64
    x.xx + .01

6. Click Here for other available bore dimensions

7. Inertia is based on smallest standard bore diameter.

8. With integral clamp attachments only, this bore size requires an operating clearance diameter greater 
    than coupling outside diameter.