View Full Version : Wiring a Drum Switch?

08-30-2006, 06:11 PM
Hi Everyone,

I've got a drum switch for my lathe, but the wiring diagram doesn't really help me much (It's all Greek to me). Can any of you help me make heads or tails out of it?

Here's the what does what part of it:

And here's the wiring part:

What leads go where and what do those coiled lines mean? Did I mention I know jack about electrical stuff?


08-30-2006, 06:44 PM
Not sure how detailed an answer you want. So I'll just hit the highlights.

The top diagram shows

In the forward postion
Pins 1 2 and 3 are shorted together and
Pins 4 5 and 6 are shorted

In the reverse postion
Pins 1 2 and 4 are shorted and
Pins 4 5 and 6 are shorted

Pins 1 and 2 are closest to the handle.

The lower diagram shows how to use this switch with diferent types of motors.

There are two common types of "single phase reversing" motors one with three wires from the motor the other with four.

The highlighted lower diagram shows the connections for a Three wire motor.

The motors three wires are not the same there are two ends and a common.

The common should be wired to mains Neutral. The ends should be wired to pins 3 and 4. (If the motor runs the wrong way reverse the connections.) The mains Hot wire to pin 2.

Clear as Mud? If not tell us the type of motor you have i.e Field wound, Single Phase Or Three Phase and if single phase a three wire or four wire. I realise this may be difficult but most motors will have a name plate (and sometime wiring diagram/guide) with info that can be decoded.

08-30-2006, 07:00 PM
Oh no! Not another one of these. :D

We need to know the wiring of your motor. There should be a diagram for it too. Which leads are used for voltage and which are for direction.

08-31-2006, 04:37 PM
Hi Guys,

Thanks for the responses. Here's the motor wiring diagram. I'm running it on 110 and the motor is Single Phase.



Here's the whole label:


Just in case it is needed, here's the switch diagram for four leads:


Take care,

08-31-2006, 11:00 PM
Using your information, wiring should be done as follows for 110vac
hookup: Drum switch terminals: #1 Blue+Orange motor leads
#2 110VAC (one side) #3 Red or Black #4 Black or Red
#5 White+Yellow motor leads #6 Other 110VAC lead
To get the motor going in the right direction, just swap Red and Black
motor leads on 3 and 4. This is not the only way to do it, just one way.
Drum switches can usually be wired 2-3 ways to solve a problem.

09-01-2006, 01:33 AM
Thanks Steve. I think I'm going to have some time on Monday to do it. I'll let you guys know how it turns out.