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Thread: bushing or not bushing
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15th August 2013, 10:41 PM #16Member
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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
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.
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16th August 2013, 10:50 PM #17Member
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Video required!!!
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16th August 2013, 11:02 PM #18Member
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please click here for video Kuldeep Singh - YouTube
you can find all the video.thanx
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17th August 2013, 07:47 AM #19
Hi hillpanther,
I took a look at your video. I'm impressed. Very nice work !
Regards:
BaronJ.
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17th August 2013, 07:06 PM #20Member
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17th August 2013, 08:48 PM #21Senior Member
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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?
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17th August 2013, 09:50 PM #22Member
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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.
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21st August 2013, 09:50 PM #23Member
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- Dec 2010
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brass or linear shaft
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.
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21st August 2013, 10:25 PM #24Mechanical Butcher
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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
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21st August 2013, 11:01 PM #25Member
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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
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21st August 2013, 11:17 PM #26Mechanical Butcher
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I would ask the supplier of the sintered bushing about the suitability of use with your proposed shaft materials.
Jordan
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21st August 2013, 11:28 PM #27Member
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22nd August 2013, 05:59 AM #28SENIOR MEMBER
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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
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23rd August 2013, 08:46 AM #29
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.
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24th August 2013, 03:04 AM #30Member
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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.