Table I : Coefficient of Rolling Friction (f 1 )
2. Chain sliding
Type of Roller
Dry
Lubricated
Oversize “R” roller type Standard “S” roller type
0.12 0.21 0.09
0.08 0.14 0.06
Top roller type
Table II : Coefficient of Sliding Friction (f 2 )
Dry 0.3
Lubricated
0.2
Step 4 Verify chain selection Multiply the chain tension (T) by the chain speed coefficient (K 1 ) listed in Table III and verify the following formula.
T • K 1
Max. allowable load of the chain . . . . . . . . . . . . . . . . (14)
Table III : Chain Speed Coefficient (K 1 )
Chain Speed (ft./min)
Speed Factor (K 1 )
0
50
1.0 1.2 1.4 1.6 2.2 2.8 3.2
50
100 160 230 300 360 400
100 160 230 300 360
When the design chain tension (T • K 1 ) is over the allowable load or much less than it, try the same steps again for the next bigger or smaller chain size to select a more suitable chain.
Step 5 Verify the allowable roller load When the load is carried on the rollers, the total weight of the chain and load per roller should not exceed the allowable roller load shown in Table IV.
3. Calculate the required power
Table IV : Allowable Roller Load
Allowable Roller Load lbs./roller
Chain No.
Plastic Oversize Roller Oversize Roller Standard Roller
C2040 C2050
RS40 RS50
143 220 350 590 880
44 66
33 44 66
C2060H RS60 C2080H RS80 C2100H RS100 C2120H RS120
110 198 286
120 180
1,320
— 260 — 300 — 430
RS140
—
—
C2160H RS160
2,160
Note: Oversize “R” rollers are available only for double pitch roller chains.
U.S. Tsubaki Hi-Tech and Specialty Attachment chains. In addition to the attachment chains shown in this general catalog, we offer a large variety of Specialty Attachment chains. Refer to our U.S. Tsubaki Attachment Chain Catalog No. LI0666 for additional selections.
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