Technical Data  Top chain  Selection

The latter half of this page also introduces the following selection examples:
Click on each item to scroll to the main text.

Plastic modular chain (Wide type) Selection example

Steps 1. Check Conveyance Conditions

  • ・Conveyor width ...Approximately 600 mm
  • ・Conveyor length ...10m
  • ・Conveying speed ...20m/min
  • ・Conveyed object ...350 ml can filled with contents (98kg/m2)
  • ・Accumulate ...Fully accumulated on conveyor
  • ・Temperature ...Ambient Temperature
  • ・Lubrication ...Soapy water

Steps 2. Select Top Plate Material and Chain Type

BTO6-6096-LFB (open type, LFB series) is selected.
(BTO6-6096-LFB)

Steps 3. Select Wearstrip Material

UHMW-PE is selected.
(BTO6-6096-LFB)

Steps 4. Calculate Chain Tension and Power Required

  • m1=Chain mass ...4kg/m
    For a chain width of 609.6 mm
    6.56(catalog value kg/m2)× 609.6/1000 ≒ 4(kg/m)
  • S1=Length of conveying portion ...0m
  • m2=Mass of conveyed objects in conveying portion ...0kg/m
  • S2=Length of accumulating portion ...10m
  • m3=Mass of conveyed objects in accumulating portion ...60kg/m
    For a chain width of 609.6 mm
    98(conditions as above in kg/m2) × 609.6/1000 ≒ 60(kg/m)
  • μ1=Coefficient of dynamic friction between chain and wearstrip ...0.13(See Table 2 )
  • μ2=Coefficient of friction between chain and conveyed objects during accumulation ...0.13(See Table 2 )
  • V=Chain speed ...20m/min
  • η=Transmission efficiency of drive unit ...0.8

SI Unit (kN)

F = 9.80665 × 10-3 × {(2.1 × 4 + 0) × 0 × 0.13
+ (2.1 × 4 + 60) × 10 × 0.13 + 60 × 10 × 0.13} = 1.64kN

P = 1.64 × 20 60 × 0.8 = 0.683kW

Gravity unit

F = (2.1 × 4 + 0) × 0 × 0.13 + (2.1 × 4 + 60) × 10 × 0.13
+ 60 × 10 × 0.13 = 166.9kgf

P = 166.9 × 20 6120 × 0.8 = 0.682kW

Steps 5. Determine Chain Type and Chain Width

Tension applied per 1 meter of chain width
F' = 1000 × 1.64 609.6
= 2.69kN/m {274kgf/m}

Since the above value exists below the appropriate line in the allowable load graphs can be used. (Refer to the allowable load graphs on product page.)

Determine Chain Type and Chain Width

Steps 6. Select sprockets, shafts, and bearing units

Select sprockets, shafts, and bearing units

Bearing support span = Chain width (610) + 150 = 760mm

In accordance with “the tension applied per 1 meter of chain width (F')”, “the bearing support span graph”, and tables 13, 37, and 38 (Type of Shafts and Corresponding Bearing Units), one of the following combinations of shaft and bearing unit should be used.

10T 38 hexagonal shaft Bearing unit φ25 to φ35
or
24T 40 square shaft Bearing unit φ30 to φ35
is to be used.

Steps 7. Calculate Chain Tension and Power Required

1) Chain tension rate F1 (%) verification

F1 = 100 × 2.69 12.8 = 21.0%

2) Determine sprocket locations

Since F1 is 50% or less, the sprockets should be installed with a center distance as shown below. (Refer to the section 4-3 (8)).

Determine sprocket locations

WT0700 series Selection example

Nose bar on driven side

Nose bar on driven side

●Calculation formula (SI units: kN)

・Tension at return-way

[Tension at section A :FA]

FA = m1Lμ1fn × 9.80665 × 10-3

・Tension at carry-way

[Tension at section B :FB]

FB = FA + {(m1 + m2) Lμ1 + m2LSμ2} × 9.80665 × 10-3

・Chain load

F = FB

Note: LS = 0 when there is no accumulation of conveyed products.

●Calculation example (SI units)

Usage conditions
Chain Type WT0705-W300-LFG
(m1=5.9×0.3=1.77kg/m)
Chain width 300mm
Layout L=2m
Chain speed V=15m/min
Conveyed object 500-ml aluminum can (filled)
Conveyed product mass (per 1-meter unit of length) m2=139kg/m2(523 g/piece )
×0.3m=41.7kg/m
Rail UHMW-PE (Plastic rail)
Accumulation distance Ls=2m
Lubrication For dry conditions
Operating Ambient Temperature 20℃
Coefficient of dynamic friction between chain and wearstrip μ1=0.2
Dynamic coefficient of friction between chain and conveyed product μ2=0.2
Nose bar coefficient fn=1.8

・Tension at return-way

[Tension at section A :FA]

FA = 1.77 × 2 × 0.2 × 1.8 × 9.80665 × 10-3 = 0.0125kN

・Tension at carry-way

[Tension at section B :FB]

FB = 0.0125 + {(1.77 + 41.7) × 2 × 0.2 + 41.7 × 2 × 0.2} × 9.80665 × 10-3 = 0.35kN

・Determine acceptability

Max. allowable load ≧FB'

Converted to per meter of chain width

FB' = 1000 × FB 300 = 1.17(kN/m)

From the allowable load graph, maximum allowable tension is 2.5 (kN/m).

2.5(kN/m)≧1.17(kN/m)

Selected chain is acceptable.

Nose bar on front end

Nose bar on front end

●Calculation formula (SI units: kN)

・Tension at return-way

[Tension at section A :FA]

FA = 1.1m1Lμ1 × 9.80665 × 10-3

・Tension at carry-way

[Tension at section B :FB]

FB= [FA + {(m1 + m2) Lμ1 + m2LSμ2} × 9.80665 × 10-3] × fn

・Chain load

F = FB

Note: LS = 0 when there is no accumulation of conveyed products.

●Calculation example (SI units)

Usage conditions
Chain Type WT0705-W300-LFG
(m1=5.9×0.3=1.77kg/m)
Chain width 300mm
Layout L=2m
Chain speed V=15m/min
Conveyed object 500-ml aluminum can (filled)
Conveyed product mass (per 1-meter unit of length) m2=139kg/m2(523 g/piece )
×0.3m=41.7kg/m
Rail UHMW-PE (Plastic rail)
Accumulation distance Ls=2m
Lubrication For dry conditions
Operating Ambient Temperature 20℃
Coefficient of dynamic friction between chain and wearstrip μ1=0.2
Dynamic coefficient of friction between chain and conveyed product μ2=0.2
Nose bar coefficient fn=1.8

・Tension at return-way

[Tension at section A :FA]

FA = 1.1 × 1.77 × 2 × 0.2 × 9.80665 × 10-3 = 0.0077kN

・Tension at carry-way

[Tension at section B :FB]

FB = [0.0077 + {(1.77 + 41.7) × 2 × 0.2 + 41.7 × 2 × 0.2} × 9.80665 × 10-3] × 1.8 = 0.62kN

・Determine acceptability

Max. allowable load ≧FB'

Converted to per meter of chain width

FB' = 1000 × FB 300 = 2.07(kN/m)

From the allowable load graph, maximum allowable tension is 2.5 (kN/m).

2.5(kN/m)≧2.07(kN/m)

Selected chain is acceptable.

Nose bar on both ends

Nose bar on both ends

●Calculation formula (SI units: kN)

・Tension at return-way

[Tension at section A :FA]

FA = m1Lμ1fn × 9.80665 × 10-3

・Tension at carry-way

[Tension at section B :FB]

FB= [FA + {(m1 + m2) Lμ1 + m2LSμ2} × 9.80665 × 10-3] × fn

・Chain load

F = FB

Note: LS = 0 when there is no accumulation of conveyed products.

●Calculation example (SI units)

Usage conditions
Chain Type WT0705-W300-LFG
(m1=5.9×0.3=1.77kg/m)
Chain width 300mm
Layout L=2m
Chain speed V=15m/min
Conveyed object 500-ml aluminum can (filled)
Conveyed product mass (per 1-meter unit of length) m2=139kg/m2(523 g/piece )
×0.3m=41.7kg/m
Rail UHMW-PE (Plastic rail)
Accumulation distance Ls=2m
Lubrication For dry conditions
Operating Ambient Temperature 20℃
Coefficient of dynamic friction between chain and wearstrip μ1=0.2
Dynamic coefficient of friction between chain and conveyed product μ2=0.2
Nose bar coefficient fn=1.8

・Tension at return-way

[Tension at section A :FA]

FA = 1.77 × 2 × 0.2 × 1.8 × 9.80665 × 10-3 = 0.0125kN

・Tension at carry-way

[Tension at section B :FB]

FB = [0.0125 + {(1.77 + 41.7) × 2 × 0.2 + 41.7 × 2 × 0.2} × 9.80665 × 10-3] × 1.8 = 0.63kN

・Determine acceptability

Max. allowable load ≧FB'

Converted to per meter of chain width

FB' = 1000 × FB 300 = 2.1(kN/m)

From the allowable load graph, maximum allowable tension is 2.5 (kN/m).

2.5(kN/m)≧2.1(kN/m)

Selected chain is acceptable.

fn(Nose bar coefficient )

Lubrication Nose bar coefficient fn
Sliding Series
For dry conditions 1.8
Soapsuds 1.35

WT1500 series, WT1510 series and BTN5 Selection example

Nose bar on driven side

Nose bar on driven side

●Calculation formula (SI units: kN)

・Tension at return-way

[Tension at section A :FA]

FA = m1Lμ1fn × 9.80665 × 10-3

・Tension at carry-way

[Tension at section B :FB]

FB = FA + {(m1 + m2) Lμ1 + m2LSμ2} × 9.80665 × 10-3

・Chain load

F = FB

Note: LS = 0 when there is no accumulation of conveyed products.

●Calculation example (SI units)

Usage conditions
Chain Type WT1506-K30-ALF
(m1=6.7×0.762=5.1kg/m)
Chain width 762mm
Layout L=4m
Chain speed V=15m/min
Conveyed object 500-ml aluminum can (filled)
Weight of conveyed goods (per 1-meter unit of length ) m2=139kg/m2(523 g/piece )
×0.762m=106kg/m
Rail Ultra high molecular weight polyethylene (Plastic rail )
Accumulation distance Ls=4m
Lubrication For dry conditions
Operating Ambient Temperature 20℃
Coefficient of dynamic friction between chain and wearstrip μ1=0.15
Dynamic coefficient of friction between chain and conveyed product μ2=0.14
Nose bar coefficient fn=1.35(bearing/roller type )

・Tension at return-way

[Tension at section A :FA]

FA = 5.1 × 4 × 0.15 × 1.35 × 9.80665 × 10-3 = 0.04kN

・Tension at carry-way

[Tension at section B :FB]

FB = 0.04 + {(5.1 + 106) × 4 × 0.15 + 106 × 4 × 0.14} × 9.80665 × 10-3 = 1.28kN

・Determine acceptability

Max. allowable load ≧FB'

Converted to per meter of chain width

FB' = 1000 × FB 762 = 1.68(kN/m)

From the allowable load graph, maximum allowable tension is 2.5 (kN/m).

10.5(kN/m)≧1.68(kN/m)

Selected chain is acceptable.

Nose bar on front end

Nose bar on front end

●Calculation formula (SI units: kN)

・Tension at return-way

[Tension at section A :FA]

FA = 1.1m1Lμ1 × 9.80665 × 10-3

・Tension at carry-way

[Tension at section B :FB]

FB= [FA + {(m1 + m2) Lμ1 + m2LSμ2} × 9.80665 × 10-3] × fn

・Chain load

F = FB

Note: LS = 0 when there is no accumulation of conveyed products.

●Calculation example (SI units)

Usage conditions
Chain Type WT1506-K30-ALF
(m1=6.7×0.762=5.1kg/m)
Chain width 762mm
Layout L=4m
Chain speed V=15m/min
Conveyed object 500-ml aluminum can (filled)
Weight of conveyed goods (per 1-meter unit of length ) m2=139kg/m2(523 g/piece )
×0.762m=106kg/m
Rail Ultra high molecular weight polyethylene (Plastic rail )
Accumulation distance Ls=4m
Lubrication For dry conditions
Operating Ambient Temperature 20℃
Coefficient of dynamic friction between chain and wearstrip μ1=0.15
Dynamic coefficient of friction between chain and conveyed product μ2=0.14
Nose bar coefficient fn=1.35(bearing/roller type )

・Tension at return-way

[Tension at section A :FA]

FA = 1.1 × 5.1 × 4 × 0.15 × 9.80665 × 10-3 = 0.03kN

・Tension at carry-way

[Tension at section B :FB]

FB = [0.03 + {(5.1 + 106) × 4 × 0.15 + 106 × 4 × 0.14} × 9.80665 × 10-3] × 1.35 = 1.71kN

・Determine acceptability

Max. allowable load ≧FB'

Converted to per meter of chain width

FB' = 1000 × FB 762 = 2.24(kN/m)

From the allowable load graph, maximum allowable tension is 10.5 (kN/m).

10.5(kN/m)≧2.24(kN/m)

Selected chain is acceptable.

Nose bar on both ends

Nose bar on both ends

●Calculation formula (SI units: kN)

・Tension at return-way

[Tension at section A :FA]

FA = m1Lμ1fn × 9.80665 × 10-3

・Tension at carry-way

[Tension at section B :FB]

FB= [FA + {(m1 + m2) Lμ1 + m2LSμ2} × 9.80665 × 10-3] × fn

・Chain load

F = FB

Note: LS = 0 when there is no accumulation of conveyed products.

●Calculation example (SI units)

Usage conditions
Chain Type WT1506-K30-ALF
(m1=6.7×0.762=5.1kg/m)
Chain width 762mm
Layout L=4m
Chain speed V=15m/min
Conveyed object 500-ml aluminum can (filled)
Weight of conveyed goods (per 1-meter unit of length ) m2=139kg/m2(523 g/piece )
×0.762m=106kg/m
Rail Ultra high molecular weight polyethylene (Plastic rail )
Accumulation distance Ls=4m
Lubrication For dry conditions
Operating Ambient Temperature 20℃
Coefficient of dynamic friction between chain and wearstrip μ1=0.15
Dynamic coefficient of friction between chain and conveyed product μ2=0.14
Nose bar coefficient fn=1.35(nose bar/roller type )

・Tension at return-way

[Tension at section A :FA]

FA = 5.1 × 4 × 0.15 × 1.35 × 9.80665 × 10-3 = 0.04kN

・Tension at carry-way

[Tension at section B :FB]

FB = [0.04 + {(5.1 + 106) × 4 × 0.15 + 106 × 4 × 0.14} × 9.80665 × 10-3] × 1.35 = 1.72kN

・Determine acceptability

Max. allowable load ≧FB'

Converted to per meter of chain width

FB' = 1000 × FB 762 = 2.26(kN/m)

From the allowable load graph, maximum allowable tension is 10.5 (kN/m).

10.5(kN/m)≧2.26(kN/m)

Selected chain is acceptable.

fn(Nose bar coefficient )

Lubrication Nose bar coefficient fn
Sliding Series bearing/roller type
For dry conditions 1.8 1.35
Soapsuds 1.35

WT2525VG-K Selection example

Forward/reverse bottom drive selection example

Forward/reverse bottom drive selection example

●Calculation formula (SI units: kN)

・Tension at return-way

[Tension at section A :FA]

FA = 1.1m1L1μ1 × 9.80665 × 10-3

・Tension at carry-way

[Tension at section B :FB]

FB = 1.1{FA + (m1 + m2) × Lμ1 × 9.80665 × 10-3}

・Tension at return-way (drive )

[Tension at section C :FC]

FC = FB + m1L2μ1 × 9.80665 × 10-3

・Chain load

F = FC

●Calculation example (SI units)

Usage conditions
Chain Type WT2525VG-K36-G
(m1=9.5×0.9144=8.7kg/m)
Chain width 914.4mm
Layout L=10m, L1=6m, L2=4m
Chain speed V=10m/min
Conveyed object cardboard sheet 900mm×1800mm×5mm
106.4kg/m2=861.8g/sheet x 200 sheets (height 1m)
Weight of conveyed goods (per 1-meter unit of length ) m2=106.4kg/m2×0.9144m
=97.3kg/m
Rail Ultra high molecular weight polyethylene (Plastic rail )
Lubrication For dry conditions
Operating Ambient Temperature 20℃
Coefficient of dynamic friction between chain and wearstrip μ1=0.25

・Tension at return-way (Driven Side )

[Tension at section A :FA]

FA = 1.1 × 8.7 × 6 × 0.25 × 9.80665 × 10-3 = 0.14kN

・Tension at carry-way

[Tension at section B :FB]

FB = 1.1 {0.14 + (8.7 + 97.3) × 10 × 0.25 × 9.80665 × 10-3} = 3.0kN

・Tension at carry-way

[Tension at section C :FC]

FC = 3.0 + 8.7 × 4 × 0.25 × 9.80665 × 10-3 = 3.09kN

・Determine acceptability

Max. allowable load ≧FB'

Converted to per meter of chain width

FB' = 1000 × FB 914.4 = 3.34(kN/m)

From the allowable load graph, maximum allowable tension is 12.8 (kN/m).

12.8(kN/m)≧3.34(kN/m)

Selected chain is acceptable.

WT1515F-W, WT1516F-W Selection example

Calculating inclined movement (horizontal + inclined + horizontal)

Basically, it is the same as for inclined movement (inclined only). The tension acting on the curve part between horizontal and inclined is corrected using the angle coefficient.

A calculation example is shown for the conveyor route below.

Calculating inclined movement (horizontal + inclined + horizontal)

●Calculation formula (SI units: kN)

L2 = r × αS  L4 = r × αS

・Tension at return-way

[Tension at section A :FA]

FA = m1(L1 + L2) μ1αL × 9.80665 × 10-3
L2 = r × αS

[Tension at section B :FB]

FB = FA + m1(Lh3μ1 - Lv3) × 9.80665 × 10-3
If FB < 0, FB = 0

[Tension at section C :FC]

FC = 1.1 × (FB + m1(L4 + L5)) × 9.80665 × 10-3αL
L4 = r × αS

・Tension at carry-way

[Tension at section D :FD]

FD = {FC + (m1 + m2)(L4 + L5) μ1} × 9.80665 × 10-3αL
L4 = r × αS

[Tension at section E :FE]

FE = FD + (m1 + m2)(Lh3μ1 + Lv3) × 9.80665 × 10-3

[Tension at section F :FF]

FF = {FE + (m1 + m2)(L1 + L2) μ1} × 9.80665 × 10-3αL
L2 = r × αS

・Chain load

F = FF

Force acting on float-preventive attachment (tab)

When attaching a float-preventive attachment (tab) to a chain, calculate the force Ft applied to one float-preventive attachment (tab).

The chain floats on the curve part between horizontal and inclined. The floating force is maximum in the L4 part.

Ft = FD sin θ/2 nt × 1000

nt = Total number of float-preventive attachments (tabs) in L4 section

nt = L4 30 × (Formation points of tabs in the chain width direction )

Can be used if the force Ft applied to one float-preventive attachment (tab) is 240 N or less.

Ft < 240N

●Calculation example (SI units)

Usage conditions
Chain Type WT1515T-F-W400-LFG-10L-FM50N2
(m1=6.7×0.4=2.7kg/m)
Chain width 400mm
Layout L1=0.7m Lv3=1.5m Lh3=0.866m
L5=0.7m
From r=0.5m and angle 60°, length factor αs=1.0
L2=L4=0.5×1.0=0.5m (Total lift 2m)
Inclination angle θ=60°
Chain speed V=9m/min
Conveyed object Aluminum parts, 20mm cube, 120 pieces to be scraped in one place
Conveyed product mass (per 1-meter unit of length) m2=30kg/m2(15g/piece )×0.4m
=12kg/m
Rail Ultra high molecular weight polyethylene (Plastic rail )
Accumulation distance Ls=4m
Lubrication For dry conditions
Operating Ambient Temperature 20℃
Coefficient of dynamic friction between chain and wearstrip μ1=0.2 (Angle factor αL=1.25)

・Tension at return-way

[Tension at section A :FA]

FA = 2.7 (0.7 + 0.5) 0.2 × 1.25 × 9.80665 × 10-3

[Tension at section B :FB]

FB = 0.0079 + 2.7 (0.866 × 0.2 - 1.5) × 9.80665 × 10-3 = -0.027kN
From FB < 0, FB = 0kN

[Tension at section C :FC]

FC= 1.1 × (0 + 5.1(0.5 + 0.7)) 1.25 × 9.80665 × 10-3αL = -0.083kN

・Tension at carry-way

[Tension at section D :FD]

FD={0.083 + (2.7 + 12)(0.5 + 0.7) 0.2 × 9.80665 × 10-3} × 1.25 = 0.15kN

[Tension at section E :FE]

FE = 0.15 + (2.7 + 12)(0.866 × 0.2 + 1.5) × 9.80665 × 10-3 = 0.39kN

[Tension at section F :FF]

FF = {0.39 + (2.7 + 12)(0.7 + 0.5) 0.2 × 9.80665 × 10-3αL = 0.53kN

・Chain load

F = 0.53kN

・Determine acceptability

Max. allowable load ≧ F

F' = 1000 × F 400 = 1.3(kN/m)

From the allowable load graph, maximum allowable tension is 10.5 (kN/m).

10.5(kN/m)≧1.3(kN/m)

Selected chain is acceptable.

・Force acting on float-preventive attachment (tab)

Ft = 0.15 × sin(60/2) 13 × 1000 = 5.8kN

nt = 400 30 = 13 places

Since the force applied to one float preventive attachment (tab) is 5.8N, 5.8N <240N, it can be used.

WT3816-K Selection example

Special conveyors (pasteurizers, warmers, coolers)

Special conveyors (pasteurizers, warmers, coolers)

●Calculation formula (SI units: kN)

・Tension at return-way

[Tension at section A :FA]

FA = 1.1m1Lμ1 × 9.80665 × 10-3

・Tension at carry-way

[Tension at section B :FB]

FB = FA + (m1 + m2) L1μ1 × 9.80665 × 10-3

[Tension at section C :FC]

FC = FB + {(m1 + m2) L2μ1 + m2L3μ2} × 9.80665 × 10-3

●Calculation example (SI units)

Usage conditions
Chain Type WT3816-K2000-HTW
(m1=9.8×2=19.6kg/m)
Chain width 2000mm
Layout L=25m, L1=10m, L2=15m
Chain speed V=1m/min
Conveyed object 1,500-ml PET bottle
Conveyed product mass (per 1-meter unit of length) m2=200kg/m2(1530 g/piece )×2m
=400kg/m
Rail Stainless steel (polished)
Accumulation distance L3=0.5m
Lubrication Water (hot water)
Operating Ambient Temperature Hot water (85˚C max. )
Coefficient of dynamic friction between chain and wearstrip μ1=0.35
Dynamic coefficient of friction between chain and conveyed product μ2=0.35

・Tension at return-way

[Tension at section A :FA]

FA = 1.1 × 19.6 × 25 × 0.35 × 9.80665 × 10-3 = 1.85kN

・Tension at carry-way

[Tension at section B :FB]

FB = 1.85 + (19.6 + 400) × 10 × 0.35 × 9.80665 × 10-3 = 16.3kN

[Tension at section C :FC]

FC = 16.3 + {(19.6 + 400) × 15 × 0.35 + 400 × 0.5 × 0.35} × 9.80665 × 10-3 = 38.6kN

・Determine acceptability

A determination is made for each temperature range
Max. allowable load ≧ F

・At 85°C

Working tension F = FB'

Converted to per meter of chain width

FB' = 1000 × FB 2000 = 8.15(kN/m)

From the allowable load graph, maximum allowable tension at 85°C is 8.3 (kN/m).

8.3(kN/m)≧8.15(kN/m)

Selected chain is acceptable.

・At 40°C

Working tension F = FC'

Converted to per meter of chain width

FC' = 1000 × FC 2000 = 19.3(kN/m)

From the allowable load graph, maximum allowable load at 40°C is 20 (kN/m).

20(kN/m)≧19.3(kN/m)

Selected chain is acceptable.

Selected chain can be used in each temperature range.