Tuesday, February 13, 2024

Roxey Mouldings 7G40-18 gearbox

 

7G40-18 gearbox
In the box with the Sentinel is this gearbox from Roxey Mouldings. Like most of these sort of things, it folds up from flat. One slight difference is that one side is seperate, and soldered on then ready. 

Everything lined up perfectly, and the tabs dropped into their slots with only a tiny bit of wiggling. The bearing holes had to be opened out with a tapered reamer, as I would expect, but the whole job only took a few minutes. There are slots for the screws in the motor, and these benfited from a few strokes of the file to open up. Some Blu-Tack in the screw heads was also helpful.

There are some really nice features such as access holes for the grub screw in the work gear. 

Turning the motor over by hand, everything is super smooth, and all feels solid. 


The only problem is that the sides are only a couple of mm smaller then the Sentinel wheels. That's not going to work. I'll have to find another home for it, and an alternative drive train for the loco. So, it's going back in the box for a while to let me figure it out...

2 comments:

Luke Stevens said...

Hi Phil, what is the diameter of the gear wheel in comparison to the diameter of the wheel tread at the face? From your various picture it too looks very close. Luke

Phil Parker said...

Not much more than a millimetre. This kit came with motor, wheels and gears, but not necessarily the right ones!