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Skywatcher HEQ5 Pro & Orion Sirius EQ-G
HEQ5 & Orion Sirius Pro Belt Modification Kit.
HEQ5 & Orion Sirius Belt Kit
Please see the information on this page regarding installation
of the kit to older mounts.
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.
HEQ5 Pro & Orion Sirius 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.
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.
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.