Item # W7C20-4mm-4mm, Helical W Series Stainless Steel Couplings On Japanese Products Corp.

Metric dimensions and fasteners
Available in 7075-T6 aluminum alloy or 17-4 PH corrosion- resistant steel
General purpose

If you are working in the metric world, the W Series is for you. It combines the best features of the A Series and the H Series, with the convenience of metric dimensions and fasteners for your metric based designs. The W Series can be used in a wide range of applications from driving components with light torque requirements, such as encoders and tachometers (aluminum), to lead screws and pumps requiring greater torque (stainless steel).

Unit of Measure

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Specifications

Product Type	N/A Coupling
Series	N/A W7C
Material	N/A 17-4 High Strength Stainless Steel
Finish	N/A Natural
Outside Diameter Designator	N/A 20
Outside Diameter (D)	N/A 20 mm
Length (L)	N/A 28 mm
Bore Diameter	N/A 4.00 mm
Bore Designator	N/A 4 mm
Momentary Dynamic Torque	N/A 2.6 N·m
Torsional Rate	N/A 0.99 degree/N·m
Inertia	N/A 0.32 x 10^-5 kg.cm.sec²
Screw Size	N/A M3 x 0.5
Seating Torque	N/A 2.0 N·m
Center Line	N/A 3.8 mm
Min. Size	N/A 4.00 mm
Max. Size	N/A 6.35 mm
Max. Bore Diameter	N/A 9.81 mm
Bore Depth	N/A 8.55 mm
Features	N/A Metric dimensions and fasteners Available in 7075-T6 aluminum alloy or 17-4 PH corrosion-resistant steel General purpose If you are working in the metric world, the W Series is for you. It combines the best features of the A Series and the H Series, with the convenience of metric dimensions and fasteners for your metric based designs. The W-Series can be used in a wide range of applications from driving components with light torque requirements, such as encoders and tachometers (aluminum), to lead screws and pumps requiring greater torque (stainless steel).
Note	N/A Shaft misalignments: Angular 5 degrees Parallel Offset 25 mm. (0.50 mm T.I.R) Axial Motion ±0.25 mm. Manufacturing dimensional tolerances unless otherwise specified are: x ± 0.5 mm x.x ± 0.25 mm keyways available on the 40 mm and 50 mm OD only.