My buddy @rogue60 kindly sent me a couple oilers as my Stihl 660 oiler was chineseium. He had 2 but both locked up. I managed to disassemble one no worries but broke the inner oiler gear on the second removing it.
I wanted the challenge to see if I could machine and insert the broken bit, it all works and fits, just need to test in the saw haha. In 24 hours I’ll go back over the surface to cut it to the final diameter (I need to remove about .10mm which will correct any minor eccentricity and then file a curved round taper at the intersection between the button and shaft).
I started off with a file test to see if it was hardened and it wasn’t, so I used an annealed grade 5 bolt with the right diameter head. The insert was machined to a press fit at a couple thou oversized (0.05mm) and I used some retaining compound to ease installation and extra insurance.
I’m as happy as a pig in mud - this is my first real project (apart from the oil seal sleeve) that I got to use the lathe to fix a part I didn’t have!
The damage:
File test for hardness:
A bolt that will work:
Machining off the damaged remnants of the old part and drilling a new hole:
Bolt chucked up and measured
Machining the end:
Part parted off leaving a step to file for a smooth transition and a step for where it meets the oil gear. Edges to be chamfered and 0.10mm removed too.
Parts ready to be assembled:
Press fitted into the oiler:
Now I’ll wait for the retaining compound to cure for 24 hours.
I wanted the challenge to see if I could machine and insert the broken bit, it all works and fits, just need to test in the saw haha. In 24 hours I’ll go back over the surface to cut it to the final diameter (I need to remove about .10mm which will correct any minor eccentricity and then file a curved round taper at the intersection between the button and shaft).
I started off with a file test to see if it was hardened and it wasn’t, so I used an annealed grade 5 bolt with the right diameter head. The insert was machined to a press fit at a couple thou oversized (0.05mm) and I used some retaining compound to ease installation and extra insurance.
I’m as happy as a pig in mud - this is my first real project (apart from the oil seal sleeve) that I got to use the lathe to fix a part I didn’t have!
The damage:
File test for hardness:
A bolt that will work:
Machining off the damaged remnants of the old part and drilling a new hole:
Bolt chucked up and measured
Machining the end:
Part parted off leaving a step to file for a smooth transition and a step for where it meets the oil gear. Edges to be chamfered and 0.10mm removed too.
Parts ready to be assembled:
Press fitted into the oiler:
Now I’ll wait for the retaining compound to cure for 24 hours.