640-S8M-50-CXA, ContiTech, CONTI® SYNCHROFORCE CXA Timing Belt STD
Metric, Rubber, Timing belt, EAN code: 4051817044868
640-S8M-50-CXP, ContiTech, CONTI® SYNCHROFORCE CXP High-performance timing belt STD
Metric, Rubber, Timing belt, EAN code: 4051817054867
640-S8M-85, ContiTech, CONTI® SYNCHROBELT Metric Timing Belt - HTD
Metric, Rubber, Timing belt, EAN code: 4051817030182
640-S8M-85-CXA, ContiTech, CONTI® SYNCHROFORCE CXA Timing Belt STD
Metric, Rubber, Timing belt, EAN code: 4051817044875
640-S8M-85-CXP, ContiTech, CONTI® SYNCHROFORCE CXP High-performance timing belt STD
Metric, Rubber, Timing belt, EAN code: 4051817054874
6400-20M-115, Gates, POWERGRIP® HTD Metric Timing Belt
Metric, Rubber, Timing belt, EAN code: 5414465082306
6400-20M-170, Gates, POWERGRIP® HTD Metric Timing Belt
Metric, Rubber, Timing belt, EAN code: 5414465082320
6400-20M-230, Gates, POWERGRIP® HTD Metric Timing Belt
Metric, Rubber, Timing belt, EAN code: 5414465082344
6400-20M-290, Gates, POWERGRIP® HTD Metric Timing Belt
Metric, Rubber, Timing belt, EAN code: 5414465082405
6400-20M-340, Gates, POWERGRIP® HTD Metric Timing Belt
Metric, Rubber, Timing belt, EAN code: 5414465082450
645-3M-6, Gates, POWERGRIP® HTD Metric Timing Belt
Metric, Rubber, Timing belt, EAN code: 5412571316568
645-5M-15-HP, Optibelt, OMEGA HP High Performance Timing Belt HTD
Metric, Rubber, Timing belt
645-5M-15, Optibelt, OMEGA Metric Timing Belt HTD
Metric, Rubber, Timing belt
645-5M-25, Gates, POWERGRIP® HTD Metric Timing Belt
Metric, Rubber, Timing belt, EAN code: 5412571282023
645-5M-25-HP, Optibelt, OMEGA HP High Performance Timing Belt HTD
Metric, Rubber, Timing belt
645-5M-25, Optibelt, OMEGA Metric Timing Belt HTD
Metric, Rubber, Timing belt
645-5M-9, Gates, POWERGRIP® HTD Metric Timing Belt
Metric, Rubber, Timing belt, EAN code: 5412571281996
645-5M-9-HP, Optibelt, OMEGA HP High Performance Timing Belt HTD
Metric, Rubber, Timing belt
645-5M-9, Optibelt, OMEGA Metric Timing Belt HTD
Metric, Rubber, Timing belt
648-3M-15, Gates, POWERGRIP® HTD Metric Timing Belt
Metric, Rubber, Timing belt, EAN code: 5412571316612
What Are Metric Timing Belts?
Metric timing belts (also known as metric synchronous belts) feature precision-moulded teeth that mesh perfectly with corresponding pulley grooves. Unlike V-belts or flat belts, timing belts eliminate slippage, ensuring exact rotational synchronisation between shafts.
They are commonly manufactured in metric pitches such as:
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3M
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5M
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8M
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14M
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20M
These pitch designations refer to the distance (in millimetres) between belt teeth, allowing accurate specification for industrial machinery.
Need Help Selecting the Right Belt?
Choosing the correct timing belt ensures optimal performance and longevity. If you require help identifying pitch, length, or load capacity, our technical specialists are ready to assist.
Metric Timing Belts FAQs
What do 5M, 8M and 14M mean on a timing belt?
The “M” refers to metric pitch. For example:
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5M = 5mm pitch
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8M = 8mm pitch
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14M = 14mm pitch
The pitch indicates the distance between belt teeth and must match the pulley exactly.
What is the difference between metric and imperial timing belts?
Metric timing belts use millimetre pitch measurements, while imperial belts use inch-based pitch measurements. They are not interchangeable, and mixing the two can cause premature wear or drive failure.
How do I identify the correct timing belt size?
You will need:
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Tooth pitch (e.g., 8M)
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Belt length (in mm)
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Belt width (in mm)
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Tooth profile (HTD, STD, etc.)
If the belt code is visible, it usually contains this information.