Clutch shaft bolt necessary?

[Gary P]

The clutch I just put on had two small hex screws. One screwed onto the key, and one screwed against the shaft. Do I still need a bolt on the end of the shaft? Is that bolt just insurance? I didn't have any fine thread bolts, which is what I needed, so we have so far just rode without it. I've been checking it periodically, and the clutch doesn't seem to be moving and all is well so far.

I just want to know how important it is. I still plan on installing one. Just curious if it is completely necessary or if it is just insurance in case the other screws fail.

 

[solomon]

As long as the set screws are tight and the keyway is in place, no you do not need the end of thread bolt. As i recall it was used for a grease zert fitting

 

[Gokartbill]

Its basically just for insurance. I've haven't used a shaft bolt on my go kart and the clutch is spinning at 5500 rpm about 3 inches from my right elbow. lol. Although I should play it safe and install one, and you should probably too! When installing the shaft bolt (with washer), it would be wise to either put a lock washer on or apply some Loctite on the threads of the bolt so it wont back out.

 

[solomon]

If installing a bolt, just use the max torque bolt. It comes with a zert fitting and washer. Simply drill a small hole in your shaft and have a self lubing clutch

 

[OzFab]

FYI: The instructions that come with a Maxtorque clutch actually state to use one or the other (either the set screws or the shaft bolt), not both

 

[MidNightIllusions]

I just did this tonight. It would be safer to install an end bolt.
I machined a collar to fit inside clutch that also presses up against clutch.

 

[Gary P]

Thanks for the replies guys. Still keeping an eye on it and it seems to be fine. Shaft bolts don't seem to be loosening. I have tons of bolts, just not any fine thread ones, which is what I need. I may pick one up next time I'm at ace or something just in case.

 

[tuneman]

Its basically just for insurance. I've haven't used a shaft bolt on my go kart and the clutch is spinning at 5500 rpm about 3 inches from my right elbow.

I hope your running a clutch/chain guard on your engine, otherwise one day you could lose that elbow and feel like

 

[Gokartbill]

I hope your running a clutch/chain guard on your engine, otherwise one day you could lose that elbow and feel like

No, but I probably should