Reversing Switch

[Anonymous-0]

I am going to install a reversing switch on a motor, a "drum " switch from Grainger. The center position is "off" , but is the motor actually off as in not drawing current , or do I need a separate on-off switch. Thanks Guys..........

 

[Bob]

Don't know what "code" requires nowadays, but the old stuff just had the "center off" drum switch.

So, "OFF" is "OFF", but there MAY be other requirements, depending upon who you have to satisfy.

 

[IH2444]

DC reverser swutch hookup -X X+


X--motor--X


+X X-
DPDT switch
+X are wired together and to + supply
-X are wired together and to - supply or ground.

 

[IH2444]

oops that came out hosed out hosed.

-x x+

x--motor--x

+x x-

 

[Charles (in GA)]

I did that on my drill press. Ran the power to the drum switch then it distributed it to the proper terminals of the motor when selected forward or reverse. Yes it does interrupt the hot wire.

You must have a motor that is designed to be reversed. Does it have wiring diagrams on it that show terminals to run it CW and CCW?

I recall that it took seven wires between the switch and the motor to make it work. This was on a Dayton/Grainger motor/drill press.

Charles

 

[Anonymous-0]

Yes , it is a reversable motor, just switch two wires. I bought an old Atlas lathe with a small motor on it . A few weeks later I picked up a 3/4 hp Atlas motor at a yard sale!! Just needed the bearings cleaned and lubed. Now I can complete the restoration to stock !!

 

[buickanddeere]

Depends if it's 120 or 240. Some drums only isolate one line which leaves 120 still energized on the 240 motor.

 

[Anonymous-0]

Charles - I am probably asking a dumb question - why do you need a reversing switch on a drill press?

Paul

 

[Dale(MO)]

Left-handed drills.

Dale(MO)

 

[Jim Krapf]

Also good for tapping holes, screw extractors, and if you've ever bound up a drill bit you'll appreciate having reverse.

 

[Anonymous-0]

Thanks Jim and Dale. Never thought about lefty drills and extractors.

 

[buickanddeere]

Four pole switch for "three way switching" works good too.