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637.25

Item number:

Description:

Unique coupling design gives excellent combination of radial flexibility with torsional stiffness. Applications include: Encoders, tachogenerators, small pumps, motors and drives.

Select bore(s) before adding to cart (prices will change if keyways are selected).

Bore 1
Bore 2
Part #:

Technical Specifications

Coupling Type
Step Beam Coupling
Configuration
Step Beam
Size
25
Material
Nylon
Max Bore B1 (in)
0.5
Max Bore B1 (mm)
12.7
Min Bore B1 (in)
0.236
Min Bore B1 (mm)
6
Max Bore B2 (in)
0.5
Max Bore B2 (mm)
12.7
Min Bore B2 (in)
0.236
Min Bore B2 (mm)
6
Angular Compensation, Max (degrees)
5
Axial Compensation, Max (in)
0.012
Axial Compensation, Max (mm)
0.3
Bore Tolerance (in)
+0.0012 / -0.0000
Bore Tolerance (mm)
+0.03 / -0.00
Fastener Screw Size
M3
Fastener Screw Torque (lb-in)
0.08
Fastener Screw Torque (Nm)
0.009
Fastener Wrench Size (mm)
2.5
Max Speed (rpm)
10000
Operating Temperature (°C)
-25 to +82
Operating Temperature (°F)
-20 to +302
Peak Torque (lb-in)
0.98
Peak Torque (Nm)
2.5
Radial Compensation, Max (in)
0.012
Radial Compensation, Max (mm)
0.3
Resists Axial Load
Yes
Shaft Connection
Clamp
Torsional Stiffness (lb-in/rad)
159
Torsional Stiffness (Nm/rad)
18
Mass (Weight) (g)
17.4
Mass (Weight) (oz)
0.62
[D] Outside Diameter (in)
0.98
[D] Outside Diameter (mm)
25
L1 Dimension (in)
0.39
L1 Dimension (mm)
10
[L] Length (in)
1.42
[L] Length (mm)
36
[L] Overall Length (in)
1.42
[L] Overall Length (mm)
36
Item Note
Coupling load capacity depends on the operating load cycle. Refer to catalog for further sizing information.
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