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821.25

Item number:

Description:

The single beam coupling is more flexible than the multi-beam but less torsional rigid. Applications include: Stepper drives, encoders, general purpose light duty power transmission applications. Speeds range up to 5000 rpm in standard form and up to 30000 rpm in balanced form.

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

Bore 1
Bore 2
Part #:

Technical Specifications

Coupling Type
Single Beam - S Beam
Configuration
Single Beam
Size
25
Material
Stainless Steel
Max Bore B1 (in)
0.394
Max Bore B1 (mm)
10
Min Bore B1 (in)
0.197
Min Bore B1 (mm)
5
Max Bore B2 (in)
0.394
Max Bore B2 (mm)
10
Min Bore B2 (in)
0.236
Min Bore B2 (mm)
6
Angular Compensation, Max (degrees)
5
Axial Compensation, Max (in)
0.01
Axial Compensation, Max (mm)
0.25
Bore Tolerance (in)
+0.0012 / -0.0000
Bore Tolerance (mm)
+0.03 / -0.00
Fastener Screw Size
M3
Fastener Screw Torque (lb-in)
10.62
Fastener Screw Torque (Nm)
1.2
Fastener Wrench Size (mm)
2.5
Max Speed (rpm)
20000
Operating Temperature (°C)
-40 to +140
Operating Temperature (°F)
-40 to +284
Peak Torque (lb-in)
38.06
Peak Torque (Nm)
4.3
Radial Compensation, Max (in)
0.01
Radial Compensation, Max (mm)
0.25
Resists Axial Load
Yes
Shaft Connection
Clamp
Torsional Stiffness (lb-in/rad)
398
Torsional Stiffness (Nm/rad)
45
Mass (Weight) (g)
91
Mass (Weight) (oz)
3.2
[D] Outside Diameter (in)
1
[D] Outside Diameter (mm)
25.4
L1 Dimension (in)
0.39
L1 Dimension (mm)
10
[L] Length (in)
1.18
[L] Length (mm)
30
[L] Overall Length (in)
1.18
[L] Overall Length (mm)
30
Item Note
Coupling load capacity depends on the operating load cycle. Refer to catalog for further sizing information.
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