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Old 05-04-2018, 10:46 AM
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milomilo milomilo is offline
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Default Bushings and Pin

Had one of those paying jobs yesterday. I do not take too many paying jobs. This was for a oil field friend. Something for his tractor. Wanted a piece of 2" schedule 80 bored and turned for bushings. Also wanted a round bar turned to to fit inside of the pipe. He supplied all the material. I used to newly made boring bar. Worked fine.
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Old 05-04-2018, 11:14 AM
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Looks good, milo. I like those kind of straight forward jobs. I recently did a part for a wine bottle uncorker and it was a 3 setup job on the mill. Wish I had taken some pics.


But somehow this jumped out of Machining and landed here
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Old 05-04-2018, 11:17 AM
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Nice job Chris. Looks like your lathe is working good.


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Old 05-04-2018, 12:13 PM
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Looks good Chris! Did everything run fairly true from end to end for you?

If you cut the back end of the bit on the boring bar parallel to the spindle, it should give you more clearance, and let you do smaller diameter bores.


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Old 05-04-2018, 02:09 PM
Lew Hartswick Lew Hartswick is offline
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Was that really only schedule 80 ? It looked thick enough to be schedule 160 .
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Old 05-04-2018, 02:11 PM
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Quote:
Originally Posted by greywynd View Post
Looks good Chris! Did everything run fairly true from end to end for you?

If you cut the back end of the bit on the boring bar parallel to the spindle, it should give you more clearance, and let you do smaller diameter bores.


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I used a live center and snuck up on the OD to eliminate flex, as well as some emery.
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Old 05-04-2018, 04:59 PM
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Looks good, however, the geometry of the cutting tool looks
like it would deflect the bar allot.

How did it cut ?

Any chatter ?
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Old 05-04-2018, 05:29 PM
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Quote:
Originally Posted by digger doug View Post
Looks good, however, the geometry of the cutting tool looks
like it would deflect the bar allot.

How did it cut ?

Any chatter ?
No chatter. Took light cuts since it was hanging out quite far. Took a wood dowel and bans sawed a slot and used emery on the cordless drill to get a decent finish inside.
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Old 05-04-2018, 05:31 PM
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Quote:
Originally Posted by digger doug View Post
Looks good, however, the geometry of the cutting tool looks
like it would deflect the bar allot.

How did it cut ?

Any chatter ?
No chatter. Took light cuts since it was hanging out quite far. Took a wood dowel and bans sawed a slot and used emery on the cordless drill to get a decent finish inside. Too long a boring bar for a AXA tool post. Had to give it an extra crank on the top nut.
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Liberty has never come from Government. Liberty has always come from the subjects of it. The history of liberty is a history of limitations of governmental power, not the increase of it.
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Old 05-04-2018, 05:41 PM
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When I look at a tool, I figure that "lead angle" should be just about square.

Deflecting a thin bar is the big thing, and the square tool (and minimal
radius) works best to minimize deflection and chatter.
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