thermal fuse identification - pencil sharpener

[clearchris]

So, my daughter asked me to fix this pencil sharpener. Turns out crayons dont work in a pencil sharpener. Lol.

I have confirmed that the motor is fine, but there was a thermal fuse that burned. Unfortunately, it didnt leave much behind. I believe it was between the two terminals. If i jump the terminals, it works. Im very familiar with thermal fuses that are down in the windings of motors, but the positioning of the thermal fuse gives me pause. Its not real close to the motor.



So, i have plenty of the common wax and spring type thermal fuses, can I sub one of those in (obviously a 110C fuse) or is there a different type that should be used here?

Thanks!

[stj]

Re: thermal fuse identification - pencil sharpener

thermal fuses are encased,
i suspect that was just a bit of fusewire to protect from overcurrent.
the crayon may have overloaded the motor & blown the fuse.

btw, they DO work on crayons

[clearchris]

Re: thermal fuse identification - pencil sharpener

Thanks!

Hmm. Any guess on sizing the fuse? I can measure starting and running amps. From my research, starting amps equals locked rotor amps, so maybe a slow blow fuse under the starting amps, but above running amps?

[kc8adu]

Re: thermal fuse identification - pencil sharpener

looks like the rating is 110 c.
molded into the block

[stj]

Re: thermal fuse identification - pencil sharpener

Thanks!

Hmm. Any guess on sizing the fuse? I can measure starting and running amps. From my research, starting amps equals locked rotor amps, so maybe a slow blow fuse under the starting amps, but above running amps?

isnt the current marked on the unit?

[clearchris]

Re: thermal fuse identification - pencil sharpener

Yes, it's 1.2a.

[stj]

Re: thermal fuse identification - pencil sharpener

so use a 2a fuse.