HSM - Handy Stepper Motor with Manual Focus Over-Ride

$273.8 ~~$370~~ In stock

Description

This "Handy" stepper motor unit works exclusively on the Focuser Boss II electronic focuser. The design of this motor housing allows you to still be able to manually turn the focus knob on the focuser by simply turning the over-ride knob on the motor housing. This motor has a built-in temperature thermistor for temperature control through the Focuser Boss II digital system.

The HSM20 has 19,450 steps per inch and the HSM30/35 has 24,300 steps per inch.

Please select the motor needed from the drop down box

The HSM20 motor unit fits the 2.0" Feather Touch focusers, MPA Retrofits (Takahashi and TeleVue), and Micro Feather Touch^® Telescope Focusers for the SCT scopes.

The HSM30 motor unit fits the 2.0" Feather Touch Rack/Pinion focuser, 2.5" and 3.0" Feather Touch Rack/Pinion focusers, and the 2.7" Astro Physics focuser with the Feather Touch Upgrade.

The HSM35 motor unit fits the 3.5" Feather Touch Rack/Pinion focuser and the 4.0" Astro Physics focuser with the Feather Touch Upgrade.

The Tak option will fit any Takahashi 4" stock focuser.

Please click below for the installation instructions:

Installation Instructions

Installation Instructions for a Feather Touch Micro Focuser

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Julian ★★★★★ Oct 21, 2026

The housing is solid and the manual over-ride lever works smoothly, which is exactly what I needed for fine adjustments. It clicks into place on the Focuser Boss II without any fuss.

Natalie P. ★★★★★ Oct 20, 2026

I love how the manual focus over-ride lets me fine-tune without disconnecting anything, a huge plus when I’m deep into astrophotography. The motor itself is compact and silent, and it’s held up perfectly through several sessions.

Nicholas ★★★★★ Oct 18, 2026

The manual focus over-ride is a lifesaver when I need to make fine adjustments without going through the software. It clicks into place solidly and the motor feels robust. I've had no issues with slippage or missed steps so far.