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

Q: 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

Q: 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

Q: 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.

Q: 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.

Product ID: 6194340

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Details

Brand
Astro
Material
Aluminum
Product Dimensions
5.2"L x 14.5"W
Style
1-PACK
Power Source

⚡56,000 RPM max speed

🎛️Variable speed twist throttle

🛠️Lightweight aluminum build

Description

⚡ Grind smarter, not harder — speed and precision in your palm!

FEATHERWEIGHT POWERHOUSE - Engineered with durable aluminum, this die grinder weighs just 12.8 oz for effortless handling in tight spots.
VERSATILE PRO GRADE TOOL - Perfect for cleaning dies, rotors, brake pads, and more—your all-in-one finishing solution.
CUSTOM CONTROL EVERY TIME - Twist throttle lets you dial in the perfect speed, giving you unmatched precision on every project.
PRECISION AT LIGHTNING SPEED - Turbocharge your workflow with an ultra-fast 56,000 RPM motor for flawless finishing.
BUILT TO LAST WITH CONFIDENCE - Backed by a 1-year warranty, ensuring reliability and peace of mind on every job.

The Astro Pneumatic 218 Pencil Die Grinder delivers a blistering 56,000 RPM with a lightweight aluminum body and variable speed control, making it ideal for detailed finishing and cleaning tasks in tight spaces. Designed for professionals seeking precision and durability, it comes with attachments and a 1-year warranty for dependable performance.

Specifications

Brand	Astro Pneumatic
Material	Aluminum
Product Dimensions	5.2"L x 14.5"W x 19.7"H
Style	1-PACK
Power Source	pneumatic-powered
Color	Black,blue,gold
Item Weight	0.8 Pounds
Voltage	120
Maximum Rotational Speed	56000 RPM
Global Trade Identification Number	00745227001019
Manufacturer	Astro Pneumatic
UPC	745227001019
Part Number	APT-218
Item Weight	12.8 ounces
Item model number	218
Is Discontinued By Manufacturer	No
Size	42377
Thickness	19.7 Inches
Item Package Quantity	1
Special Features	lightweight
Included Components	attachments
Batteries Included?	No
Batteries Required?	No
Warranty Description	1 yr warranty on material and workmanship