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Imperial Timing Belts

Imperial timing belts (also known as inch pitch timing belts) feature moulded teeth spaced according to inch measurements rather than millimetres. These belts must be paired with matching imperial timing pulleys to ensure correct meshing and performance.

At ACORN®, we supply a comprehensive range of imperial timing belts in stock and available to buy online today, with fast UK and worldwide delivery.

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1181-1200 of 2878 products

1181-1200 of 2878 products

439-L-100, Optibelt, ZR Imperial Timing Belt

Imperial, Rubber, Timing belt

Brand	Optibelt
Mfr Part No.	439-L-100

$31.08

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440-H-075, Gates, PowerGrip® Imperial Timing Belt - 9277-54078

Imperial, Rubber, Timing belt, EAN code: 5412571264302

Brand	Gates
Mfr Part No.	440-H-075

$20.27

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440-H-100, Gates, PowerGrip® Imperial Timing Belt - 9277-51020

Imperial, Rubber, Timing belt, EAN code: 5412571247435

Brand	Gates
Mfr Part No.	440-H-100

$27.06

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440-H-150, Gates, PowerGrip® Imperial Timing Belt - 9277-51021

Imperial, Rubber, Timing belt, EAN code: 5412571247442

Brand	Gates
Mfr Part No.	440-H-150

$40.61

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440-H-200, Gates, PowerGrip® Imperial Timing Belt - 9277-51019

Imperial, Rubber, Timing belt, EAN code: 5412571247428

Brand	Gates
Mfr Part No.	440-H-200

$54.09

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440-H-300, Gates, PowerGrip® Imperial Timing Belt - 9277-54079

Imperial, Rubber, Timing belt, EAN code: 5412571264319

Brand	Gates
Mfr Part No.	440-H-300

$81.14

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440-MXL-012, Gates, PowerGrip® Imperial Timing Belt - 9277-40993

Imperial, Rubber, Timing belt, EAN code: 5412571234978

Brand	Gates
Mfr Part No.	440-MXL-012

$1.63

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440-MXL-012, Optibelt, ZR Imperial Timing Belt

Imperial, Rubber, Timing belt

Brand	Optibelt
Mfr Part No.	440-MXL-012

$1.93

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440-MXL-019, Gates, PowerGrip® Imperial Timing Belt - 9277-40994

Imperial, Rubber, Timing belt, EAN code: 5412571234985

Brand	Gates
Mfr Part No.	440-MXL-019

$2.55

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440-MXL-019, Optibelt, ZR Imperial Timing Belt

Imperial, Rubber, Timing belt

Brand	Optibelt
Mfr Part No.	440-MXL-019

$2.74

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440-MXL-025, Gates, PowerGrip® Imperial Timing Belt - 9277-40995

Imperial, Rubber, Timing belt, EAN code: 5412571234992

Brand	Gates
Mfr Part No.	440-MXL-025

$3.37

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440-MXL-025, Optibelt, ZR Imperial Timing Belt

Imperial, Rubber, Timing belt

Brand	Optibelt
Mfr Part No.	440-MXL-025

$3.08

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This item is not currently available from our stocks.

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448-MXL-012, Gates, PowerGrip® Imperial Timing Belt - 9277-41640

Imperial, Rubber, Timing belt, EAN code: 5412571238044

Brand	Gates
Mfr Part No.	448-MXL-012

$1.63

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448-MXL-012, Optibelt, ZR Imperial Timing Belt

Imperial, Rubber, Timing belt

Brand	Optibelt
Mfr Part No.	448-MXL-012

$1.93

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This item is not currently available from our stocks.

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448-MXL-019, Gates, PowerGrip® Imperial Timing Belt - 9277-41641

Imperial, Rubber, Timing belt, EAN code: 5412571238051

Brand	Gates
Mfr Part No.	448-MXL-019

$2.55

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448-MXL-019, Optibelt, ZR Imperial Timing Belt

Imperial, Rubber, Timing belt

Brand	Optibelt
Mfr Part No.	448-MXL-019

$2.74

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This item is not currently available from our stocks.

Despatch date information is on request.

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448-MXL-025, Gates, PowerGrip® Imperial Timing Belt - 9277-41642

Imperial, Rubber, Timing belt, EAN code: 5412571238068

Brand	Gates
Mfr Part No.	448-MXL-025

$3.37

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This item is not currently available from our stocks.

Despatch date information is on request.

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448-MXL-025, Optibelt, ZR Imperial Timing Belt

Imperial, Rubber, Timing belt

Brand	Optibelt
Mfr Part No.	448-MXL-025

$3.08

Available to back order What does this mean?

This item is not currently available from our stocks.

Despatch date information is on request.

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PHG 450-H-075, SKF, Synchronous Imperial Timing Belt - PHG 450-H-075

Imperial, Rubber, Timing belt, EAN code: 07316572593240

Brand	SKF
Mfr Part No.	PHG 450-H-075

$9.87

Despatched in 2-3 days

450-H-075, Gates, PowerGrip® Imperial Timing Belt - 9257-41045

Imperial, Rubber, Timing belt, EAN code: 5412571225129

Brand	Gates
Mfr Part No.	450-H-075

$20.95

In stock ( * cut from sleeve )

Common imperial pitches include

MXL
XL
L
H
XH
XXH

Each pitch is designed for specific torque and load capacities, making correct selection essential.

Key Benefits

Positive drive with zero slippage
Precise shaft synchronisation
High efficiency power transmission
Reduced maintenance compared to chain drives
Smooth, low-noise operation
Long service life

Imperial synchronous belts are widely used where consistent positioning and repeatability are critical.

Available Sizes & Specifications

When selecting an imperial timing belt, key factors include:

Pitch type (e.g., XL, L, H)
Belt length (in inches)
Belt width (in inches)
Tooth profile
Construction material (neoprene, polyurethane)
Tensile reinforcement type

If you have an existing belt code, it typically includes pitch and length information for easy identification.

Imperial Timing Belts FAQs

Are imperial and metric timing belts interchangeable?

No. Imperial belts use inch-based pitch measurements, while metric belts use millimetres (e.g., 5M, 8M, 14M). They are not interchangeable, even if they appear similar in size.

How do I identify my imperial timing belt size?

You will need to confirm:

Belt pitch (e.g., XL, L, H)
Belt length (in inches)
Belt width (in inches)

Most belts have a printed code that includes this information. If the marking is worn, measuring tooth pitch and belt length can help determine the correct replacement.

What causes imperial timing belts to fail?

Common causes of failure include:

Incorrect belt tension
Pulley misalignment
Overloading
Contamination from oil or debris
Mixing metric and imperial components

Routine inspection and proper installation significantly extend belt life.

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