Cross Drilling Fixture from an AXA Boring Tool Holder!
i had an idea to make a cross drilling fixture for my shenwai 1236 lathes' AXA clone toolpost.
View attachment 187318


i machined the shaft from 3/8" 12L14 hex shaft and single point threaded the drill chuck end to 3/8-24 to accept an old but new Jacobs short 1/4" capacity chuck.

View attachment 187320
i left just enough of the hex so that i can put a 3/8" wrench on the spindle to remove the drillchuck
the shaft is supported by 2 mini bearings, one inboard, one out board.

View attachment 187324

View attachment 187331
the clamping action of the sleeve in the boring bar holder is sufficient to keep the shaft in place during the cross drilling operations.


View attachment 187333

View attachment 187334

View attachment 187335

an old 19.2 craftsman drill is powering the works.:grin:
estimated total project cost= under $5 (i had everything on hand and had to assign a nominal cost:cool 2:)
thanks for looking!
What stops the shaft from walking forward and back on the bearing?
 
Could not find any ball bearings of the size I wanted (minimum 3/8ths. shaft). so had a look at needle bearings. Then realized that bushings should work. So went that route, cost of $4 for two .75/.50 x .75 porous bushings.

Had great enjoyment from getting things concentric with minimum clearances. Realized that the bushings are 'compressible' ie. the bushing/shaft clearance can be reduced by torquing the two clamp screws in the BXA holder.

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I came across this old post and though I would add my version. I used a piece of 3/4” brass I had laying around and drilled /reamed it to accept a 1/2” shaft. I tend to use this with pretty small drills so I use the drill for my feed. I get a little better “feel” this way. I also needed to tap the hole, so I added the cross bar for tapping. It works great and cost very little to make.97E3B6E9-7D07-403E-B325-B9CE18181264.jpeg
 
I came across this old post and though I would add my version. I used a piece of 3/4” brass I had laying around and drilled /reamed it to accept a 1/2” shaft. I tend to use this with pretty small drills so I use the drill for my feed. I get a little better “feel” this way. I also needed to tap the hole, so I added the cross bar for tapping. It works great and cost very little to make.View attachment 306286
Nice work !!!!
I hope you get as much use from yours as I do with mine
 
Seems like it was Last summer you made this up, not (4) years ago. Time is going by too fast. :concerned:
Cross Drilling Fixture from an AXA Boring Tool Holder!
i had an idea to make a cross drilling fixture for my shenwai 1236 lathes' AXA clone toolpost.
View attachment 187318


i machined the shaft from 3/8" 12L14 hex shaft and single point threaded the drill chuck end to 3/8-24 to accept an old but new Jacobs short 1/4" capacity chuck.

View attachment 187320
i left just enough of the hex so that i can put a 3/8" wrench on the spindle to remove the drillchuck
the shaft is supported by 2 mini bearings, one inboard, one out board.

View attachment 187324

View attachment 187331
the clamping action of the sleeve in the boring bar holder is sufficient to keep the shaft in place during the cross drilling operations.


View attachment 187333

View attachment 187334

View attachment 187335

an old 19.2 craftsman drill is powering the works.:grin:
estimated total project cost= under $5 (i had everything on hand and had to assign a nominal cost:cool 2:)
thanks for looking!
 
I understand that this is a really old thread but you don’t by chance have the bearing numbers you used do you?
Cross Drilling Fixture from an AXA Boring Tool Holder!
i had an idea to make a cross drilling fixture for my shenwai 1236 lathes' AXA clone toolpost.
View attachment 187318


i machined the shaft from 3/8" 12L14 hex shaft and single point threaded the drill chuck end to 3/8-24 to accept an old but new Jacobs short 1/4" capacity chuck.

View attachment 187320
i left just enough of the hex so that i can put a 3/8" wrench on the spindle to remove the drillchuck
the shaft is supported by 2 mini bearings, one inboard, one out board.

View attachment 187324

View attachment 187331
the clamping action of the sleeve in the boring bar holder is sufficient to keep the shaft in place during the cross drilling operations.


View attachment 187333

View attachment 187334

View attachment 187335

an old 19.2 craftsman drill is powering the works.:grin:
estimated total project cost= under $5 (i had everything on hand and had to assign a nominal cost:cool 2:)
thanks for looking!
 
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