How to build a GWS Gear Box - RC Groups
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Dec 03, 2003, 03:31 PM
enigmabomb's Avatar

How to build a GWS Gear Box

Here is a picture tutorial of how to assemble your own GWS Gear Box. Total Cost: 12.20 plus shipping. I picked up everything from

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Firstly, Assemble your parts together:

2 GWS Bearings
1 EPS Frame
1 Spur Gear
1 Prop Shaft
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Dec 03, 2003, 03:32 PM
enigmabomb's Avatar
Open everything being careful not to lose any small pieces (I almost lost a washer) and put the bearings inside the GWS EPS Frame. They should be snug.
Dec 03, 2003, 03:34 PM
enigmabomb's Avatar
Next, I like to put the Spur Gear on the shaft. This lets you get it on really good without putting any strain on the gear box frame. I push the end of the shaft against the edge of the table and push on the gear. The final result is a nice, tight fit.
Dec 03, 2003, 03:38 PM
enigmabomb's Avatar
Next, I put the shaft inside the frame. NOTE: Make sure to slide it in from the FRONT OF THE FRAME. So the spur gear should be moving towards the frame. It seems simple, but this alluded me for sometime. I was removing bearings and such.

Put the washer included with the prop shaft on the end of the shaft.

After that's done, it's time to install the dreaded "E-Clip" I have a good method. Get a pair of needle nose pliers and put it in the very end. Press it in just enough so it stays without you having to hold it.
Last edited by enigmabomb; Dec 03, 2003 at 03:41 PM.
Dec 03, 2003, 03:42 PM
enigmabomb's Avatar
Once the clip is on there so it doesn't want to fall off, Put the pliers sideways, and finish squeezing the clip on. See the attached picture. It should make a 'click'
Dec 03, 2003, 03:43 PM
enigmabomb's Avatar
Admire your hard and precise work. It should spin freely. You should feel good, this was not an easy process.
Dec 03, 2003, 03:49 PM
Hacker motoren rules :)
Philip Thulin's Avatar
why not buy the whole gearbox complete with motor and spinner redy to use for $17 instead?

Dec 03, 2003, 03:52 PM
enigmabomb's Avatar
That 5 dollars is like 4 prop shafts or 3 propellers. I could spend the money, but with a little ingenuity I can save 5 bucks. Every little bit counts when you're a student.
Dec 03, 2003, 03:58 PM
KSU Flyer's Avatar

You can buy an EPS100 motor with gearbox w/ ballbearings from Balsa Products for $12.00...

Dec 03, 2003, 03:59 PM
I told them, I was drunk.
temp_oct's Avatar
I think you can buy assembled EPS350 gearbox (with spinner) from for $11.80 + $2.50 S&H. It is cheaper than built the whole thing from all the parts (well, compared to my LHS anyway )
Dec 03, 2003, 04:03 PM
j_z_123's Avatar
Well, This is good to know, if you bend your prop shaft. Not that I do

Dec 03, 2003, 04:57 PM
Registered User
The EPS-100 gearbox is just a fraction of an inch smaller in diameter than the EPS-300/350 gearbox, and, as Mike says, can be bought with 280 motor for $12. I now have quite a collection of 280 motors since I've been buying these to convert to Johnson 250 use.
Dec 05, 2003, 12:44 PM
Hacker motoren rules :)
Philip Thulin's Avatar
Im a student...

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