I - Selection Procedure for Double Plus ® , Outboard Roller and Top Roller Chain
Table 3 f 1 - Coefficient of Friction between chain sand rail when conveying
6 - Determination of Chain Size Multiply the maximum chain tension (T) by the speed coefficient (K) listed in Table 6 and verify with the following formula T • K ≤ Maximum allowable chain tension Note - When there are two strandes, the maximum chain tension should be T • 0.6 ≤ Maximum allowable chain tension ■ Ambient Temperature Range Suggested ambient temperature range is between 14°F and 140°F, for which standard lubrication is suggested. Special lubrication is required for temperatures between 140°F and 300°F. For temperatures above 300°F please consult Tsubaki engineering.
Table 2 - Maximum Allowable Roller Load of Base Chain
Chain Type
Type of Roller on Base Chain
Dry
Lubricated
Type of Roller for transfer Standard Roller “S” Oversized Roller “R” Standard Roller “S” Oversized Roller “R”
40 C2040
50 C2050
60 C2060
80 C2080
100 C2100
Chain
1 - Confirmation of operating conditions for free flow conveyors The Following information is needed in order to select an appropriate chain for free flow conveyors: 1 - Material weight, dimension and quantity of the conveyed object (including pallet). 2 - Conveyor speed 3 - Conveyor length (the length for accumulating and transferring portion respectively). 4 - Lubrication requirements and environment. 2 - Tentative selection of chain size T = W T ●• f •● K W T = Total weight of conveyed object except chain (lbs) f = Coefficient of friction f = f 2 + f 3 (See page 264, Tables 4 and 5 or Table 8) K = Chain speed coefficient (See page 264, Table 6) Note: In the case where two matched strands are to be operated, the chain’s maximum allowable tension (shown in Table 7, page 264) should be compared with T • 0.6 to decide the chain type and size. 3 - Confirmation of the maximum allowable roller load The maximum allowable roller load for conveyed objects should not exceed the figures shown in Table 1 below. However, maximum allowable roller load for the base chain should be checked using Table 2.
Double Plus Chain
Regular and high friction type
0.08
33
44
66
121
176
“S” Roller
0.21
0.14
Steel Roller
Steel Roller
“R” Roller
0.12
0.08
Outboard Roller Chain
143
220
352
594
880
“S” Roller
0.12
Plastic roller
“R” Roller
0.08
4
7
11
Top Roller Chain (Single Strand)
Poly-Steel
0.25
44
66
110
198
286
Top Roller Chain
“S” Roller
0.21
0.14
Steel Roller
“R” Roller
0.12
0.08
Poly Steel 13 Note - The above figures for Poly-Steel show the maximum allowable load per plastic inner link. 4 9
■ Use of Chain Guide
Table 4 f 2 - Coefficient of Friction between chain and Conveyed Object when Accumulating Chain Type Type of Roller on Base Chain Dry
Lubricated
4 - Calculation of maximum chain tension (T)
Reg ular Type
0.10
Double Plus Chain
High Friction Type
0.15
Plastic Outboard Roller
0.06
Outboard Roller Chain
Plastic brake outboard roller
0.10
Steel outboard roller
0.09
0.06
Plastic top roller
0.06
Top Roller Chain
Note: 1 – When using plastic brake outboard roller chain, the rollers of the base chain on the return side should be supported by the rail in the same way as the conveying side. 2 – When using Poly-Steel chain with the outboard rollers, the guide should support the bottom surface of the links.
Steel top roller
0.09
0.06
Table 1 - Maximum Allowable Roller Load For Conveyed Objects
Note: These factors are for reference only.
Type of Guide Rail
Chain Type
C2030VRP C2040VRP C2050VRP C2060VRP C2080VRP
5 - Calculation of required power (HP)
P: Maximum number of pallets o n conveyor T: Maximum chain tension (lbs) L 2 : Length of accumulating portion (ft) W 2 : Weight of conveyed objects in accumulating portion (Lbs/ft) L 1 : Length of conveying portion (ft) W 1 : Weight of conveyed objects in conveying portion f 1 : Coefficient of friction between chain and rail when conveying f 2 : Coefficent of friction between chain and conveyed object when accumulating f 3 : Coefficient of friction between chain and rail when accumulating M: Weight of chain and slat, etc. (lbs/ft)
Table 5 f 3 - Coefficient of Friction between Chain and Rail when Accumulating Chain Type Type of Roller on Base Chain Dry
Aluminum
26
40
53
67
Double Plus Chain
Aluminum with Steel Rail
53
80
107
134
201
Lubricated
This is the load for two strands of Double-Plus chain Note - When using aluminum frame with steel rail, the maximum allowable for VR series is twice that of VRP series
Table 7 - Maximum Allowable Chain Tension (Lbs)
Regular Type
0.20
Double Plus ® Chain
High friction type
0.25
Type of Roller on Base Chain
Chain Type
40 C2040
50 C2050
60 C2060
80 C2080
100 C2100
C2030
Note : For all chains except Double Plus ® chain, f
3 equals f 1 . These factors are for reference only.
Regular
120
200
310
460
1190
Table 6 - Chain Speed Coefficient
Lbs/Roller
Double Plus ® Chain
High Friction
60
100
155
230
595
Type of Roller for transfer Plastic Outboard Roller Steel Outboard Roller
40 C2040
50 C2050
60 C2060
80 C2080
100 C2100
Chain Speed ft/min Chain Speed Coefficient (K)
Chain
Stainless Steel
60
100
155
230
595
Steel Roller
220
350
550
840
Hp: Required power (Hp) V: Chain speed (ft/min) ᵑ: Transmission efficiency of drive unit L: Length of pallet
0 - 50
1.0
11
15
30
55
66
Steel Roller
595
970
1410 2400 3835
50 - 100
1.2
Outboard Roller Chain
Outboard Roller Chain
Plastic Roller
100
155
230
400
575
100 - 160
1.4
33
44
66
121
176
Poly-Steel
100
155
200
160 - 230
1.6
Plastic Top Roller Steel Top Roller
11
15
30
55
66
Steel Roller
595
970
1410 2400 3835
230 - 300
2.2
Top Roller Chain (Single Strand)
Top Roller Chain
Calculate the maximum chain tension (T) with the following formula referring to Table 3 and Tables 4 and 5 (or Table 8) on page XXX
Plastic Roller
100
155
230
400
575
300 - 360
2.8
33
44
66
121
176
360 - 400
3.2
Table 8 - Coefficient of Friction Double Plus ® “VR” Steel Roller
Note: These factors are for reference only.
Double Pitch Double Plus ® Steel Roller
Large Size Double Plus ®
Coefficient of Friction
Suggested chain speed is as follows: Double Plus ® - 50ft/min or less
In general, free flow conveyors should have two matched strands of chain and in this case, the chain weight should be for two strands of chain. T, calculated above is the maximum chain tension for two strands of chain.
Coefficient of friction between chain and rail when conveying Coefficient of friction between chain and conveyed object when accumulating Coefficient of friction between chain and rail when accumulating
f1
0.05
0.05
0.05
0.05
Plastic Roller Chain - 230ft/min or less Poly-Steel Chain - 230ft/min or less When chain speed exceeds the above, consult Tsubaki engineering
f2
0.10
0.15
0.10
0.15
f3
0.10
0.25
0.05
0.15
Note - Tsubaki suggests lubricating steel roller and “VR” type chains
263
264
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