JET JAT-402, 1/4-Inch Extended Pneumatic Die Grinder (505402)

JET JAT-402, 1/4-Inch Extended Pneumatic Die Grinder (505402)

$ 103.90

Score By Feature

Based on 33 ratings

Easy to install

9.70

Easy to use

9.48

Suction power

9.72

Durability

9.18

Value for money

9.51

OveReview Final Score

How Our Score Is Calculated

Product Description

IMPROVED SAFETY Advanced lockoff switch that ensures safety and ease of use.

CONTROLLING WITH SUCCESS This sealed ball bearing design keeps contaminants and lubricants out of the bearing.

A VARIABLE-SPEED THRUNCHY Ramps up to a maximum of

CONSTRUCTION MADE FROM LIGHTWEIGHT ALLOY REDUCES FATIGUE.

Precision speed control provided by an air regulator built into the motor.

Questions & Answers

Can you tell me how many horsepower it has?

Power 5 horsepower

How do I find out what the rpms are on this one?

As long as I keep my compressor regulated at 100 psi, the tool appears to work really well and has no bogging issues. My knowledge of the rpm's is very limited, but I think it's close to what it's rated at.

When it comes to barrel diameter, what is it?

The diameter of the barrel is 1 inch An 18/32" diameter handle part is 1" in diameter Half an inch.

Can you tell me how long the shaft of the grinder is? Does it not fall under the OA?

Approximately 1/2 inch

Selected User Reviews For JET JAT-402, 1/4-Inch Extended Pneumatic Die Grinder (505402)

This die grinder has an amazing extended reach and is very powerful

5/5

As part of my rebuild, I am removing all of the unused components from the Dana 44 front axle. In addition, I removed the inner Cs for the reason that I'm going to set the pinion angle and the caster angle later on. Specifically, I want to scrub the inside of the axle tubes to remove the rust. The only tool I need for this is an extended die grinder. The Jet unit I got is well-supposed to be extremely powerful, which is why I chose it. In this case, I put a wire brush wheel into the collet and it removed rush very quickly. It includes a manual as well as collet wrenches. The only thing you'll need is your air hose nibble and some air tool oil to start out. One of the downsides to this tool is its loud noise, which is much louder than things I have used in the past.

Carmen Fischer

| Jul 04, 2021

This is a great tool

5/5

I found a used one here and decided to give it a shot. It has proven to be a handy little tool to use for prepping pin bores and other surface preparation.

Rayna Wallace

| Jul 24, 2020

The description is exactly as written

5/5

I really like how it works. Having the ability to handle torque is a plus.

Waverly Taylor

| Nov 06, 2020

I give it five stars

5/5

Very well done.

Christian Montoya

| Sep 01, 2020

That's what you'd expect from JET

5/5

A very high quality product.

Elsa Daniels

| Apr 25, 2021

A grinder with an extended blade is required

5/5

For long bores or anything else that needs power to grind, this is the best grinder! There are way more balls in this one than a basic grinder, so it's the same price! It looks to me like the shaft's extended energy is causing it. You need a grinder if you're polishing or if you're doing anything that requires balls.