JMI Speed Dial Drill Adapter

The JMI Speed Dial Drill Adapter turns leveling your Universal Wheeley Bar from a slow hand-cranking chore into a 30-second job with any cordless drill. Chuck the adapter, drop its claws over the leveling-screw knob, and let the drill spin the screw up or down. Made in the USA by JMI (CXB Astro family).

Product Overview

A steel adapter with a standard hex shaft on one end and a claw fitting on the other. The hex shaft fits any 3/8″ or larger drill chuck; the claw end grips the knob of your Wheeley Bar leveling screw so the drill's torque does the raising and lowering. It replaces the tedious hand-cranking of three leveling screws at every setup — typically cutting leveling time by 50% or more (roughly 5–10 minutes saved per session).

Who It's For

Any JMI Universal Wheeley Bar owner who levels their rig by hand at the start of every session — especially imagers with tall tripods or anyone tired of a sore forearm after cranking screws in the dark. If you already own a cordless drill, this pays for itself in saved time within the first month of an observing season.

Key Features & Design

• Cordless-drill leveling: Standard hex shaft fits any 3/8″+ chuck — cordless or corded, any brand.
• Claw fitting: Grips the leveling-screw knob directly; no modification to your bar.
• Steel construction: Handles repeated drill torque; USA-made by JMI.
• Sized to your bar: Choose the version that matches your leveling-screw diameter.

How to Use It

Chuck the adapter into your drill, place the claws over a leveling-screw knob, and trigger the drill to raise or lower the screw. Use a low torque setting and stop when the foot contacts the ground — treat the drill like a powered fingertip so you don't over-drive the threads against the bar's stop.

Compatibility and Accessory Notes

For Universal-style Wheeley Bars only. Select by your leveling-screw diameter:

• 5/8″ version (TPWSPDIAL-5/8): Current HD Medium, HD Large, and HD Shorty bars.
• 1/2″ version (TPWSPDIAL-1/2): Standard Medium bars and older HD Medium / HD Large model years.

Not sure which you have? Pull one leveling screw and measure the thread diameter with calipers — 5/8″ is the current HD standard, 1/2″ is the older standard.

Important Limitations

• Not compatible with Triangle-Style or Sky Trekker Dobsonian bases — those use a different leveling-screw design.
• Drill and Wheeley Bar are not included.
• Order the correct diameter version — a 5/8″ adapter will not grip 1/2″ screws and vice versa.

Frequently Asked Questions

How do I know if I have 1/2″ or 5/8″ leveling screws?
Pull one leveling screw from your bar and measure the thread diameter. 5/8″ is the current HD standard; 1/2″ is the older standard used on Standard Medium and earlier HD bars.

Will any cordless drill work?
Yes — the hex shaft fits any 3/8″ or larger chuck. Use whatever drill you already own.

Can I over-torque the leveling screws?
Use a low torque setting and stop when the foot touches the ground. Over-driving against the bar's stop can strain the threads over time.

Does it fit Triangle-Style or Sky Trekker bars?
No — this is for Universal-style Wheeley Bars only.

Bottom Line

A simple, USA-made steel adapter that lets any cordless drill do your Wheeley Bar leveling in seconds instead of minutes. Just match the version to your leveling-screw size — 5/8″ for current HD bars, 1/2″ for Standard Medium and older HD models.