AlfaGTA
Diamond
- Joined
- Dec 13, 2002
- Location
- Benicia California USA
One of the things i enjoy about this forum is seeing how others solve setup and machining jobs.
Been a bit light here on the board so i thought i would post a few of my solutions to setup problems....
My work often centers on working on existing parts as such you often have to decide on ways to hold the part. Often more difficult than making something new where you get to choose the complete
process and steps involved....Not so with repair work.
Lots of times i need to indicate a feature where the point to check is not easily reached...Just can't get your fingers there to adjust the indicator, much less see the reading.
Here is a setup where i needed to indicate the lower cylinder locating bores down in an engine block....With indicator and mount there just is no room to get my hands in there to set the indicator...
Solution: I use my fine boring head coupled with a long small tool extension.
This extension i have had fro years, not sure where i got it or who made it...But it has been very useful. Tool is 1/2" OD and hollow through. Used "DA" style collets and closure nut...
In this case i am holding the 5/32" stem on my "interapid" indicator....(this is my go to test indicator brand)
Holding the indicator extension in the boring head allows moving it to set zero without needing to get my hands into the hole
There are times when you need to hole a part that does not have a convent place to clamp it or you need to surface a complete area where clamps on the side would get in the way...
Often parts already have threads and studs that can be in the way..or can be used to advantage.....
Her is one example...Part is a supercharger drive gear case from a type 35 Bugatti......
Need to machine the end of the casting as an assembly, want teh reference and finished surfaces to be parallel.....
Casting has studs....
I make these round hold down pucks as needed...OD large enough to bridge the distance from the stud or thread to the part edge....Generally make these around 1" tall and counter bore the center to
clear a nut or bolt, deep enough to clear the length of the bolt or stud.....
The puck is placed on the machine table and held down using a normal step block and clamp....
More to follow.......
Been a bit light here on the board so i thought i would post a few of my solutions to setup problems....
My work often centers on working on existing parts as such you often have to decide on ways to hold the part. Often more difficult than making something new where you get to choose the complete
process and steps involved....Not so with repair work.
Lots of times i need to indicate a feature where the point to check is not easily reached...Just can't get your fingers there to adjust the indicator, much less see the reading.
Here is a setup where i needed to indicate the lower cylinder locating bores down in an engine block....With indicator and mount there just is no room to get my hands in there to set the indicator...
Solution: I use my fine boring head coupled with a long small tool extension.
This extension i have had fro years, not sure where i got it or who made it...But it has been very useful. Tool is 1/2" OD and hollow through. Used "DA" style collets and closure nut...
In this case i am holding the 5/32" stem on my "interapid" indicator....(this is my go to test indicator brand)
Holding the indicator extension in the boring head allows moving it to set zero without needing to get my hands into the hole
There are times when you need to hole a part that does not have a convent place to clamp it or you need to surface a complete area where clamps on the side would get in the way...
Often parts already have threads and studs that can be in the way..or can be used to advantage.....
Her is one example...Part is a supercharger drive gear case from a type 35 Bugatti......
Need to machine the end of the casting as an assembly, want teh reference and finished surfaces to be parallel.....
Casting has studs....
I make these round hold down pucks as needed...OD large enough to bridge the distance from the stud or thread to the part edge....Generally make these around 1" tall and counter bore the center to
clear a nut or bolt, deep enough to clear the length of the bolt or stud.....
The puck is placed on the machine table and held down using a normal step block and clamp....
More to follow.......