Is there a trigger mechanism, or is it just always on when connected to air?

There is a twisting mechanism that controls airflow. This allows for variable speed and shuts off the air completely

I am looking to mount in a lathe quick change tool holder (any one know what the body OD is the blue part)

0.6250",15.87mm according to the mitututoyos, I would make a dual ring assymbly mounted to a tool post, bore the rings six .625 split one ended, drill and thread it to screw the rings closed further to grip the tool. But as always there's more than one way to go about things, I'm sure your could find a 1/2 inch boring bar holder and drill it ou55oversize and put the screws to it

It is leaking air from under the rearend holder when turned on. It does not spin. Just shoots air out of the back. Hose/hose fitting are not leaking*

I just returned one with the exac problem. Ive been working on and off for 50 years with small type air grinders but this jewel turned out to be a paste. I was Really disappointed that it didn’t represent its maker very well. One of these shouldn’t be seized just out of box, oiled and connected with correct air supply.

is this any good for use on resin counter tops?

I would say it depends on what you're doing. If you're cutting the counter tops then no but if you're etching a design I'd say sure why not.

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Astro Pneumatic Tool 218 1/8" Pencil Type Die Grinder - 56,000RPM,Black,gold,blue, 42377

Product ID: 305567493

Details

Brand
AP
Colour
Black blue
Power source
Recommended uses for product
Cleaning
Voltage
120

🪶Lightweight 363g for effortless handling

⚙️56,000 RPM ultra-high speed

🎛️Variable speed twist throttle control

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Description

⚡️ Grind fast, finish flawless — the pro’s secret weapon!

FEATHERLIGHT DESIGN - Weighing just 363 grams, it fits perfectly in tight spots without fatigue—work smarter, not harder.
CUSTOM SPEED CONTROL - Twist throttle lets you dial in the exact speed you need for every intricate task.
VERSATILE COMPATIBILITY - Works seamlessly with any 1/8" accessories, expanding your toolkit’s potential instantly.
COOL EFFICIENT OPERATION - Pneumatic power means no overheating—keep grinding for hours without a pause.
PRECISION AT LIGHTNING SPEED - Turbocharge your workflow with a blazing 56,000 RPM for flawless finishing and porting.

The Astro Pneumatic 218 Pencil Die Grinder delivers an industry-leading 56,000 RPM in a lightweight 363g aluminum body. Designed for precision finishing and porting in tight spaces, it features a variable speed twist throttle for ultimate control. Compatible with all 1/8" accessories and powered pneumatically to prevent overheating, it’s the go-to tool for professionals demanding speed, accuracy, and durability.

Specifications

ASIN	B000RH36WU
ASIN	B000RH36WU
Best Sellers Rank	#103,212 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #257 in Power Grinders
Brand Name	AP
Color	Black,blue,gold
Customer Reviews	4.6 4.6 out of 5 stars (1,053)
Customer reviews	4.6 4.6 out of 5 stars (1,053)
Date First Available	1 January 2024
Global Trade Identification Number	00745227001019
Included Components	attachments
Is Discontinued By Manufacturer	No
Item Dimensions	13.2 x 36.8 x 50 centimeters
Item Type Name	Astro Pneumatic Tool 218 1/8" Pencil Type Die Grinder - 56, 000RPM, Black, gold, blue, 42377
Item Weight	363 g
Item model number	218
Manufacturer	Astro Pneumatic
Manufacturer	Astro Pneumatic
Manufacturer Part Number	218
Maximum Rotational Speed	56000 RPM
Minimum Speed	56000 RPM
Model Number	218
Number of Items	1
Number of Packs	1
Other Special Features of the Product	Lightweight
Power Source	pneumatic-powered
Product Dimensions	13.21 x 36.83 x 50.04 cm; 362.87 g
Recommended Uses For Product	Cleaning, Grinding, Polishing
Style Name	Precision Portable High-Speed Finishing Tool
UPC	745227001019
Unit Count	1 Count
Voltage	120

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B/.167

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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