SmartComponents ZWO EAF Mount for RedCat 51 and SpaceCat

Product Highlights

• ✔ Designed specifically for ZWO EAF motorized focusers

• ✔ Compatible with RedCat 51 & SpaceCat helical focusers (Mk I & Mk II)

• ✔ Not compatible with RedCat 51 v3 / L-RC51RDIII Rack & Pinion focuser

• ✔ Includes mounting points for a mini guide scope and ASIAIR Pro/Plus

• ✔ Strong, temperature-stable PETG construction (no warping like PLA)

• ✔ Easy installation and removal

• ✔ Includes all required hardware (belt, tensioner, pulley)

Includes two pulley sizes — compatible with BOTH the original ZWO EAF (5 mm shaft) and the newer EAFN / EAF Pro (4 mm shaft)

Upgrade your RedCat 51 or SpaceCat with smooth, reliable, and fully automated focusing using this SmartComponents ZWO EAF Focuser Mount. Designed for telescopes equipped with the original helical focuser (versions 1 and 2), this mount allows seamless integration of the ZWO EAF for precise autofocus performance.

Dual Pulley System — Supports All EAF Models
Every kit includes two pulleys:

• A 5 mm bore pulley for the original ZWO EAF

• A 4 mm bore pulley for the newer ZWO EAFN / EAF Pro

This ensures full compatibility regardless of which ZWO EAF version you own—no need to worry about selecting the correct one.

This custom-engineered mount attaches securely to the helical focuser while maintaining a clean, compact profile. It also includes dedicated mounting points for two popular accessories:

• a mini guide scope, and

• the ASIAIR Pro or ASIAIR Plus

Perfect for astrophotographers looking for a lightweight, efficient, and fully integrated imaging setup.

Crafted from durable PETG, the mount remains stable across a wide temperature range, resists warping, and provides better long-term rigidity than common PLA alternatives.

Compatibility Note:
Compatible with RedCat 51 / SpaceCat Mk I and Mk II helical focusers only.
Not compatible with the RedCat 51 v3 (L-RC51RDIII Rack & Pinion focuser

• EAF focuser mount (PETG)

• GT2 timing belt

• Belt tensioner

• GT2 pulley