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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Description

⚡ Elevate your craft with power and precision—don’t get left behind!

CUSTOM SPEED CONTROL - Variable speed dial lets you tailor the tool’s pace to every project’s unique demands.
POWER MEETS PRECISION - Industry-leading 0.5HP motor delivers unmatched sanding performance for flawless finishes.
COMFORT SAFETY FIRST - Non-slip handle grip and protective guard ensure operator comfort and safety during extended use.
EFFORTLESS BELT CHANGES - Simple tension lever means no downtime—switch belts in seconds and keep your workflow smooth.
THICKER BELTS LONGER LIFE - Expanded pulley space supports new, thicker sanding belts for enhanced durability and efficiency.

The Astro Pneumatic 3037 Air Belt Sander is a lightweight, air-powered tool featuring a robust 0.5HP motor, variable speed control, and an innovative design that accommodates thicker 1/2" x 18" sanding belts. Engineered for spot weld removal and versatile sanding tasks, it includes a simple belt tension lever, non-slip grip, and protective guard, making it a reliable choice for professionals seeking efficiency and comfort.

Specifications

Brand	Astro Pneumatic Tool
Product Dimensions	15"L x 4"W x 3"H
Grit Type	Medium
Power Source	Air Powered
Grit Number	40
Item Weight	2.2 Pounds
UPC	799621207201 782386214607 735090926861 013222097741 757282027040 745227019441 757073777055 784497038165 787721808053
Global Trade Identification Number	00745227019441
Manufacturer	Astro Pneumatic Tool Company
Part Number	3037
Item Weight	2.2 pounds
Item model number	3037
Is Discontinued By Manufacturer	No
Size	1/2” x 18”
Style	Sander
Material	Aluminum
Thickness	2.2 Inches
Item Package Quantity	1
Number of Handles	1
Included Components	1 Astro Pneumatic Tool Branded Product
Batteries Included?	No
Batteries Required?	No
Warranty Description	1 yr warranty on material and workmanship

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