rake60
Well-Known Member
- Joined
- Jul 8, 2007
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We recently finished up a job at work that had a small (.628") bore in one end.
The print called for two .090" wide shallow O-Ring grooves to be cut in that bore.
That part of the job fell into my coworkers shift.
The next day I went in and saw perfect grooves in that bore with no chatter at all.
Today he told me that he had cut the grooves with an end mill. ???
He did indeed! An end mill in a small boring bar holder.
Here's my rough copy of his mini internal grooving tool.
The flutes are simply ground away leaving one side with the top width needed for the
groove. The spiral of the flute makes it free cutting and the chip curls out of the bore
instead of binding on the tool.
And they say old dogs can't learn new tricks!
Rick
The print called for two .090" wide shallow O-Ring grooves to be cut in that bore.
That part of the job fell into my coworkers shift.
The next day I went in and saw perfect grooves in that bore with no chatter at all.
Today he told me that he had cut the grooves with an end mill. ???
He did indeed! An end mill in a small boring bar holder.
Here's my rough copy of his mini internal grooving tool.
The flutes are simply ground away leaving one side with the top width needed for the
groove. The spiral of the flute makes it free cutting and the chip curls out of the bore
instead of binding on the tool.
And they say old dogs can't learn new tricks!
Rick