Rowan Astronomy Sky-Watcher HEQ5 Pro & Orion Sirius EQ-G Belt Mod Kit

Rowan Astronomy Sky-Watcher HEQ5 Pro & Orion Sirius EQ-G Belt Mod Kit

  (15 Reviews)
✓ 2 year warranty


7x in stock shipped 1-2 working days

About this product

Model:  rowan_heq5_belt_mod_kit
Part Number:  10000012a

This kit replaces the HEQ5 Pro's spur gear drive train with timing belts. 

Reduces spur gear errors, which reduces tracking errors.

Slewing is much quieter - the 'grinding' noise that regular spur gears produce is significantly reduced. 

The pulley ratio is the same as the factory gears so Sky Watcher SynScan hand controller functions are unaffected. All gain and no loss :-) 

HEQ5 Belt 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. 

Rowan HEQ5 Belt Kit Fitting Instructions

An optional extractor tool is available to easily remove the pinion gear from the motor. 

Please note: Some older HEQ5 Pro mounts (around 6+ years) require an additional step when installing this upgrade kit. 

Customer reviews

Average Rating (15 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Great customer service
Sunday, 28 November 2021  | 

I didn't expect my first shopping experience with FLO could be so nice. Chris has been really quick in every response to my questions. I felt supported before and after the purchase. FLO has the friendliest staff!

The belt mod kit has been easy to install. I didn't unplug the motors from the circuit board as instructed, and didn't encounter any troubles because of it. I used the pinion extractor, which was straight and easy to use. I wanted to compare using it against without it, but I wasn't ready to take any risk of damaging my gears.

Rating (max 5):  
Rowan belt mod
Saturday, 5 June 2021  | 

Speedy delivery from FLO, fitted the belt mod to my heq5 pro mount, sounds like a totally different mount, havenít tried it outside yet due to the weather, also purchased the pinion extractor tool which is a must, a great upgrade well worth the money.

Rating (max 5):  
Straight forward install
Monday, 24 May 2021  | 

Straight forward to install (get the additional pinion extractor), instructions a easy to follow. My mount is a lot quieter after fitting , not had chance to see if my guiding has improved due to bad weather

Rating (max 5):  
Rowan belt kit
Monday, 17 May 2021  | 

Great kit,Very easy to fit havenít had a chance to use it outside but I did try it out inside, there seems to be no backlash whatsoever canít wait to get outside for some clear skies,Great service from FLO as always, thanks guys keep up the good work

Rating (max 5):  
Great product and service
Monday, 3 May 2021  | 

The package arrived within 5 working days in SW France, no charges from La Poste (yet?). The upgrade is well made and the instructions very good...especially when you have watched several videos on the subject! Fitting would have been very easy but for some poor quality control on the mount's motors (holes not round) but easily sorted. The distances suggested were also out due to said Skywatcher inconsistencies but again I just made sure everything was level and running smoothly. Oh the lack of grinding noises and backlash. My guiding has also improved considerably. Value..seems expensive but I would prefer to upgrade this mount than spend 10x to 20x (or more) on a new mount. Add this upgrade to the ADM dual saddle (also from FLO), improved azimuth bolts and mounting on a pier and I should be OK. One other the pinion extractor (4mm in my case)

Rating (max 5):  
Order and receiving items
Tuesday, 23 March 2021  | 

Once again, super quick delivery and quality products. The belt mod especially is a quality product that has really improved the mount accuracy. Very happy

Rating (max 5):  
Fantastic service from FLO
Monday, 15 March 2021  | 

I have not long fitted the belt mod to my HEQ5 Pro and tested it on an imaging session over the weekend.

Prior to fitting the belt mod I was achieving circa 1.3" RMS error however the other night I was averaging around 0.8" - baring in mind that there was a 'breeze' in the air I thought that was a huge improvement.

Thanks to FLO for the well packaged, quickly sent item. A fantastic service as always!

Rating (max 5):  
Sky-Watcher heq5 pro belt mod
Thursday, 8 October 2020  | 

Good quality, easily fitted with included instructions. Flo delivered promptly. Just need the clouds to go away so I can see if it improved the sky watcher mount. I have high hopes as when I stripped the original gears away from the Mount I could visually see the backlash in the gears as I rocked them back and forward.

Rating (max 5):  
Easy and effective
Tuesday, 25 August 2020  | 

The the pinion extractor is an essential, but if you follow the instructions and are methodical then itís pretty straight forward. One of the instructions is to set a pulley 5.5mm away from the body so you may struggle without a digital vernier calliper but itís easy enough if you do have one.

Rating (max 5):  
Awesome improvement for Sirius EQ-G
Wednesday, 2 October 2019  | 

The belt kit from Rowan astronomy came well packaged and labeled!

The instructions were clear and thorough with detailed pictures to clarify the text.

The mount is much much quieter. The sound with the old gear train (before the timing belt upgrade) was annoying.

The 4mm gear extractor made easy work of removing the small drive gear from each motor.

I have only recently performed this upgrade and have not had much time at this scope since. But everything I
have read on the Rowan upgrade has been positive. I expect the same.

By the way, Martin at FLO was quick to answer some questions and they also had the best price.

Read all 15 customer reviews...


Please fill in the form below to ask a question.


Q1. Do you have advice for tensioning the belts?

As a guide, when fitted you should just be able to twist the belt through 90 degrees. If you can twist it more or less then the tension needs to be adjusted.