Using a starter motor for a winch

Submitted: Friday, Apr 21, 2006 at 15:49
ThreadID: 33128 Views:14175 Replies:8 FollowUps:5
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I have been told that a 6 or 12 volt starter motor can be used for a winch. I have a Ramsey 9000lb winch but no motor. Can anyone hlep me with this?
Thanks
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Reply By: Member - Oldplodder (QLD) - Friday, Apr 21, 2006 at 16:46

Friday, Apr 21, 2006 at 16:46
Yes, I have a few friends that have done this for a boat trailer winch.

Boats being trailer sailors etc, usually about 1 to 2 tonnes.

Need to get the gear ration down though, often using two pulleys and a V belt like a fanbelt. Look for a 5:1 or 10:1 or larger ratio before the cable spool.

But I have my doubts about using this for a winch for the front of a 4wd.

They are pulling a boat out of the water using rollers at a 5 or 10 degree angle.

Add some mud, and a steeper angle and I am not sure if the starter motor would be strong enough, or geared low enough. Trying to find a compact gearing system, it may be cheaper to buy a dedicated 4wd winch :-).

But I bet some one on this forum has done it!
AnswerID: 168337

Reply By: Truckster (Vic) - Friday, Apr 21, 2006 at 16:59

Friday, Apr 21, 2006 at 16:59
Ummmmmmmm.... not a chance.

buy a proper winch motor
AnswerID: 168342

Reply By: Bonz (Vic) - Friday, Apr 21, 2006 at 17:23

Friday, Apr 21, 2006 at 17:23
They pull hard but not for long, theyre built for short bursts of power, not prolonged like in a winching application
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Follow Up By: Jimbo - Friday, Apr 21, 2006 at 19:19

Friday, Apr 21, 2006 at 19:19
Your adolescent memories Geoff?
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Follow Up By: Bonz (Vic) - Friday, Apr 21, 2006 at 23:15

Friday, Apr 21, 2006 at 23:15
I used to drive an XW Falcon, they pulled hard all day long
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Follow Up By: Rock Crawler - Sunday, Apr 23, 2006 at 09:29

Sunday, Apr 23, 2006 at 09:29
""""I used to drive an XW Falcon"""""

in that case , dont come past my house lol . Only if you have tissues lol
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Reply By: F4Phantom - Friday, Apr 21, 2006 at 18:11

Friday, Apr 21, 2006 at 18:11
there are heaps of little motors available with switches and all the rest to go with them. I used to work at a place which sold around 20 types of small electric motors from weak to strong. most will go all day. anyway at the risk of promoting a business I used to work at I wont name them but if you want to know just give me your email.
AnswerID: 168357

Reply By: Eric Experience. - Friday, Apr 21, 2006 at 22:59

Friday, Apr 21, 2006 at 22:59
Ultimateshrub.
Yes you can, but you have to bring out the connection to the brushes and the field on seperate terminals so you can reverse it and you have to machine a spline for a gear on the shaft, a lot of work when you can pick up a winch for a few hundred $.
Eric.
AnswerID: 168412

Reply By: Bilbo - Friday, Apr 21, 2006 at 23:07

Friday, Apr 21, 2006 at 23:07
I agree with Truckster. Starter motors are not designed for prolonged use as is a winch motor.

You may get away with pulling a relatively light load such as a small boat back onto a trailer, but for winching a 2 to 3.5 tonnes 4WD out of a bog, forget it. It'll prolly blow up in a "big blue flash bang" the first time you use it.

Bilbo
AnswerID: 168413

Follow Up By: V8 Troopie - Friday, Apr 21, 2006 at 23:19

Friday, Apr 21, 2006 at 23:19
Well Bilbo, while I agree with you on the 4WD winching comment with starter motors, the one I have on my boat trailer has done sterling service for the last 7 years, dragging a 2.5 ton trailer sailer up on the trailer while most of the trailer frame is kept out of the water.
It does have a 180:1 reduction via belt and gears though and a plasma rope to handle the load.
Klaus
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Follow Up By: Bilbo - Saturday, Apr 22, 2006 at 19:32

Saturday, Apr 22, 2006 at 19:32
Hmmm,,,,,,,,,180:1. You must put the front of the boat on the trailer on Saturday morning and have it fully retreived by Sunday morning ;)

Seriously though, it works, that's what matters. At 180:1 for 2500 kgs, that motor is only pulling about 14 kgs at any given moment. Easy stuff.

If we were to use it as 4WD winch, we'd need reduction of about 500:1 - most of that would be to cater for the fact that the vehicle is stuck, it isn't floating and we'd be there all day ;)

Bilbo

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Reply By: Geoff M (Newcastle, NSW) - Saturday, Apr 22, 2006 at 07:31

Saturday, Apr 22, 2006 at 07:31
Hi,
The motor that comes standard with your Ramsey and the electric winches I'm familiar with are a series wound DC unit, not clear on their hp rating.
Starter motors are series wound DC motors too, off say a 2 litre 4 cylinder car they'll be typically in the realm of 2hp.
Now for the diffrerences, the Ramsey motor will not have an external solenoid nor will it be cast to attach to a bell housing. The armature and field lead ends on the Ramsey will be exposed externally to allow for reversing, starter motors are built to rotate in one direction only.
The starter motor will have its shaft end machined for the throwout gear to move back and forward engaging the ring gear on the flywheel. The Ramsey winch motor will be cast and machined to match the Ramsey gearbox (shaft and housing)

Whilst the use of starter motors on your Ramsey winch is certainly electrically feasible if the horsepower ratings match. It would be quite an adventure getting the shaft to match your gearbox, removing the external solenoid and exposing the armature and field fly leads to allow you to reverse it.

As some have said, plenty of people have made boat winches from old starter motors with success. My uncle made one years ago, used two starter motors. One to pay out the cable and the other to retrieve it.
These home winch builders had or have the advantage of matching the whole winch to the motor they buy rather than having the winch and then making something designed for another application fit.

Geoff.
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Reply By: fourstall2000 - Tuesday, Apr 25, 2006 at 09:00

Tuesday, Apr 25, 2006 at 09:00
I am led to believe that the Bamford winch supplied to the Army used a modified Chev v8 starter motor.
Regards
AnswerID: 168847

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