Had contemplated starting a new heading, but we can stay here for awhile.
First a brief description of what is coming together, then a bit of “how I did it”.
There are five parts to the gearbox. 1) The Main Body, 2) The Side Cover, 3) The Lower Cover, 4) The Bottom Cover, and 5) the Top Cover. What are each of these functionally. The Main Body hold all of the components together, it also the motor mount.
The Side Cover carries some of the motor mounting and is the anchor for the counter shaft. The Counter shaft has the worm gear and the metal spur gear, this is assembled to act as a cluster. The worm gear engages the brass worm mounted on the motor shaft. The shaft is rotated and the metal spur gear engages another spur gear, beneath it. That spur gear engages the spur gear on the axle. The length of this cover also acts as a stop
for the Gear Box and axle assembly to keep everything in the chassis.
The Lower Cover is small but has a lot of responsibilities. I carries the second spur gear and the axle bearing and that spur gear. The Bottom Cover is a ‘Keeper’ for the axle and the bearings. It also keeps the gearbox engaged to the axle.
The Top Cover is just that, it covers the top of the gearbox.
There are two shafts, not counting the motor shaft. The gear box shafts are carried in ball bearings on each end. The first shaft is the longer of the two and has the worm gear and metal spur gear. The second shaft, is the short shaft and carries just a spur gear.
All of the set screws in all of the gears are fixed in place with Locktite (222) added. The flat head screws are also in place with locktite. All hardware is stainless steel, one exception for now, the motor mounting screws are black steel cap screws. All fasteners are 2-56, 4-40, or 6-32.
I will be providing 9 stainless steel metric phillips head M2 X 6mm, to replace the poor steel bolts in each counter weight. They are small so I send 9 in case some one loses one.
The instructions will be illustrated with photos and much printed instructions, please read the instructions. If something goes wrong and you haven’t read the instructions I am not responsible. Between Dave Goodson and I we have done this many times and have learned that there right and wrong ways of doing something.
First lesson we learned is you MUST put a flat on the third axle (where the gear box mounts). We had made this optional, but the first customer install revealed that with out the flat the gear might just spin around the axle.
On sunday, I milled the ends of the main body, 38 pieces. On Monday, I cut the blanks for the Side Cover, the lower cover and the top cover. 40 pieces each. I also milled the indent on the main body, which makes it ready for the drill jig. Today I milled theside cover both ends, the lower cover both ends and the top cover both ends and one side.
The mill is standard large mill, but everything is manual. It can become tiring. And I am tired.
Tomorrow, I will be filling out the supply of parts for a 40 piece run. Make the shafts (with flats), order the gears needed. I have most of the gears, but will need to order more to complete the run.
I guess that is it for now.
If anyone has any questions or observations, please let me know…actually just post here on the forum.
Barry - BBT