NEW TSUBAKI HDS50A20

The Tsubaki HDS50A20 is a double-strand, hardened-tooth, Type A flat-plate roller chain sprocket designed for ANSI #50 (5/8" pitch) roller chain. The "H" prefix denotes hardened teeth (Rockwell C35 minimum) for superior wear resistance, while the "A" designation indicates a hubless plate-style body. This sprocket is produced from carbon steel with a stock bore of 3/4" and is suitable for demanding power transmission applications where extended service life and chain engagement precision are required.
Specification
Value
Brand
Tsubaki (U.S. Tsubaki Power Transmission)
Model / Part Number
HDS50A20
Product Type
Roller Chain Sprocket
Chain Number (ANSI)
#50
Chain Pitch
5/8" (0.625 in)
Number of Strands
Double (2-Strand)
Number of Teeth
20
Hub Type
Type A – Flat Plate (No Hub)
Outside Diameter
4.321 in
Pitch Diameter
3.995 in
Stock Bore Diameter
3/4 in (0.750 in)
Sprocket Thickness (Tooth Width)
0.343 in (nominal)
Hardened Teeth
Yes – Rockwell C35 Minimum
Material
Carbon Steel
Chain Inside Width
0.375 in
Chain Roller Diameter
0.400 in
Bore Type
Stock / Plain Bore (reborable)
Standard
ANSI / ASME B29.1
We warranty all items for 30 days from date of purchase.