| Automotive Timing Belt |
| |
Timing belt has gained the popularity for overhead camshaft (OHC) drive for its quiet operation and the possible reduction in the weight of the car resulting in a fuel saving.
These timing belts are specially engineered and constructed to last longer in the environment of high engine heat. |
| |
Typical Layout of OHC Timing Drive |
 |
| |
Type / Characteristics / Performance |
 |
Grade |
Characteristics |
Performance of Belt |
| Power Transmission Capacity |
Water Resistance |
Tooth Crack Resistance |
Bending Fatigue Resistance |
Heat Resistance |
| Standard |
This belt uses chloroprene rubber for teeth and backs of the belt |
 |
 |
|
|
90°C |
| Premium |
This belt has excellent heat resistance. This is due to the use of H-NBR rubber for teeth and belt backs |
|
|
|
|
120°C |
|
|
Excellent |
|
Good |
|
| |
| Belt Type & Tooth Profile |
 |
High Functional Drive
Rounded tooth profile for less noise at high speed operation.
Characteristics:
- Rounded tooth profile feature better stress dispersion and less noise drive
- Smooth engagement of belt with pulley allows high speed operation
|
|
| |
| Brand(s) Available: |
 |
|
| |
 |
|
|
| Types : XR, XY, MR, MY |
| Size Designation |
101 XR 30 |
101 - Number of Teeth |
| XR - Belt Tooth Profile |
| 30 - Belt Width (mm) |
|
| Dimensions |
Unit : mm |
Profile |
P |
hs |
ht |
t |
Rr |
Ra |
 |
| XR |
9.525 |
5.69 |
3.54 |
2.15 |
0.76 |
2.52 |
| XY |
8.000 |
5.21 |
3.06 |
2.15 |
0.63 |
2.20 |
| MR |
9.525 |
5.69 |
3.54 |
2.15 |
0.76 |
2.52 |
| MY |
8.000 |
5.21 |
3.06 |
2.15 |
0.63 |
2.20 |
|
| MITSUBOSHI “X” series Timing Belts are available in standard (CR*) and premium (H-NBR*) grade |
"X" Series Belt Performance |
Grade / Characteristics |
Power Transmission Capacity |
Water Resistance |
Tooth Crack Resistance |
Bending Fatigue Resistance |
Heat Resistance |
| Standard: CR |
 |
 |
|
|
90°C |
| Premium: H-NBR |
|
|
|
|
120°C |
|
| Good |
|
Excellent |
|
*CR = Polychloroprene Rubber
*H-NBR = Hydrogenated Nitrile Butadiene Rubber |
|
|
|
| |
| Brand(s) Available: |
 |
|
| |
|
|
|
| Types : R, Y, RU, YU |
| Size Designation |
187 RU 32 |
187 - Number of Teeth |
| RU - Belt Tooth Profile |
| 32 - Belt Width (mm) |
|
| Dimensions |
Unit : mm |
Profile |
P |
hs |
ht |
t |
 |
| R |
9.525 |
5.69 |
3.54 |
2.15 |
| Y |
8.000 |
5.21 |
3.06 |
2.15 |
| RU |
9.525 |
5.40 |
3.44 |
1.96 |
| YU |
8.000 |
5.20 |
3.02 |
2.18 |
|
|
|
| |
|
Super Torque Synchronous
Unique rounded tooth design permits smooth engagement with pulley and reduces noise.
Characteristics:
- Special tension member provides stretch and resistance to elongation
- Smooth engagement of belt with pulley allows high speed operation
|
|
| |
| Brand(s) Available: |
|
|
| |
|
|
|
| Types : S8M, FS9.525M |
| Size Designation |
163 S8M 27 |
163 - Number of Teeth |
| S8M - Belt Tooth Profile |
| 27 - Belt Width (mm) |
|
| Dimensions |
Unit : mm |
Profile |
P |
hs |
ht |
t |
S |
Rr |
Ra |
R |
a
(PLD) |
| S8M |
8.000 |
5.30 |
3.05 |
2.25+0.25 |
5.20 |
0.80 |
0.80 |
5.20 |
0.686 |
| FS |
9.525 |
5.35 |
3.05 |
2.30+0.25 |
5.20 |
0.80 |
0.80 |
5.20 |
0.686 |
|
|
|
|
| |
| Brand(s) Available: |
|
|
| |
|
|
|
| Types : STP, FS |
| Size Designation |
209 STP 34 |
209 - Number of Teeth |
| STP - Belt Tooth Profile |
| 34 - Belt Width (mm) |
|
| Dimensions |
Unit : mm |
Profile |
P |
hs |
ht |
t |
 |
| STP |
8.000 |
5.30 |
3.05 |
2.25 |
| FS |
9.525 |
5.35 |
3.05 |
2.30 |
|
|
|
| |
 |
Trapezoidal Synchronous
OHC drive timing belt that overcomes severe operating condition in engine compartment.
Characteristics:
- High tensile strength with minimum belt stretch
- Minimized weight and noise compared to chain drives
- Provides intense precision
|
|
| |
| Brand(s) Available: |
|
|
| |
|
|
|
| Types : ZA, ZAS, ZB, ZBS |
| Size Designation |
80 ZA 19 |
80 - Number of Teeth |
| ZA - Belt Tooth Profile |
| 19 - Belt Width (mm) |
|
| Dimensions |
Unit : mm |
Profile |
P |
2B |
hs |
ht |
t |
S |
Rr |
Ra |
Rs |
a
(PLD) |
| ZA |
9.525 |
40 |
4.21 |
1.91 |
2.30+0.25 |
4.65 |
0.51 |
0.51 |
- |
0.686 |
| ZAS |
9.525 |
40 |
4.62 |
2.32 |
2.30+0.25 |
4.65 |
0.51 |
0.51 |
3.00 |
0.686 |
| ZB |
9.525 |
40 |
4.59 |
2.21 |
2.30+0.25 |
6.12 |
1.02 |
0.90 |
- |
0.686 |
| ZBS |
9.525 |
40 |
5.06 |
2.76 |
2.30+0.25 |
6.12 |
1.02 |
0.90 |
3.55 |
0.686 |
|
|
|
|
| |
| Brand(s) Available: |
|
|
| |
|
|
|
| Types : ZA, ZLA, ZB, ZLB |
| Size Designation |
55 ZLB 13 |
55 - Number of Teeth |
| ZLB - Belt Tooth Profile |
| 13 - Belt Width (mm) |
|
| Dimensions |
Unit : mm |
Profile |
P |
hs |
ht |
t |
| ZA |
9.525 |
4.21 |
1.91 |
2.30 |
| ZLA |
9.525 |
4.62 |
2.32 |
2.30 |
| ZB |
9.525 |
4.59 |
2.21 |
2.30 |
| ZLB |
9.525 |
5.06 |
2.76 |
2.30 |
|
|
|
|
| |
