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Your cart is empty.The Astro Pneumatic Tool 233 ONYX 1/8" 95° Pencil Die Grinder while lightweight for minimal fatigue also boasts high speeds adjustable up to 52,500RPM for rapid material removal. This right-angle 95° design allows access in tight spots while maintaining comfort in the hand. Specifications: Free Speed: 52,500 RPM, Collet: 1/8" (3 mm), Overall Length: 5.47" (139 mm), Net Weight: 0.485 lbs. (0.22 kgs), Hose Length: 11.8" (1300mm), Air Inlet Thread NPT: 1/4", Air Consumption: 2.7 CFM, Air Pressure: 90 PSI
Joseph
Reviewed in the United States on April 12, 2025
This pencil die grinder was a good choice for me. It is durable and able to withstand being used in a ship yard, all of the abuse in a tool bag and all the paint dust and it still functions properly. My only gripe is that this tool swivels around while using it making it difficult to hang onto at times. More use has smoothed out handling. Good tool.
TROGDOR
Reviewed in the United States on May 9, 2024
The head of this grinder is not greasable. After only about 2 hours of use there is terrible gear noise coming from the head of the grinder, and it no longer spins freely. The 1/8" collet does not grip well at all and the work tool will slide in and out while you are operating it. I have had mixed luck with Astro tools, seem to use good designs built at a strict budget and that can result in some quality issues. I would not recommend. There are good reasons why two identical looking tools that license the same design have vastly different price points, and these small grinders make it very obvious.
paul mccarl
Reviewed in Canada on May 11, 2023
Works very well and the angular head allows for easy access to what would normally be difficult sanding and grinding locations. Well made and comfortable to hold. Highly recommend this tool to be used for hard to reach spots. I use it to clean up those tough to reach, around corners and negative space locations on stone sculptures.
Jake Will
Reviewed in the United States on July 28, 2022
Use this pencil grinder alot building hot rods. A guy I work with bought one on the Snapon truck and paid 3 times as much for the same exact tool. Never been let down by Onyx tools either.
Lawrence Marsh
Reviewed in the United States on December 10, 2022
Just tried it out and seems to be well built and easy to operate.
Abbie
Reviewed in the United States on December 4, 2021
This was the only tool I could find small enough to port small displacement 2 stroke cylinders and the exhaust transfer ports without spending thousands on professional porting tools. This thing is awesome, I will say the control is in an annoying location and I have trouble with inadvertently turning up the air pressure.
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