technical data Synchronous Belts and Belt Sprockets design data

Selection and design (Lock Belt Sprockets S type, S type plated specification)

Check the maximum transmission torque

Follow the steps below to select an S-type Lock Belt Sprockets.

The maximum torque and thrust load are calculated by multiplying the transmission capacity by Service factor.

Maximum torque T max

[SI units]

Tmax (N・m) = 9550 × KW × SF n

Gravity Units

Tmax (kgf・m) = 974 × KW × SF n

Maximum thrust load P max

Pmax (N{kgf}) = Pax × SF

  • KW: Transmission capacity kW
  • SF: Service factor (select from the table below)
  • n: rotation speed r/min
  • Pax: Maximum thrust load N{kgf}

When torque and thrust loads are applied simultaneously, calculate the combined load MR max using the following formula.

MR max = (T max) 2 + (P max × d /2000) 2 N・m{kgf・m} d: Shaft diameter (mm)

Compare the T max or MR max obtained above with the sleeve's transmission torque Mt.​

It can be used if Mt ≧ T max or MR max.

Cannot be used if Mt < T max or MR max.

Service factor SF

Load Condition Service factor SF
Smooth, shock-free transmission Small load inertia
Inertia ratio 1.0 or less		 1.2～1.5
Transmission with light impact During load inertia
Inertia ratio 1.0~3.0		 1.5～2.0
High shock load
Or forward/reverse		 Large load inertia
Inertia ratio 3.0 or more		 2.0～5.0

Considering the axis

Use a shaft made of a material that satisfies the following formula.

δ0.2S ≧ 1.2 × P

δ 0.2S: Yield point of shaft material (MPa) P: Shaft side pressure (Mpa)

When using a hollow shaft, use a shaft with an inner diameter d B that satisfies the following formula.

dB ≦ d × δ0.2S - 2 × P δ0.2S

d: Shaft diameter (mm) δ 0.2S: Yield point of shaft material (MPa)

About the aluminum type

When using at low temperatures (below 0°C) or high temperatures (above 50°C), dimensional changes due to thermal expansion can cause misalignment between the belt and pulley, which can lead to early belt wear. Please contact us for details.

[Reference] Thermal expansion coefficient Specific gravity (g/cm 3)
Aluminum: 23.9 ×10 -6 2.8
Carbon steel: 11.7 ×10 -6 7.8

Approximate mass

For standard installation, the estimated mass is the mass of Standard Stock Belt Sprockets plus the additional mass in the table.

For flat mounting, the approximate mass is Standard Stock Belt Sprockets mass minus the subtraction mass in the table.

Sleeve frame number Installation Method
Standard installation Flat mounting
Additional mass kg Subtracted mass kg
S1 0.1 0.1
S2 0.1 0.1
S3 0.1 0.2
S4 0.2 0.3
S5 0.3 0.4
S6 0.5 0.6
S7 0.9 1.0

Sleeve specifications (Lock Belt Sprockets S type) *Click to open and close.

S type sleeve specification

S type sleeve specification
sleeve Material Carbon steel for machine structures
Heat Treatment Quenching and tempering
Fastening bolt Hexagon socket head bolt (JIS B 1176)
Strength classification: 12.9
Material structural alloy steel
Heat Treatment Quenching and tempering
Surface Treatment Black oxide coating

Sleeve Dimensions

Unit: mm
sleeve
Frame number		 Shaft Hole Diameter
d		 sleeve
Outer diameter
ΦD		 Mounting holes
Pitch circle
diameter
ΦDF		 Taper
Outer diameter
ΦDK		 sleeve
full length
L		 flange
Thickness
T		 Straight section
length
t		 Bolt head
height
k		 Tightening
bolt
size		 screw holes Tightening torque
N･m {kgf･m}
S1 10 32 24 18.6 18 6 2 4 M4×16 M4 4.2 {0.43}
11
12
14
15
16
S2 15 42 32 25.2 22 7 2 5 M5×18 M5 8.3 {0.85}
16
17
18
19
20
22
S3 24 48.5 38.5 31.2 23.5 8 2.5 5 M5×20 M5 8.3 {0.85}
25
28
S4 24 56 46 38.6 26 8 2.5 5 M5×20 M5 8.3 {0.85}
25
28
30
32
35
S5 35 66 56 48.8 29 10 2.5 5 M5×22 M5 8.3 {0.85}
38
40
42
45
S6 48 80 68 60 36 12 3 6 M6×25 M6 16.8 {1.71}
50
55
S7 60 101 86 75.5 40 13 3.5 8 M8×30 M8 40.5 {4.13}
65
70

Tightening bolt usage position

・Use position of fastening bolt ○Open hole ◎Threaded hole (Threaded hole for removing sleeve)

sleeve
Frame number		 Position of tightening bolts sleeve
Frame number		 Position of tightening bolts
S1 Position of tightening bolts S5 Position of tightening bolts
S2 Position of tightening bolts S6 Position of tightening bolts
S3 Position of tightening bolts S7 Position of tightening bolts
S4 Position of tightening bolts

Sleeve specifications (Lock Belt Sprockets S type) *Click to open and close.

Sleeve Performance

sleeve
Frame number		 bolt
Number		 Shaft Hole Diameter
d
mm		 bolt
size		 Bolt tightening torque
​M.A.
N･m {kgf･m}		 Transmission Torque
Mt
N･m {kgf･m}		 Thrust load
Pax
kN {kgf}		 Shaft side pressure
P
MPa {kgf/mm2}		 Hub side pressure
P'
MPa {kgf/mm2}		 Minimum hub diameter mm
Material
SS400 S35C S45C A7075-T6
S1 3 10 M4×16 4.2 {0.43} 43 {4.4} 8.6 {882} 196 {20.0} 111 {11.3} 35 30 29 29
11 48 {4.8} 8.6 {882} 179 {18.2} 111 {11.3} 35 30 29 29
12 52 {5.3} 8.6 {882} 164 {16.7} 111 {11.3} 35 30 29 29
14 60 {6.2} 8.6 {882} 140 {14.3} 111 {11.3} 35 30 29 29
15 65 {6.6} 8.6 {882} 131 {13.4} 111 {11.3} 35 30 29 29
16 69 {7.1} 8.6 {882} 123 {12.5} 111 {11.3} 35 30 29 29
4 10 58 {5.9} 11.5 {1176} 262 {26.7} 148 {15.1} 44 34 32 33
11 63 {6.5} 11.5 {1176} 238 {24.3} 148 {15.1} 44 34 32 33
12 69 {7.1} 11.5 {1176} 218 {22.3} 148 {15.1} 44 34 32 33
14 81 {8.2} 11.5 {1176} 187 {19.1} 148 {15.1} 44 34 32 33
15 86 {8.8} 11.5 {1176} 175 {17.8} 148 {15.1} 44 34 32 33
16 92 {9.4} 11.5 {1176} 164 {16.7} 148 {15.1} 44 34 32 33
6 14 121 {12.3} 17.3 {1764} 281 {28.6} 222 {22.6} Not available 49 42 44
15 130 {13.2} 17.3 {1764} 262 {26.7} 222 {22.6} Not available 49 42 44
16 138 {14.1} 17.3 {1764} 245 {25.0} 222 {22.6} Not available 49 42 44
S2 3 15 M5×18 8.3 {0.85} 105 {10.7} 13.9 {1423} 163 {16.6} 101 {10.3} 45 39 38 38
16 112 {11.4} 13.9 {1423} 152 {15.5} 101 {10.3} 45 39 38 38
17 119 {12.1} 13.9 {1423} 143 {14.6} 101 {10.3} 45 39 38 38
18 126 {12.8} 13.9 {1423} 135 {13.8} 101 {10.3} 45 39 38 38
19 133 {13.5} 13.9 {1423} 128 {13.1} 101 {10.3} 45 39 38 38
20 139 {14.2} 13.9 {1423} 122 {12.4} 101 {10.3} 45 39 38 38
22 153 {15.7} 13.9 {1423} 111 {11.3} 101 {10.3} 45 39 38 38
4 15 139 {14.2} 18.6 {1898} 217 {22.1} 135 {13.8} 54 44 41 42
16 149 {15.2} 18.6 {1898} 203 {20.7} 135 {13.8} 54 44 41 42
17 158 {16.1} 18.6 {1898} 191 {19.5} 135 {13.8} 54 44 41 42
18 167 {17.1} 18.6 {1898} 181 {18.4} 135 {13.8} 54 44 41 42
19 177 {18.0} 18.6 {1898} 171 {17.5} 135 {13.8} 54 44 41 42
20 186 {19.0} 18.6 {1898} 163 {16.6} 135 {13.8} 54 44 41 42
22 205 {20.9} 18.6 {1898} 148 {15.1} 135 {13.8} 54 44 41 42
6 17 237 {24.2} 27.9 {2846} 287 {29.3} 203 {20.7} 124 59 52 54
18 251 {25.6} 27.9 {2846} 271 {27.6} 203 {20.7} 124 59 52 54
19 265 {27.0} 27.9 {2846} 257 {26.2} 203 {20.7} 124 59 52 54
20 279 {28.5} 27.9 {2846} 244 {24.9} 203 {20.7} 124 59 52 54
22 307 {31.3} 27.9 {2846} 222 {22.6} 203 {20.7} 124 59 52 54
S3 3 24 M5×20 8.3 {0.85} 167 {17.1} 13.9 {1423} 102 {10.4} 81 {8.3} 49 44 43 44
25 174 {17.8} 13.9 {1423} 98 {10.0} 81 {8.3} 49 44 43 44
28 195 {19.9} 13.9 {1423} 87 {8.9} 81 {8.3} 49 44 43 44
4 24 223 {22.8} 18.6 {1898} 135 {13.8} 108 {11.0} 56 49 47 47
25 232 {23.7} 18.6 {1898} 130 {13.3} 108 {11.0} 56 49 47 47
28 260 {26.6} 18.6 {1898} 116 {11.8} 108 {11.0} 56 49 47 47
6 24 335 {34.2} 27.9 {2846} 203 {20.7} 162 {16.6} 82 59 55 57
25 349 {35.6} 27.9 {2846} 195 {19.9} 162 {16.6} 82 59 55 57
28 391 {39.9} 27.9 {2846} 174 {17.8} 162 {16.6} 82 59 55 57
S4 3 24 M5×20 8.3 {0.85} 167 {17.1} 13.9 {1423} 85 {8.7} 55 {5.6} 53 50 49 49
25 174 {17.8} 13.9 {1423} 82 {8.3} 55 {5.6} 53 50 49 49
28 195 {19.9} 13.9 {1423} 73 {7.5} 55 {5.6} 53 50 49 49
30 209 {21.3} 13.9 {1423} 68 {7.0} 55 {5.6} 53 50 49 49
32 223 {22.8} 13.9 {1423} 64 {6.5} 55 {5.6} 53 50 49 49
35 244 {24.9} 13.9 {1423} 58 {6.0} 55 {5.6} 53 50 49 49
4 24 223 {22.8} 18.6 {1898} 114 {11.6} 73 {7.5} 58 53 51 52
25 232 {23.7} 18.6 {1898} 109 {11.1} 73 {7.5} 58 53 51 52
28 260 {26.6} 18.6 {1898} 97 {9.9} 73 {7.5} 58 53 51 52
30 279 {28.5} 18.6 {1898} 91 {9.3} 73 {7.5} 58 53 51 52
32 298 {30.4} 18.6 {1898} 85 {8.7} 73 {7.5} 58 53 51 52
35 325 {33.2} 18.6 {1898} 78 {7.9} 73 {7.5} 58 53 51 52
6 24 335 {34.2} 27.9 {2846} 170 {17.4} 110 {11.2} 69 59 57 58
25 349 {35.6} 27.9 {2846} 164 {16.7} 110 {11.2} 69 59 57 58
28 391 {39.9} 27.9 {2846} 146 {14.9} 110 {11.2} 69 59 57 58
30 418 {42.7} 27.9 {2846} 136 {13.9} 110 {11.2} 69 59 57 58
32 446 {45.5} 27.9 {2846} 128 {13.0} 110 {11.2} 69 59 57 58
35 488 {49.8} 27.9 {2846} 117 {11.9} 110 {11.2} 69 59 57 58
8 24 446 {45.5} 37.2 {3795} 227 {23.2} 146 {14.9} 88 68 64 65
25 465 {47.4} 37.2 {3795} 218 {22.3} 146 {14.9} 88 68 64 65
28 521 {53.1} 37.2 {3795} 195 {19.9} 146 {14.9} 88 68 64 65
30 558 {56.9} 37.2 {3795} 182 {18.5} 146 {14.9} 88 68 64 65
32 595 {60.7} 37.2 {3795} 170 {17.4} 146 {14.9} 88 68 64 65
35 651 {66.4} 37.2 {3795} 156 {15.9} 146 {14.9} 88 68 64 65
S5 5 35 M5×22 8.3 {0.85} 407 {41.5} 23.2 {2372} 91 {9.3} 68 {6.9} 70 64 63 63
38 442 {45.1} 23.2 {2372} 84 {8.6} 68 {6.9} 70 64 63 63
40 465 {47.4} 23.2 {2372} 80 {8.2} 68 {6.9} 70 64 63 63
42 488 {49.8} 23.2 {2372} 76 {7.8} 68 {6.9} 70 64 63 63
45 523 {53.4} 23.2 {2372} 71 {7.3} 68 {6.9} 70 64 63 63
8 35 651 {66.4} 37.2 {3795} 146 {14.9} 108 {11.0} 86 74 71 72
38 707 {72.1} 37.2 {3795} 135 {13.8} 108 {11.0} 86 74 71 72
40 744 {75.9} 37.2 {3795} 128 {13.1} 108 {11.0} 86 74 71 72
42 781 {79.7} 37.2 {3795} 122 {12.4} 108 {11.0} 86 74 71 72
45 837 {85.4} 37.2 {3795} 114 {11.6} 108 {11.0} 86 74 71 72
10 35 814 {83.0} 46.5 {4744} 183 {18.7} 135 {13.8} 102 81 77 78
38 883 {90.1} 46.5 {4744} 169 {17.2} 135 {13.8} 102 81 77 78
40 930 {94.9} 46.5 {4744} 160 {16.3} 135 {13.8} 102 81 77 78
42 976 {99.6} 46.5 {4744} 152 {15.6} 135 {13.8} 102 81 77 78
45 1046 {106.7} 46.5 {4744} 142 {14.5} 135 {13.8} 102 81 77 78
S6 6 48 M6×25 16.8 {1.71} 1116 {113.9} 46.5 {4744} 105 {10.7} 87 {8.8} 94 84 81 82
50 1162 {118.6} 46.5 {4744} 101 {10.3} 87 {8.8} 94 84 81 82
55 1279 {130.5} 46.5 {4744} 91 {9.3} 87 {8.8} 94 84 81 82
8 48 1488 {151.8} 62.0 {6326} 140 {14.3} 115 {11.8} 110 93 88 90
50 1550 {158.1} 62.0 {6326} 134 {13.7} 115 {11.8} 110 93 88 90
55 1705 {174.0} 62.0 {6326} 122 {12.4} 115 {11.8} 110 93 88 90
10 48 1860 {189.8} 77.5 {7907} 175 {17.8} 144 {14.7} 134 103 97 99
50 1937 {197.7} 77.5 {7907} 168 {17.1} 144 {14.7} 134 103 97 99
55 2131 {217.4} 77.5 {7907} 152 {15.6} 144 {14.7} 134 103 97 99
12 48 2232 {227.7} 93.0 {9488} 210 {21.4} 173 {17.7} 174 117 107 110
50 2325 {237.2} 93.0 {9488} 201 {20.5} 173 {17.7} 174 117 107 110
55 2557 {260.9} 93.0 {9488} 183 {18.7} 173 {17.7} 174 117 107 110
S7 5 60 M8×30 40.5 {4.13} 2140 {218.4} 71.3 {7280} 115 {11.7} 94 {9.6} 124 109 105 107
65 2319 {236.6} 71.3 {7280} 106 {10.8} 94 {9.6} 124 109 105 107
70 2497 {254.8} 71.3 {7280} 99 {10.1} 94 {9.6} 124 109 105 107
8 60 3424 {349.4} 114.1 {11648} 184 {18.8} 150 {15.3} 177 134 125 128
65 3710 {378.6} 114.1 {11648} 170 {17.3} 150 {15.3} 177 134 125 128
70 3995 {407.7} 114.1 {11648} 158 {16.1} 150 {15.3} 177 134 125 128
10 60 4281 {436.8} 142.7 {14560} 230 {23.5} 188 {19.2} 270 159 143 149
65 4637 {473.2} 142.7 {14560} 212 {21.7} 188 {19.2} 270 159 143 149
70 4994 {509.6} 142.7 {14560} 197 {20.1} 188 {19.2} 270 159 143 149

Sleeve specifications (Lock Belt Sprockets S type plated) *Click to open and close.

S type Plated sleeve specification

S type Plated sleeve specification
sleeve Material Carbon steel for machine structures
Heat Treatment Quenching and tempering
Surface Treatment Electroless nickel-phosphorus plating
Fastening bolt Hexagon socket head bolt (JIS B 1176)
Strength classification: 12.9
Material structural alloy steel
Heat Treatment Quenching and tempering
Surface Treatment Special Coating

Sleeve Dimensions

Unit: mm
sleeve
Frame number		 Shaft Hole Diameter
d		 sleeve
Outer diameter
ΦD		 Mounting holes
Pitch circle
diameter
ΦDF		 Taper
Outer diameter
ΦDK		 sleeve
full length
L		 flange
Thickness
T		 Straight section
length
t		 Bolt head
height
k		 Tightening
bolt
size
S1 10 32 24 18.6 18 6 2 4 M4×16
11
12
14
15
16
S2 17 42 32 25.2 22 7 2 5 M5×20
18
19
20
22
S3 24 48.5 38.5 31.2 23.5 8 2.5 5 M5×20
25
28
S4 30 56 46 38.6 26 8 2.5 5 M5×20
32
35
S5 38 66 56 48.8 29 10 2.5 5 M5×25
40
42
45
S6 48 80 68 60 36 12 3 6 M6×25
50
55
S7 60 101 86 75.5 40 13 3.5 8 M8×30
65
70

Tightening bolt usage position

・Use position of fastening bolt ○Open hole ◎Threaded hole (Threaded hole for removing sleeve)

sleeve
Frame number		 Position of tightening bolts sleeve
Frame number		 Position of tightening bolts
S1
S2
S3		 Position of tightening bolts S5
S7		 Position of tightening bolts
S4 Position of tightening bolts S6 Position of tightening bolts

Sleeve specifications (Lock Belt Sprockets S type plated) *Click to open and close.

Sleeve Performance

sleeve
Frame number		 bolt
Number		 Shaft Hole Diameter
d
mm		 bolt
size		 Bolt tightening torque
​M.A.
N･m {kgf･m}		 Transmission Torque
Mt
N･m {kgf･m}		 Thrust load
Pax
kN {kgf}		 Shaft side pressure
P
MPa {kgf/mm2}		 Hub side pressure
P'
MPa {kgf/mm2}		 Minimum hub diameter mm
Material
SS400 S35C S45C A7075-T6
S1 3 10 M4×16 3.4 {0.35} 43 {4.4} 8.6 {882} 196 {20.0} 111 {11.3} 35 30 29 29
11 48 {4.8} 8.6 {882} 179 {18.2} 111 {11.3} 35 30 29 29
12 52 {5.3} 8.6 {882} 164 {16.7} 111 {11.3} 35 30 29 29
14 60 {6.2} 8.6 {882} 140 {14.3} 111 {11.3} 35 30 29 29
15 65 {6.6} 8.6 {882} 131 {13.4} 111 {11.3} 35 30 29 29
16 69 {7.1} 8.6 {882} 123 {12.5} 111 {11.3} 35 30 29 29
6 14 121 {12.3} 17.3 {1764} 281 {28.6} 222 {22.6} Not available 49 42 44
15 130 {13.2} 17.3 {1764} 262 {26.7} 222 {22.6} Not available 49 42 44
16 138 {14.1} 17.3 {1764} 245 {25.0} 222 {22.6} Not available 49 42 44
S2 3 17 M5×20 6.8 {0.69} 119 {12.1} 13.9 {1423} 143 {14.6} 101 {10.3} 45 39 38 38
18 126 {12.8} 13.9 {1423} 135 {13.8} 101 {10.3} 45 39 38 38
19 133 {13.5} 13.9 {1423} 128 {13.1} 101 {10.3} 45 39 38 38
20 139 {14.2} 13.9 {1423} 122 {12.4} 101 {10.3} 45 39 38 38
22 153 {15.7} 13.9 {1423} 111 {11.3} 101 {10.3} 45 39 38 38
6 17 237 {24.2} 27.9 {2846} 287 {29.3} 203 {20.7} 124 59 52 54
18 251 {25.6} 27.9 {2846} 271 {27.6} 203 {20.7} 124 59 52 54
19 265 {27.0} 27.9 {2846} 257 {26.2} 203 {20.7} 124 59 52 54
20 279 {28.5} 27.9 {2846} 244 {24.9} 203 {20.7} 124 59 52 54
22 307 {31.3} 27.9 {2846} 222 {22.6} 203 {20.7} 124 59 52 54
S3 3 24 M5×20 6.8 {0.69} 167 {17.1} 13.9 {1423} 102 {10.4} 81 {8.3} 49 44 43 44
25 174 {17.8} 13.9 {1423} 98 {10.0} 81 {8.3} 49 44 43 44
28 195 {19.9} 13.9 {1423} 87 {8.9} 81 {8.3} 49 44 43 44
6 24 335 {34.2} 27.9 {2846} 203 {20.7} 162 {16.6} 82 59 55 57
25 349 {35.6} 27.9 {2846} 195 {19.9} 162 {16.6} 82 59 55 57
28 391 {39.9} 27.9 {2846} 174 {17.8} 162 {16.6} 82 59 55 57
S4 4 30 M5×20 6.8 {0.69} 279 {28.5} 18.6 {1898} 91 {9.3} 73 {7.5} 58 53 51 52
32 298 {30.4} 18.6 {1898} 85 {8.7} 73 {7.5} 58 53 51 52
35 325 {33.2} 18.6 {1898} 78 {7.9} 73 {7.5} 58 53 51 52
8 30 558 {56.9} 37.2 {3795} 182 {18.5} 146 {14.9} 88 68 64 65
32 595 {60.7} 37.2 {3795} 170 {17.4} 146 {14.9} 88 68 64 65
35 651 {66.4} 37.2 {3795} 156 {15.9} 146 {14.9} 88 68 64 65
S5 5 38 M5×25 6.8 {0.69} 442 {45.1} 23.2 {2372} 84 {8.6} 68 {6.9} 70 64 63 63
40 465 {47.4} 23.2 {2372} 80 {8.2} 68 {6.9} 70 64 63 63
42 488 {49.8} 23.2 {2372} 76 {7.8} 68 {6.9} 70 64 63 63
45 523 {53.4} 23.2 {2372} 71 {7.3} 68 {6.9} 70 64 63 63
10 38 883 {90.1} 46.5 {4744} 169 {17.2} 135 {13.8} 102 81 77 78
40 930 {94.9} 46.5 {4744} 160 {16.3} 135 {13.8} 102 81 77 78
42 976 {99.6} 46.5 {4744} 152 {15.6} 135 {13.8} 102 81 77 78
45 1046 {106.7} 46.5 {4744} 142 {14.5} 135 {13.8} 102 81 77 78
S6 6 48 M6×25 13.6 {1.39} 1116 {113.9} 46.5 {4744} 105 {10.7} 87 {8.8} 94 84 81 82
50 1162 {118.6} 46.5 {4744} 101 {10.3} 87 {8.8} 94 84 81 82
55 1279 {130.5} 46.5 {4744} 91 {9.3} 87 {8.8} 94 84 81 82
12 48 2232 {227.7} 93.0 {9488} 210 {21.4} 173 {17.7} 174 117 107 110
50 2325 {237.2} 93.0 {9488} 201 {20.5} 173 {17.7} 174 117 107 110
55 2557 {260.9} 93.0 {9488} 183 {18.7} 173 {17.7} 174 117 107 110
S7 5 60 M8×30 32.8 {3.35} 2140 {218.4} 71.3 {7280} 115 {11.7} 94 {9.6} 124 109 105 107
65 2319 {236.6} 71.3 {7280} 106 {10.8} 94 {9.6} 124 109 105 107
70 2497 {254.8} 71.3 {7280} 99 {10.1} 94 {9.6} 124 109 105 107
10 60 4281 {436.8} 142.7 {14560} 230 {23.5} 188 {19.2} 270 159 143 149
65 4637 {473.2} 142.7 {14560} 212 {21.7} 188 {19.2} 270 159 143 149
70 4994 {509.6} 142.7 {14560} 197 {20.1} 188 {19.2} 270 159 143 149