Shibumi Astro Engineering Light-Duty DEC Axis Anti-Backlash Kit for EQ8-R

Shibumi Astro Engineering Light-Duty DEC Axis Anti-Backlash Kit for EQ8-R

£577.00

(1 Review)

✓ 2 year warranty

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About this product

Model: sae_eq8r1011
Part Number: EQ8R1011

Shibumi Astro Engineering Light-Duty DEC Axis Anti-Backlash Kit for EQ8-R

Replaces the OEM RA or DEC worm block assembly, motor timing drive belt and pulley, and associated fasteners. The worm gear is flexurally mounted into mesh with the worm wheel, resulting in minimal backlash and improved transmission stiffness. An integrated meshing force guide is provided. Mesh clearance adapts to temperature fluctuation and wear and will be maintenance-free in most use-cases. Two versions of the kit are available, light-duty (LD) and heavy-duty (HD). The kit is available for any EQ8 mount model, and for either RA or DEC axis. Both LD and HD versions include precision ground worm gears made from hardened 440C stainless steel running in upgraded bearings, with spring-loading of the worm mesh with the customer’s existing worm wheel. Upgraded timing drives and where appropriate a belt tensioner are included. The OEM stepper motor and compliant motor mount are retained. The ‘Freedom-Find’ encoder read-head, if fitted, is mounted in the same way as on a standard EQ8.

LD versions are designed to provide economical and easy to fit backlash control for mounts used for light to medium payloads. A more precise zero-backlash timing drive with GT2 belts andclamp-hub timing pulleys is included for LD kits for the RA axis on EQ8’s, and for both axes on EQ8-R’s.

HD versions are optimised for greater transmission stiffness and lower backlash for use with high payloads. These cost more, and an automated gear burnishing operation is mandatory after installation to match the new worm gear to the existing worm wheel. They use a redesigned larger, stiffer worm gear, heavy-duty radial/axial worm bearings, larger timing drive pulleys housed in new roomier plastic covers. A relocated worm index switch is used in the RA axis kits. The DEC axis kits substitute a folded timing drive configuration for the DEC axis kit (similar to the EQ8-R) in place of the direct-driven DEC worm used in OEM EQ8 mounts.

HD versions exclusively offer the choice of either a 1:1 timing drive ratio (as per the OEM mount) or 1.5:1 ratio (which reduces maximum slewing speed but boosts drive torque and tracking smoothness.)

Specifications

SKU	EQ8R1000
Name	DEC Axis Stiffness Kit for EQ8R
Quantity	1
Weight	2.5kg
Packed Dimensions	Carton 28.5x14.5x9.5 cms
Contents	Pair of P5 grade precision DEC axis tapered roller bearings, DEC Axis Shaft, bearing lubricant, installation instructions.
Mount Compatibility	Skywatcher EQ8Ror Orion USA HDX110 German equatorial mounts
Installation Difficulty:	Moderate
Often Bought With	SS Fastener kit, Clutch Upgrade kit, LD DEC Anti-Backlash kit, Environmental Sealing kit, Pin Wrench for axis shaft ringnut removal.
Highlights	This modification is a pre-requisite for users interested in controlling Declination axis backlash while simultaneously raising imaging payload. For light duty use, it will usually be possible to obtain acceptable control of DEC backlash using SAE’s LD DEC ABL kit alone.
Fitting Service	Please Contact Us
Warranty	2 Years

Customer reviews

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LD Dec axis anti backlash kit

27 September 2024 | Nigella

Only just received this so don't know about performance. Looks the business compared to the original static worm block. Only criticism is that I'd thought it would come with fitting instructions, nothing supplied as to how to fit it. Some paperwork would have been great at this price point.

Response:

This should come supplied with a USB stick containing the installation manual and lots of other useful resources. We understand this was missing from your kit so we will arrange to get the a USB stick with the documentation sent out to you asap. Our apologies for this being missing.

I owe Nigella a big apology - we have since clarified that this particular kit isn't supplied with a USB stick or specific instructions. Shibumi will be producing a guide for this item and we will ensure this is linked to on the product page in future. I'm very sorry Nigella for the mishap here.