04-21-2016, 10:57 PM
Hello guys. This is a simple boring bar I made up to use for a pulley I needed for the lathe I'm working on. The pulley was made of 6061 aluminum. I used an insert I had on hand for this. The bar chattered quite easily, so I don't think the geometry was correct but I went real slow and it worked. A narrow v block was made up to help with clamping.
Block layout:
![[Image: boringBarBlock.jpg?dl=0]](https://dl.dropboxusercontent.com/s/sp110haqpepphxi/boringBarBlock.jpg?dl=0)
Finished block:
![[Image: finishedVblock.jpg?dl=0]](https://dl.dropboxusercontent.com/s/j8q15ty1txfarlo/finishedVblock.jpg?dl=0)
V Block fitment:
![[Image: vBlockFitment.jpg?dl=0]](https://dl.dropboxusercontent.com/s/v3vjc0q9k54ahl0/vBlockFitment.jpg?dl=0)
Starting bar cut with dial indicator to use for the starting point of each pass:
![[Image: startBarCut.jpg?dl=0]](https://dl.dropboxusercontent.com/s/l4as58ln9cfuvnh/startBarCut.jpg?dl=0)
Bit base cut. A 20 degree angle was also cut for the bit side face.
![[Image: barCut.jpg?dl=0]](https://dl.dropboxusercontent.com/s/zx1wfbfkb1v005v/barCut.jpg?dl=0)
Tap bar:
![[Image: tapBar.jpg?dl=0]](https://dl.dropboxusercontent.com/s/vb6a0x0687l4hl2/tapBar.jpg?dl=0)
A couple of views finished:
![[Image: topBar.jpg?dl=0]](https://dl.dropboxusercontent.com/s/9em10sgiff957bl/topBar.jpg?dl=0)
![[Image: sideBar.jpg?dl=0]](https://dl.dropboxusercontent.com/s/rkegwbfb91oqg04/sideBar.jpg?dl=0)
That's all.
Mark
Block layout:
Finished block:
V Block fitment:
Starting bar cut with dial indicator to use for the starting point of each pass:
Bit base cut. A 20 degree angle was also cut for the bit side face.
Tap bar:
A couple of views finished:
That's all.
Mark