Mike Phillips
Active member
- Dec 5, 2022
- 51,004
- 6
Spindle size on the Griot's 3" Mini Polisher - Also... don't do this...
I think it was before I left for Mobile Tech Expo this year that someone asked about the thread size for the new Griot's HD 3" Backing Plate?
The question was,
Would the new Griot's 3" HD Backing Plate fit on the Griot's Garage 3" Mini Polisher?
I answered the question in the thread and said,
"yes"
I also took some pictures to show that it would fit but at the time I didn't have the new 3" HD Backing Plate so I used a normal Lake Country 5" Backing Plate to tell the story. The story is that most of the simple DA polishers or what I call entry level dual action polishers all use the same thread size free spinning spindle which is a 5/16" thread pitch.
While processing pictures for this weekend's boat class I found the Griot's pictures on the camera memory card so instead of moving them off to some obscure folder where they will get covered in cyber dust, I simply processed them.
Here they are, they tell the story but be WARNED - Don't use a 5" backing plate on a Griot's 3" polisher. It's too big in case you can't figure it out. I simply used the 5" backing plate to show that it and most other backing plates all use the same thread size stud and by way of comparison the bigger picture is that YES the new Griot's 3" HD Backing Plate WILL fit on the Griot's 3" polisher but you still DON'T want to use it on this small polisher as it's TOO BIG in mass and my guess is you'll wear out the bearing that supports the free spinning spindle.
Now using the knowledge of knowing how to upload pictures to a gallery and then insert them on the Interweb...

I think it was before I left for Mobile Tech Expo this year that someone asked about the thread size for the new Griot's HD 3" Backing Plate?
The question was,
Would the new Griot's 3" HD Backing Plate fit on the Griot's Garage 3" Mini Polisher?
I answered the question in the thread and said,
"yes"
I also took some pictures to show that it would fit but at the time I didn't have the new 3" HD Backing Plate so I used a normal Lake Country 5" Backing Plate to tell the story. The story is that most of the simple DA polishers or what I call entry level dual action polishers all use the same thread size free spinning spindle which is a 5/16" thread pitch.
While processing pictures for this weekend's boat class I found the Griot's pictures on the camera memory card so instead of moving them off to some obscure folder where they will get covered in cyber dust, I simply processed them.
Here they are, they tell the story but be WARNED - Don't use a 5" backing plate on a Griot's 3" polisher. It's too big in case you can't figure it out. I simply used the 5" backing plate to show that it and most other backing plates all use the same thread size stud and by way of comparison the bigger picture is that YES the new Griot's 3" HD Backing Plate WILL fit on the Griot's 3" polisher but you still DON'T want to use it on this small polisher as it's TOO BIG in mass and my guess is you'll wear out the bearing that supports the free spinning spindle.
Now using the knowledge of knowing how to upload pictures to a gallery and then insert them on the Interweb...
