Making a jig for 2L TC flywheel doweling.
Posted: February 6th, 2016, 3:52 pm
Hi.
I want to make a special jig for 2L TC flywheel doweling op, something like this
Therefore, I have some questions.
-could I use a scrap 1756 crank to make a jig for 2L ? I have a crank with M12 threads in flywheel flange -I want to make my own flywheel dowels from stainless steel, Φ12,00mm (tolerance -0,005/+0,005mm). You suggest in Your first book that dowells for 2L TC should has 20mm lenght. It will be not too short for 2L ? I measured a thickness of my NOS 2L flywheel flange and it has about 8mm, a hole in crank has about 19.40-20mm depht, so in my opinion it should has about 23-24mm lenght, but I based only for my measurements, I never had before fit a dowell in crank.
When I will make a jig I want to do it in this way:
-remove an old bearing
-checking a crank flange for flatness and ground it with fine stone if neccesary
-cut of a flange
-grinding a cutted place
-clean holes in jig with split fork deburrer
-check for flatness a machined place
-use it for doweling op
GC, do You have some comments for my way of making dowel jig ? I didn't make it before, so any comments based on Your experience will be very important for me. I will use a NOS OE cast iron flywheel with ARP bolts from Nissan KA24 engine, I want to make it a most safety as I can.
Sincerely Piotrek.
I want to make a special jig for 2L TC flywheel doweling op, something like this
Therefore, I have some questions.
-could I use a scrap 1756 crank to make a jig for 2L ? I have a crank with M12 threads in flywheel flange -I want to make my own flywheel dowels from stainless steel, Φ12,00mm (tolerance -0,005/+0,005mm). You suggest in Your first book that dowells for 2L TC should has 20mm lenght. It will be not too short for 2L ? I measured a thickness of my NOS 2L flywheel flange and it has about 8mm, a hole in crank has about 19.40-20mm depht, so in my opinion it should has about 23-24mm lenght, but I based only for my measurements, I never had before fit a dowell in crank.
When I will make a jig I want to do it in this way:
-remove an old bearing
-checking a crank flange for flatness and ground it with fine stone if neccesary
-cut of a flange
-grinding a cutted place
-clean holes in jig with split fork deburrer
-check for flatness a machined place
-use it for doweling op
GC, do You have some comments for my way of making dowel jig ? I didn't make it before, so any comments based on Your experience will be very important for me. I will use a NOS OE cast iron flywheel with ARP bolts from Nissan KA24 engine, I want to make it a most safety as I can.
Sincerely Piotrek.