DIY front engine sprocket extension

[steveboy25]

Heres my DIY sprocket extension as me origanel one was shor by about a inch all was needed was 3 17mm nuts two welded together and a bolt long enough and a 219 sprocket it works just as good as the origanel one just a inch or so longer its has a case round the shaft so u can see the nuts ect ect

 

[Doc Sprocket]

Not to rain on your campfire, but it has an inherent flaw... That'll be hell on the shaft and bearings. Guaranteed fail, just a matter of time.

To fix the flaw- extend it further still, and support the very outer end of the shaft with a bearing, solidly mounted to the same surface that the engine is mounted to.

 

[mckutzy]

It might be just me, But did you weld the sprocket on the nuts while attached to the block?

If so im curious where you put the ground?

 

[Doc Sprocket]

It might be just me, But did you weld the sprocket on the nuts while attached to the block?

If so im curious where you put the ground?

EEK!

 

[mckutzy]

Ya im thinking he just arc'ed his crank and every journal in the motor, not to mention the gears will take a good blast. Im hoping he didnt for his sake, but just saying...

 

[Doc Sprocket]

...Don't forget the electronics, too!

 

[mckutzy]

Oh ya if it had a starter, the magnets might be shot, but over all id think they would be mostly fine, just all the moving parts.

 

[Doc Sprocket]

Very true. We are taught (and rightly so) not to let the current pass through moving parts, as moving parts generally have a wee bit of clearance between them, causing a potential for them to arc-weld themselves in place.

 

[mckutzy]

(Similarly)Ive seen it with the bearings of large motors, when a winding slot failure grounded to the rotor(AC) and welded the bearings solid. Caused a locked rotor, and a big fiery meltdown, fortunately the thermals eventually kicked in and shut off the power as to not let the fire spread to the surrounding building.

 

[steveboy25]

All straight in with the faults....never thought off that toystory could stick a bearing next to the end thanks as for the welding it was a 308L rod tigweld also i did take the shaft out befor i did anything and preheated it to dull red and put in sand couldnt fing a better way off welding it hardened steel