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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

Download Catalogue

Types

XR, XY, MR, MY

Size Designation

101 XR 30

 101 - Number of Teeth
XR - Belt Tooth Profile
30 - Belt Width (mm)

Dimensions

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
Excellent Good
*CR = Polychloroprene Rubber *H-NBR = Hydrogenated Nitrile Butadiene Rubber

Brand(s) Available

Download Catalogue

Types

R, Y, RU, YU

Size Designation

187 RU 32

 187 - Number of Teeth
RU - Belt Tooth Profile
32 - Belt Width (mm)

DimensionsUnit : 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

Download Catalogue

Types

S8M, FS9.525M

Size Designation

163 S8M 27

 163 - Number of Teeth
S8M - Belt Tooth Profile
27 - Belt Width (mm)

DimensionsUnit : 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

Download Catalogue

Types

STP, FS

Size Designation

209 STP 34

 209 - Number of Teeth
STP - Belt Tooth Profile
34 - Belt Width (mm)

DimensionsUnit : 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

Download Catalogue

Types

ZA, ZAS, ZB, ZBS

Size Designation

80 ZA 19

 80 - Number of Teeth
ZA - Belt Tooth Profile
19 - Belt Width (mm)

DimensionsUnit : 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

Download Catalogue

Types

ZA, ZLA, ZB, ZLB

Size Designation

55 ZLB 13

 55 - Number of Teeth
ZLB - Belt Tooth Profile
13 - Belt Width (mm)

DimensionsUnit : 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