Thread: bushing or not bushing

Originally Posted by nadroj

Aluminium on polished steel is a good bearing combination, but a bush is a quality point, that someone might appreciate when it comes to service it, many years later perhaps. It means a quick repair rather than a slow one.
Also, a sintered bush that is impregnated with lubricant will be cleaner, and not need to be oiled routinely.

Jordan

I admit it.i was thinking to make less machining time.since I have to embedded busing always need to do drilling with endmill to make sure smooth insert of bush. but as you mention about quality sure it would up by bushing so I will stick with it.
thanx for suggestion

Originally Posted by Ueee

Its a very sleek unit, i like it. With the right templates there would be no end to what you could do. The only thing i might suggest is to use a spiral flute cutter though, in harder timbers the straight one will struggle unless you take it real slow.
Love to see a vid of MK2 when it is done.

Ew

absolutely right.spiral upcut flute will give much smooth ,fast and clean cut.i do have 1/2 inch upcut spiral carbide bit but I don't have 3/8 inch.i must need to import it from USA.so next time I will try with spiral.now my this design is final and have to come with dust extraction system idea.
thanx for comment.

Video required!!!

Originally Posted by forp

Video required!!!

please click here for video Kuldeep Singh - YouTube
you can find all the video.thanx

Hi hillpanther,
I took a look at your video. I'm impressed. Very nice work !

Regards:
BaronJ.

Originally Posted by BaronJ

Hi hillpanther,
I took a look at your video. I'm impressed. Very nice work !

Regards:
BaronJ.

Thanx BaronJ,
glad you like it.thanx for watching.

Very impressed with the machine, considerable thought has gone into it.
Just wondering where I could pick up a router motor like the one you have in it?

Originally Posted by GSRocket

Very impressed with the machine, considerable thought has gone into it.
Just wondering where I could pick up a router motor like the one you have in it?

I have import it from USA .since you are from Australia and have 240 voltage supply so better to buy it from UK from toolstop
or if you don't mind less power and small collet size than buy Makita RT0700C from local dealer.

Hi again, thanx for your precious suggestion.i just came to know that the linear shaft I m using is Hard grind but not chrome which means in the future chance to get rust.how about if I use precision brass shaft.i have just bought some brass shaft to compare.the quality is very good and nicely polished.i m attaching the picture for better understanding with hard grind linear shaft and brass one.

Brass/aluminium or brass/brass are not good bearing combinations, I think.
Can you use a plastic tube, heatshrink tubing etc to cover the exposed part of the steel shaft?

Jordan

Originally Posted by nadroj

Brass/aluminium or brass/brass are not good bearing combinations, I think.
Can you use a plastic tube, heatshrink tubing etc to cover the exposed part of the steel shaft?

Jordan

I never thought about it.. very good idea.but my bush is not made from aluminium.
here is my bushing
let me know your thought about it.if it success or not.if not then I will use your suggested method

I would ask the supplier of the sintered bushing about the suitability of use with your proposed shaft materials.

Jordan

Originally Posted by nadroj

I would ask the supplier of the sintered bushing about the suitability of use with your proposed shaft materials.

Jordan

thank you very much.much appreciate

Correct me if I am wrong but you might get electrolytic corrosion with aluminium and brass.
Love Jordans idea of the heat shrink but worry about any condensation that might form on the shaft during heat shrinking and getting trapped underneath.
Depends on the shaft temperature at the time I suppose.
I'd still go with Jordans idea though, brass might be a bit soft as well.

Phil

Hi hillpanther,
Since you are using self lubricating bushings, I would stick with the steel shaft. If that machine were mine I would wipe it down with an oily rag after use, so rust would be a minor issue. Someone mentioned heat shrink to cover the exposed steel. I've used heat shrink many times on various jobs and not had any problems with trapped moisture. The heat when shrinking dry's any moisture away.

If you went down this path a quick wipe with an oily cloth before putting heat shrink on would solve that problem.

A nice but potentially expensive idea would be to just apply heat shrink tube to the ends that go into the bearings then dip the whole shaft into paint or the plastic stuff that is used for tool handles. The heat shrink would protect the bearing surfaces from the coating used, and would be removed before assembly.

Regards:
BaronJ.

hi Baronj!!
I guess I will go with steel shaft and as suggested will apply oil after every use.since there is no any fast movement so dust shouldn't be a problem.
thanx for suggestion.