Powermatic Millrite MVN spindle speeds

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woodchuck57

Plastic

Joined

Jan 11, 2022

• Jan 11, 2022

• #1

Hello all. I'm totally new to milling and need some help with a used machine.
How do I change the speeds after adjusting the pulley to one of the 6 positions.
I should be able to get 8 different speeds out of the 6 spindle positions, right?

 

4GSR

Diamond

Joined

Jan 25, 2005

Location

Victoria, Texas, USA

• Jan 11, 2022

• #2

No. The pulleys/sheaves have only six steps which means 6 speeds. You can't get 8 speeds out of a 6 step sheave.

 

henrya

Titanium

Joined

Jun 25, 2008

Location

TN

• Jan 11, 2022

• #3

The speed chart was used on all models. You have to look at the motor plate for the rpm of the motor installed on your machine. Those are your 6 available speeds. To change speeds, you loosen the bolts that hold the motor in place, slide it toward the spindle, move the belt, slide motor back and tighten the bolts.

 

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woodchuck57

Plastic

Joined

Jan 11, 2022

• Jan 11, 2022

• #4

Thanks, I guess the plate confused me. What's a 4 speed reducer mentioned on the plate?

 

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woodchuck57

Plastic

Joined

Jan 11, 2022

• Jan 11, 2022

• #5

I meant to say I thought I could get all the speeds shown on the plate which is 48 I think.

 

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bikebuilder

Stainless

Joined

Feb 26, 2007

Location

Montana

• Jan 11, 2022

• #6

Looks like 1200 rpm is standard (std) for the motor speed, so look at your motor tag where it says Leeson and see what rpm it is, then you can read the chart.

There's 5 possible motor speeds.. including another 1200 rpm motor has a 4 spd reducer.

If you have the standard motor, your speed range is 3440-260 rpm.

 

K

ken moss

Stainless

Joined

Oct 18, 2002

Location

woodland wa clark

• Jan 11, 2022

• #7

I had one of these mills not long ago the belt guard is a PIA best thing to do is put a VFD on the mill so you don't have to screw with the belt guard as often Ken

 

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karl

Cast Iron

Joined

Sep 11, 2005

Location

Fayetteville, close to Pond Bank, Pa.

• Jan 12, 2022

• #8

Just FYI, there is a site on YAHOO! that caters to Burk mills that is very helpful.

 

J

Joe Gwinn

Stainless

Joined

Nov 22, 2009

Location

Boston, MA area

• Jan 12, 2022

• #9

karl said:

Just FYI, there is a site on YAHOO! that caters to Burk mills that is very helpful.

Click to expand...

Yep, but moved to groups.io: <[email protected]>

I have a MVI, which is very similar. As mentioned above, there are only six speeds available by moving the belt, for a given motor. I have a 3-phase 1200 RPM motor, driven by a VFD (in turn fed by 220 Vac single phase), so I rarely move the belt.

 

Last edited: Jan 12, 2022

henrya

Titanium

Joined

Jun 25, 2008

Location

TN

• Jan 12, 2022

• #10

Joe Gwinn said:

Yep: <[email protected]>

I have a MVI, which is very similar. As mentioned above, there are only six speeds available by moving the belt, for a given motor. I have a 3-phase 1200 RPM motor, driven by a VFD (in turn fed by 220 Vac single phase), so I rarely move the belt.

Click to expand...

I have a 3 phase motor and VFD on mine as well. Its a great set up.