Page 650 - MiSUMi 2025
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7 Timing Pulleys S3M 7
Timing Pulleys & Idlers & Belts / Round Belt Pulleys & Idlers & Belts S3M Type Pulley M Material Flange S Surface Treatment Round Belt Pulleys & Idlers & Belts Timing Pulleys & Idlers & Belts /
3mm
E-HTPB
Black Anodized
Timing Pulleys E-HTPA Aluminum Alloy Clear Anodized Pulleys Timing
E-HTPK
Hard Anodized*
E-HTPM Black Oxide Film
P.07-007 General Structural Steel P.07-007
E-HTPP or Carbon Steel Electroless Nickel Plating
Idlers E-HTPS Stainless Steel - Idlers
*Film hardness for hard anodized treatment is 300 HV min.
P.07-033 QPulley Shape Type & Nominal Width (* dimension) P.07-033
Timing Belts 4 A Shape 4 B Shape 2-M 4 K Shape Standard Tooth Profile S3M060 A B K 7 11 19 - Timing Belts
W
A
Pulley Shape
L
Belt Type
0.381
*W
*L
1.95
*W
*A
2.0
2.0
0.254
P.07-055 W/2 2-M 2.0 *A 2.0 4.5 2.0 *A *L 5 2-M R0.28 R1.975 R0.15 1.11 S3M100 A B K 11 15 23 - P.07-055
Round Belt Pulleys & Idlers & Belts P.D. O.D. dH7 (t1.0) E F P.D. O.D. dH7 (t1.0) D E F F P.D. O.D. E dH7 (t1.0) E D Tooth groove dimensions S3M150 A B K 17 21 29 - Idlers & Belts Round Belt Pulleys &
slightly vary according to
the number of teeth.
(Pitch: 3.0mm)
P.07-088 Threaded Hole Size Table P.07-088
(Shaft Bore Specs: P · N )
QShaft Bore Specs. dH7 Shaft Bore ID M (Coarse Thread)
5 H Round Hole 5 P Round Hole + Tap 5 N New JIS Keyway + Tap 4~5 M3
6~17
QKeyway Size 18~33 M4
M5
bjs9 t 34~42 M6
E For more tap dimensions, refer to the
(120°)
2-R0.2 MISUMI website.
or Less
N/NK: New JIS (B1301) keyway size table
Shaft Bore Keyway
HH7 PH7 N H7 dH7 Spec. Shaft Bore Tolerance b js9 t Tolerance
E No tapped holes or set E For Shape A pulley, the set N 8 + 0.015 3 ±0.0125 1.4
screws. screw hole is set around 120° N 10 0
to avoid interference with the NK 10 + 0.015 4 ±0.0150 1.8
tooth top. 0
N 11~12 4 1.8 + 0.1
0
N 13~17 + 0.018 5 ±0.0150 2.3
0
N 18 6 2.8
N 19~22 + 0.021 6 ±0.0150 2.8
0
E For more keyway dimensions, refer to the
MISUMI website.
Part Number 4Pulley 5Shaft Bore Specs. H 5Shaft Bore Specs. P 5Shaft Bore Specs. N/NK
1Type 2Number of 3Belt Type Shape Hole Dia. d Hole Dia. d Hole Dia. d P.D. O.D. F E
Teeth (1mm increments) (1mm increments) (1mm increments)
14 4·5·6 4 13.37 12.61 16 10
15 4~7 4·4.5·5 14.32 13.56 18 11
16 15.28 14.52
18 4~9 4~6 17.19 16.43 20 13
19 - 18.14 17.38
(Aluminum Alloy) 4~10 4·5·6 22 14
E-HTPA 20 19.1 18.34
4~8
E-HTPB 22 4~12 4~10 21.01 20.25 25 16
22.92 22.16
24
E-HTPK
25 4~14 4~11 8~11·NK10 23.87 23.11 28 18
26 5~14 5~11 24.83 24.07
(General Structural Steel S3M060
or Carbon Steel) 28 S3M100 A 5~16 5~13 8~13·NK10 26.74 25.98 30 20
S3M150
E-HTPM 30 6~19 6~15 8~14·NK10 28.65 27.89 32 23
8~17·NK10
30.56
32
35
29.8
25
6~21
6~17
E-HTPP
34 6~24 6~18 8~18·NK10 32.47 31.71 40 28
(Stainless Steel) 36 8~19·NK10 34.38 33.62
E-HTPS 40 8~28 8~23 8~23·NK10 38.2 37.44 44 32
44 8~32 8~26 8~25·NK10 42.02 41.25 48 36
48 8~34 8~28 8~27·NK10 45.84 45.07 50 38
50 8~36 8~30 8~29·NK10 47.75 46.98 52 40
60 8~42 8~34 8~35·NK10 57.3 56.53 61 46
72 8~54 8~46 8~45·NK10 68.75 67.99 74 58
07-011 Timing Pulleys

