has a little screw on the opposite side of the trigger, what is that for?

It's an adjustable valve,you can adjust the speed of the grinding tool by turning this screw.

Can i use it with campbell hausfeld fp209501 110 max psi air compressor? as other belt sanders rated for more powerful compressors.

Yes, it can work with the tool which you mention. But please notice that the standard working pressure of this product is 90PSI, too high or low air pressure will make a poor performance!

Can this sander fit in a 3/4" square opening? To sand off aluminum burrs from the inside of a 1" square tube.

Yes it will do that, but a bit tight as the overall head width is just under 1/2".

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Pneumatic Tool Air Belt Sander,1/4" Air Inlet,Air Belt Sander (3/8" x 13") with 12pc Belts (#40，#60，80#，120#),3/8" Air Belt Grinder For Aluminium, Iron, Steel And Etc. Metal Polishing

Pneumatic Tool Air Belt Sander,1/4" Air Inlet,Air Belt Sander (3/8" x 13") with 12pc Belts (#40，#60，80#，120#),3/8" Air Belt Grinder For Aluminium, Iron, Steel And Etc. Metal Polishing

Product ID: 214369037

Details

AC Adapter Current
4.5 A
Brand
Minimprover
Grit Number
80
Grit Type
Coarse Medium
Power Source
Air Powered

💨1/4" air inlet for efficient pneumatic power

⚙️14000 RPM high-speed power

🛠️12 versatile sanding belts included

€ 104.33

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Elevate your craft with speed, precision, and style!

COMPLETE 12 BELT KIT - From coarse to fine grit, ready for every polishing challenge
ERGONOMIC LIGHTWEIGHT - Comfort grip with non-slip handle for fatigue-free extended use
PRECISION AT 14 000 RPM - Turbocharged speed for flawless metal and wood finishing
RUST CORROSION RESISTANT - Durable stainless steel body built to last in tough environments
VERSATILE MULTI MATERIAL USE - Perfect for aluminum, steel, wood, plastics, and more—your all-in-one finishing tool

The Minimprover Pneumatic Air Belt Sander delivers a powerful 14,000 RPM performance with a durable stainless steel build and ergonomic design. Equipped with 12 sanding belts ranging from coarse to very fine grit, it’s engineered for versatile use across metals, wood, plastics, and more. Lightweight and corrosion-resistant, this tool ensures efficient, fatigue-free polishing, grinding, and deburring—making it an essential upgrade for professionals demanding precision and reliability.

Specifications

AC Adapter Current	4.5 A
ASIN	B08C6Z6LS3
Amperage Capacity	4.5 A
Best Sellers Rank	#129,365 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #48 in Power Belt Sanders
Brand	Minimprover
Brand Name	Minimprover
Customer Reviews	4.1 out of 5 stars 326 Reviews
Grit Number	80
Grit Type	Coarse, Medium, Fine, Very Fine
Item Weight	0.99 kg
Manufacturer	Minimprover
Manufacturer Part Number	H042-14
Maximum Rotational Speed	14000 rpm
Model Number	4a0eeab9-1477-4b8a-8f7d-036712c543d3
Number of Items	13
Number of Packs	1
Power Source	Air Powered
Shape	rectangular prism
UPC	779605311391
Unit Count	12 Count

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