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Skywatcher HEQ5 Pro & Orion Sirius EQ-G

HEQ5 & Orion Sirius Pro Belt Modification Kit.
HEQ5 Belt Kit.

HEQ5 & Orion Sirius Belt Kit

Please see the information on this page regarding installation
of the kit to older mounts.

Pinion Gear Extractor.
Pinion Gear Extractor


Choose the extractor size for the pinion through hole diameter.
Please measure the diameter shown in the photo below.
The measurement will be 3mm or 4mm.
4mm type shown.
Pinion Diameter

HEQ5 Pro & Orion Sirius Belt Kit.
HEQ5 Belt Kit.

This kit replaces the factory spur gear drive train with timing belts.
The pulley modification reduces the spur gear errors that are typical and
therefore reduces tracking errors. The belts also make slewing much quiter
eliminating the 'grinding' noise that the standard spur gears produce.

The pulley ratio is the same as the factory gears. This means the
Synscan hand controller is unaffected by this upgrade. All Synscan
functions will operate as before.

HEQ5 Belt Kit.
The kit comprises of -
2 x 47 tooth pulleys. 2 x 9 tooth pulleys.
2 x timing belts.
2 x intermediate rollers. 2 x 5mm mounting shafts.
1x 8mm white acrylic cover spacer + 6 stainless fixings.
Fitting instructions.

Larger photo of kit   Click

An optional extractor tool is available to allow
the pinion gear to be removed easily from the motor.

Please check out   these internet sites showing customer reports and videos of the HEQ5 belt kit.

Although we make every effort to ensure links to external websites are accurate, up to date and relevant, Rowan Astronomy (or Rowan Engineering Ltd.) cannot take any responsibility for pages from external sources.
If you come across any external links that don't work, we would be grateful if you could report them to us.

HEQ5 Belt

HEQ5 Spare Belt.

In normal use the belts supplied will the kit will provide many years of service.
We supply spare belts in the event of incorrect fitting or incorrect mount disassembly which may cause damage to the belts.
Under all normal circumstances spare belts are not usually needed.