Horizontal boring setup question

[rdewinter]

I need to bore a 1 1/2” diameter hole about 2” deep through a turned 2 ½” spindle. How do you attach a Jacobs’s chuck (with a spade bit) to the SS tailstock so you can move the quill, where the turned spindle is mounted on a faceplate, through the spade-mounted bit to drill the hole?

I’m making a grommet that fits a hole in the center of a patio table that holds the umbrella. I turned a spindle that is 2 ½” in diameter with a 3 1/4 “ diameter 3/8” thick lip. The lip is to keep the grommet from falling through the tabletop.

My first attempt at creating the grommet was moderately successful. I turned the spindle and then attempted to bore the hole through the grommet using the drill press mode. The hole was not centered. Needless to say, I was not happy!

Suggestions welcome.

[tom_k/mo]

Bob, you need a Lathe Arbor. With that, you can attach your Jacobs Chuck to the tail stock, or you can attach your 4-jaw chuck to the tail stock and use the Jacobs chuck on the Quill.

[pennview]

You need item 505603, the tailstock chuck arbor. You put it in the tailstock instead of the center and then mount the drill chuck on it.

[charlese]

Hi, Bob! Two suggestions:

1) Buy a Tail Stock Chuck Arbor http://www.shopsmith.com/ownersite/catalog/dr_tailstock_chuckarbor.htm

2) Fix a handscrew the way Ed (rieble) has shown in another post and use the vertical drill press. https://forum.shopsmith.com/viewtopic.php?p=68165&postcount=1

[JPG]

Use a Forstner bit. The spade bit will wander severely. I know, they be expensive(the good ones)!

P.S. or you could drill the 'hole' before 'turning'.

[paulmcohen]

I need to bore a 1 1/2” diameter hole about 2” deep through a turned 2 ½” spindle. How do you attach a Jacobs’s chuck (with a spade bit) to the SS tailstock so you can move the quill, where the turned spindle is mounted on a faceplate, through the spade-mounted bit to drill the hole?

I’m making a grommet that fits a hole in the center of a patio table that holds the umbrella. I turned a spindle that is 2 ½” in diameter with a 3 1/4 “ diameter 3/8” thick lip. The lip is to keep the grommet from falling through the tabletop.

My first attempt at creating the grommet was moderately successful. I turned the spindle and then attempted to bore the hole through the grommet using the drill press mode. The hole was not centered. Needless to say, I was not happy!

Suggestions welcome.

Any Jacobs chuck with a #2 Morse taper will fit in the tailstock. You will also need a 4 jaw chack for the headstock.

[charlese]

Use a Forstner bit. The spade bit will wander severely. I know, they be expensive(the good ones)!

Although I have always used Forstner bits for end boring on the lathe, I recall a post from Nick that said Forstners are not designed to be used in end grain. He recommended spade bits with more obtuse angles, you can easily make with a file.

That said, I still use the Forstners and have had no issues, however I don't understand why a spade would wander more, they have a longer side edge than a Forstner. Those edges will ride on the circumference of the hole, thus keeping the bit straighter. -(I think!) Spade bits also usually have a longer spur than most Forstners.

Here's Nick's Post - from 2008 https://forum.shopsmith.com/viewtopic.php?p=9516&postcount=18

[JPG]

Although I have always used Forstner bits for end boring on the lathe, I recall a post from Nick that said Forstners are not designed to be used in end grain. He recommended spade bits with more obtuse angles, you can easily make with a file.

That said, I still use the Forstners and have had no issues, however I don't understand why a spade would wander more, they have a longer side edge than a Forstner. Those edges will ride on the circumference of the hole, thus keeping the bit straighter. -(I think!) Spade bits also usually have a longer spur than most Forstners.

Here's Nick's Post - from 2008 https://forum.shopsmith.com/viewtopic.php?p=9516&postcount=18

Actually the spade bits ride the circumference, but only contact at two narrow points at a time. A forstner bit will ride the circumference all the way around(that is why it doesn't need a lengthy spur once started). IMHO the BEST bit is an old fashioned auger bit(with plain center spur). It will ride the circumference like a forstner, but can more agressively cut the end grain. They have the outer spurs like a forstner also. But then they have been out of favor due to cost. An old brace type bit with a trued shank and 'unthreaded' center spur will do well.

[SDSSmith]

I need to bore a 1 1/2” diameter hole about 2” deep through a turned 2 ½” spindle. How do you attach a Jacobs’s chuck (with a spade bit) to the SS tailstock so you can move the quill, where the turned spindle is mounted on a faceplate, through the spade-mounted bit to drill the hole?

I’m making a grommet that fits a hole in the center of a patio table that holds the umbrella. I turned a spindle that is 2 ½” in diameter with a 3 1/4 “ diameter 3/8” thick lip. The lip is to keep the grommet from falling through the tabletop.

My first attempt at creating the grommet was moderately successful. I turned the spindle and then attempted to bore the hole through the grommet using the drill press mode. The hole was not centered. Needless to say, I was not happy!

Suggestions welcome.

Hi Bob,
I have a tailstock chuck arbor you can borrow if you would like to give it a try before you buy one.

[JPG]

Hi Bob,
I have a tailstock chuck arbor you can borrow if you would like to give it a try before you buy one.

Rob will do anything to get an impressionable shopsmith owner into his lair!:D Wish I was near San Diego!