General Catalog

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 )

1.0 1.2 1.4 1.6 2.2 2.8 3.2

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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