Technical Data Top chain Selection
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Selection Process for Snap Cover Chain
1-1. Determine Chain Size
1-1-1. Check Allowable Load
Make certain that the load applied per link is within the maximum allowable load indicated in Table 1.
1-1-2. Calculate Chain Tension and Power Required
- F = Max. tension applied to chain kN{kgf}
- m1 = Weight of conveyed goods (kg/m)
- m2 = Chain mass (kg/m)
- S = Length of conveyance (sprocket center distance) (m)
- S' = Length of accumulation section (m)
- μ1 = Coefficient of friction between chain and wearstrip [Carry Way ](See Table 2 )
- μ2 = Coefficient of friction between chain and wearstrip [Return Way ](See Table 3 )
- μ3 = Coefficient of dynamic friction between conveyed products and chain (See Table 4 )
- P = Power required (kW)
- V = Chain speed (m/min)
- K = Speed coefficient (See Table 5 )
- ηNote) = Transmission efficiency of drive unit
- G = Gravitational acceleration 9.80665m/s2
Note) For the mechanical transmission efficiency, check the drive unit used.
Table 2. Coefficient of Rolling Friction between Chain and Wearstrip (μ1)
| No lube | With lube |
|---|---|
| 0.21 | 0.14 |
Table 4. Coefficient of Dynamic Friction between Conveyed Products and Chain (Plastic Cover) (μ3)
| Conveyed products | Plastic cover material |
|---|---|
| Standard Series Electroconductive |
|
| Steel cans aluminum cans |
0.25 |
| Paper package | 0.3 |
| Glass bottle | 0.22 |
| Plastic container | 0.25 |
| Industrial parts (metal) | 0.25 |
Note) Without lubrication
Table 1. Maximum Allowable Load of Snap Cover
| Package | Allowable Load kN{kgf}/1 link | |||||
|---|---|---|---|---|---|---|
| RF06B-SC | RS40-SC | RS50-SC | RS60-SC | RS80-SC | RS100-SC | |
| Standard Series NP Series Lambda Series |
0.03 {3} |
0.05 {5} |
0.07 {7} |
0.10 {10} |
0.15 {15} |
0.25 {25} |
| SS Series | 0.03 {3} |
0.05 {5} |
0.06 {6} |
0.09 {9} |
0.15 {15} |
0.25 {25} |
Table 3. Coefficient of Sliding Friction between Chain (Plastic Cover) and Wearstrip (μ2)
| Plastic cover material | Wearstrip Material | |
|---|---|---|
| Stainless / steel | UHMW-PE | |
| Standard Series Electroconductive |
0.25 | 0.25 |
Note) Without lubrication
Table 5. Speed coefficient (K)
| Chain speed m/min | Speed coefficient K |
|---|---|
| 15 or less | 1 |
| 15 ～ 30 | 1.2 |
| 30 ～ 50 | 1.4 |
| 50 ～ 60 | 1.6 |
[Formulae ]
・SI Unit (kN)
F = (m1 + m2) S・μ1 + 1.1m2・S・μ2 + m1・S'・μ3 ・ G 1000
・Gravity unit (kgf)
F = (m1 + m2) S・μ1 + 1.1m2・S・μ2 + m1・S'・μ3[Determine chain size ]
Using the maximum tension (F) and the speed coefficient (K) shown in Table 5, check whether or not the following formulas are satisfied.
One strand of chains
F × K ≦ Maximum allowable load of the chain
Two strands of chains in a pair
0.6F × K ≦ Maximum allowable load of the chain
1-2. Calculating Required Power
・SI Unit (kN)
P = F・V 60 × η
・Gravity unit (kgf)
P = F・V 6120 × η
