How does belt replacement go on these. Have a 3m currently and it's impossible to depress to install the new belts?

I have had no issues with removal or replacement of the sanding belts on the Astro 3036 Belt Sander. There is a small lever on the side to lock the front roller in place while you are compressing it. This small lever lock the front roller in place so you can remove the old belt and replace it with a new one. You would than release the small lever to allow the front roller to spring back into position.

What size air tank is required/recommended to run this sander?

This is a great tool for a vast variety of jobs. very powerful, but you at not going to run this tool very long on a small pancake type compressor. a minimum requirement would be a least 3 hp with 40 gal tank for regular home owner use. 5 hp two stage would be better. if you don't have the air this tool will not perform as intended. I hope this helps

what it is power voltage 120v or 240v?

This is a air tool. Meaning you need a air compressor to power it.

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⚡️ Sand Smarter, Not Harder — The Pro’s Air Belt Sander!

CUSTOM SPEED CONTROL - Variable speed dial lets you tailor power for every project.
POWER MEETS PRECISION - Industry-leading 0.5HP motor delivers unmatched sanding performance.
EFFORTLESS BELT CHANGES - Simple tension lever for quick, hassle-free belt swaps.
BUILT FOR COMFORT SAFETY - Non-slip handle and protective guard keep you in control and secure.
READY TO WORK OUT OF THE BOX - Includes 3 premium sanding belts (#36, 40 & 60 grit) for versatile applications.

The Astro Pneumatic 3037 Air Belt Sander combines a powerful 0.5HP motor with variable speed control and an innovative belt tension lever, designed for professional-grade spot weld removal and surface finishing. Its increased pulley space supports thicker belts, while ergonomic features like a non-slip grip and safety guard ensure comfort and protection during extended use. Includes three versatile sanding belts to get you started immediately.

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Manufacturer	Astro Pneumatic Tool Company
Part Number	3037
Product Dimensions	39.37 x 8.89 x 5.08 cm; 997.9 g
Item model number	3037
Size	1/2” x 18”
Power Source	Air Powered
Item Package Quantity	1
Number of handles	1
Grit Number	40
Grit Description	Coarse
Included Components	1 Astro Pneumatic Tool Branded Product
Batteries included?	No
Batteries Required?	No
Item Weight	998 g

Astro Pneumatic 3037 Air Belt Sander (1/2" x 18") with 3pc Belts (#36, 40 & #60)

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