SELECTING SMALL CONVEYOR CHAINS
Selection

Confirming Allowable Load to Roller

Selection of small sized conveyor chains can be made in theAllowable load-carrying rollers of the conveyor chain shall not

following steps, except for some particular cases.

exceed those listed in Table 2 and Table 3.

⑴ Preliminarily determining the type of conveyor chain
Table 2: Allowable Loads to Main Rollers⑵ Confirming allowable load to rollers⑶ Determining maximum tensile force acting on chain⑷ Confirming conveying conditions⑸ Determining the size of conveyor chain

Confirming Conveying conditions⑴ Type of conveyor chain (slat, top roller, carrier, etc.)

Steel Roller

KCM
Chain No.

Plastic Roller
R-Roller

S-Roller

40、2040、2042

20156550、2050、2052

30

2010060、2060、2062

503016080、2080、2082

90

55270100、2100、2102

130

80

400

Unit: kgf/roller（Ｗ）⑵ Conveying direction (horizontal, vertical, slope, etc.)

R-Roller⑶ Weight and dimensions of material conveyed⑷ T otal amount of material conveyed, and frequency ofconveying⑸ Speed of conveyor⑹ Length of conveyor
Table 3: Allowable Load to Load-carrying Roller⑺ Lubrication

KCMChain No.

⑻ Operating conditions of conveyor, such as temperatureand humidity

Preliminarily Determining the Type of Conveyor Chain
T（kgf）＝WT×f×K
Ｔ ：Maximum static tensile force acting to chain

3-type carrier chain, Triple speed chain

6----

40、2040、2042、4-type Triple speed chain

14515

51550、2050、2052、5- Triple speed chain

22720

72060、2060、2062、6-type Triple speed chain

36

1030

103080、2080、2082-1855

1855100、2100、2102-30803080（Ｗ）

WT ：Weight of materials conveyed, except for chain (kgf)

Top Rollers
Triple Speed Side Rollers
Chain Roller Plastic Steel Plastic Steel

Unit: kgf/roller

ｆ ：Coefficient of friction (see Table 4)
Ｋ ：Coefficient of speed (see Table 1)
When two conveyor chains are arranged in parallel,
temporarily determine the type and size of the conveyor
chain of which maximum allowable tensile force is less than

Triple Speed Chain Roller（Ｗ）

that determined by T × 0.6.
Table 1: Speed Factor
Conveyor Chain Speed (m/min)

Speed Factor K15 or less1.0

15〜 301.230〜 50

1.450〜 70

1.6

70〜 902.290〜1102.8

110〜120

3.2

Top Roller（Ｗ）

Side Roller

59

SELECTING SMALL CONVEYOR
Determining Maximum Tensile Force Acting on Chain
Horizontal conveying
T＝（W＋2.1m・C）f1
kW＝Normal conveying

T・V
・15565 η
L（=C）
1

T＝（w1＋m）L1・f1＋w2・L2・f2＋（w2＋m）L2・f3＋1.1m（L1＋L2）
f1
kW＝Accumulated conveying

T・V
1・5565 η(Free flow conveyor)

Determining the Size of Conveyor Chain
maximum allowable tensile force of conveyor chain satisfies
the following formula, by calculating the product of themaximum tensile force (T) acting on the conveyor chain andthe speed factor K (Table 1).
T×K≦Max. allowable tensile force of conveyor chain
When two conveyor chains are arranged in parallel, themaximum tensile force acting on the chain is determined by
T × 0.6.
Table 4: Coefficient of Rolling Friction
Steel Roller

PlasticRoller

Not Lubricated Lubricated

R-Roller

0.12

0.08

0.08

S-Roller

0.21

0.14

0.12

Table 6: f₂: Coefficient of friction between chain and conveyed material when accumulating
KCM Chain Type
Triple speed chain

Coefficient of Sliding Friction (Link Plate)
Not LubricatedLubricated

0.3

0.2

KCM Chain TypeType of Main Roller
Normal/High Load

Chain w/side rollers
Chain w/
top rollers

Plastic Roller
Steel Roller
Steel Roller

Lubricated Not lubricated-0.08

S-Roller-

0.12

R-Roller-0.08

S-Roller

0.14

0.21

R-Roller

0.08

0.12

S-Roller

0.14

0.21

R-Roller

0.08

0.12

Type of Carrying Roller Lubricated Not lubricatedNormal-0.08

High load-0.14

Plastic roller-0.06top rollers

Steel roller

0.06

0.09

Chain w/

Plastic roller-0.06

top rollers

Steel roller

0.06

0.09

Chain w/

Table 5: f₁: Coefficient of friction between chain and rail during conveying
Triple speed chain

L1
Normal conveying■Symbols and Deﬁnitions
Ｔ ＝Max. static tensile force acting on chain（kgf）
Ｖ ＝Conveying speed (chain speed)（m/min）
Ｃ ＝Center-to-center distance between sprockets（ｍ）
Ｗ ＝Max. total weight of conveyed materials on conveyor （kgf）
In case of separated materials: W= C/Conveying interval x Weightof conveyed material（kgf/piece）
L1 ＝Length of conveying portion（ｍ）
w1 ＝Weight of conveyed material on conveying portion （kgf/m）
L2 ＝Length of accumulating portion（ｍ）
w2 ＝Weight of conveyed material on accumulating portion （kgf/m）
ｍ ＝Weight of conveying portion, including chain（kgf/m）
η ＝Mechanical transmission eﬃciency for drive unit, kW: Required power
f1 ＝Coeﬃcient of friction between chain and rail when conveying (see Table 5)
f2 ＝Coeﬃcient of friction between chain and conveyed material when accumulating (see Table 6)
f3 ＝Coeﬃcient of friction between chain and rail when accumulating (see Table 7)

Finally determine the size of the conveyor chain of whichRoller Type

L2
Accumulated conveying

Table 7: f₃: Coefficient of friction between chain and rail when accumulating
KCM Chain Type
Triple speed chain

Type of Main Roller

Not LubricatedGeneral type0.16

High load0.2

NOTE: f₃=f₁, except for triple speed chain60