U.S. TSUBAKI ENGINEERING INFORMATION & CHAIN SELECTION
MATERIALS OF COMPONENT PARTS
Link Plate
Pin
Bushing
Roller
Special (13-7PH)
ASTM631-HT (17-7PH)
ASTM631-HT (17-7PH)
AS Series
AISI 304
SS Series
AISI 304
AISI 304
AISI 304
AISI 304
NS Series
AISI 316
AISI 316
AISI 316
AISI 316
PH: Precipitation Hardened The corrosion resistance of special 13-7 PH is equal to that of 17-7 PH.
PERFORMANCE OF ANTI-CORROSIVE CHAINS
Corrosion Resistance
Temperature Resistance
Wear Resistance
Magnetism
14°F~140°F (Never use below -4°F or over 300°F)
Acceptable for outdoor and decorative applications
NP Chain
Magnetic
Excellent
Excellent for outdoors, exposure to rain, and seawater
NEPTUNE ® Chain
14°F~140°F
Magnetic
Excellent
AS Series
Good for general acid, alkali and water
-40°F~750°F (Never use over 930°F)
Magnetic
Good
-40°F~750°F (Never use below -270°F or over 1300°F) -40°F~750°F (Never use below -420°F or over 1500°F)
SS Series
Good for general acid, alkali and water
Slightly magnetic due to cold forming of parts
Fair
NS Series
Superior to SS & AS
Non-magnetic
Fair
CHAIN SELECTION General selection is based on bearing pressure between the pin and bushing. Anti-corrosive roller chains are normally intended to be used at slow speed without lubrication. Chain selection should be made based on the bearing pressure as shown below.
Maximum Allowable Bearing Pressure Between Pin and Bushing
Maximum Operating Speed
SS Series NS Series AS Series
1,420 psi 1,420 psi 2,130 psi
230 ft./min. 230 ft./min. 230 ft./min.
Chain selection can be made using the following formula.
Maximum Chain Tension
Service Factor
Speed Coefficient
Temperature Factor
Maximum Allowable Load
X
X
X
≥
Maximum allowable load or maximum bearing pressure as shown above can be doubled only when chain is used in group “1” of the “Corrosion Resistance Guide” on page A-60 and properly lubricated.
A-61
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