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29th September 2012, 07:36 PM #1
table saw maintenance .... check first!
I'm in the middle of a project that, because I dont prepare drawings or cut lists, requires many table saw changes from dado to rip blade ... and back ... and back!
I noticed last week that a series of dados didnt match when I mitred the pieces into a frame. I found out that the blade was dropping during the cut ......
The blade raising mechanism has been stiff and rough for a long time and made a grinding noise when operated so I decided today was MAINTENANCE DAY.
I got into the bowels of the saw as best I could and found that a split tube pin had drifted out. Tapping it back stopped the grinding ,,, but not the stiffness. I started to pull it down, router table and DC hosing off, removed extension table, front and back rails off intending to remove the top. I had first made up a dial gauge jig to realign the top.
I quickly realised that getting the top off was going to be very difficult because, amongst many other reasons, the trunnions are bolted to the top. I knew than that all of my work had been wasted and I would have to fix it from inside.
When I cleaned out the cabinet to work inside, I noticed that a piece of timber was jammed under the motor which stopped it from swinging down and tensioning the belt.
At the end of all of this work disassembling and reassembling I now know that ...
- the grinding noise was due to the tubular pin which was tapped back in from inside
- the stiffness was due to a lack of lubrication which I have fixed temporarily but will get some silicon grease tomorrow AND
- the blade dropping was because when I lowered the blade to set my depth of cut, the motor was sitting on compacted sawdust, the belts weren't tensioned so the blade arbor mechanism was floating. When I ran the saw, the vibration allowed the motor to drop and pull the blade down.
MAINTENANCE DAY should have been 30 minutes of cleaning out the cabinet and a squirt of oil!
flettya rock is an obsolete tool ......... until you don’t have a hammer!
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29th September 2012 07:36 PM # ADSGoogle Adsense Advertisement
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29th September 2012, 11:05 PM #2
Well Fletty, on the up side, You have prolly saved the rest of us a lot of work.
I get that same problem with stiffness in the wind up / down mechanism. I am interested in how long the silicon grease lasts, & what others use as well.
What I use is not bad, I mix a good amount of dry Graphite Powder with a small amound of grease. It works well, but it's a messy job.
SteveThe fact remains, that 97% of all statistics are made up, yet 87% of the population think they are real.
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30th September 2012, 06:49 AM #3
Fletty, yesterday prior to seeing your thread, I thought to myself, Pat you finished that big project last week, and a yard project today, tomorrow is maintenance day on the sheds and machinery.
Thanks for reinforcing that idea
(Now, don't be concerned at the lack of projects that I have, I manage to pick up two yesterday afternoon/evening . . . from MBGitW and daughter, to add to the few others, I am starting to wonder when I can do something for myself)Pat
Work is a necessary evil to be avoided. Mark Twain
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30th September 2012, 08:45 AM #4grandad
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hi fletty, i got to know a product called never sieze, it is just brilliant to use on threads, mechanisms, i had a supply of it we used on the die hold down bolts on the big plastic extrusion machines we used to make fishing line and weed trimmer line with. i use it on all moving parts on tablesaw, jointer,bandsaws,tablesaws etc etc, and most machinery in my factory like foklifts the thing i like about the product is it does not seem to attract and hold dust. i can not speak highly enough about it and in combination with INOX same sort of product but far better than WD40 i have very little trouble with moving parts, i have just done all the moving parts on my new / secondhand panel saw and all came up a treat. cheers peter
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30th September 2012, 09:09 AM #5
Thanks Peter,
I just googled it and came up with Never Seez, a Bostik product that seems to be easily available on line so I will order some and give it a go. The oil on it now should keep me going for a few days especially seeing as it has operated without any lubricant for months!
flettya rock is an obsolete tool ......... until you don’t have a hammer!
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30th September 2012, 09:18 AM #6a rock is an obsolete tool ......... until you don’t have a hammer!
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30th September 2012, 03:35 PM #7
1430 in the arvo and the total amount of scheduled maintenance done = Nil
One five minute yard job took 1/2 an hour of toil, swearing and spud bar. The other took five minutes, but a few interruptions by mates picking what little brains that I have left, means the schedule is shot. Time to go and watch the footy . . .I am supporting Beer todayPat
Work is a necessary evil to be avoided. Mark Twain
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30th September 2012, 04:15 PM #8
I find that motorbike chain oil in a spray can is good for lubing those hard to get to bits.
- The oil wicks in quickly then evaporates leaving a greased surface.
- You can squirt a stream over a fair distance.
- It does not come off easily.
But it does gather dust.
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30th September 2012, 04:51 PM #9
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7th October 2012, 02:53 AM #10Intermediate Member
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- Feb 2012
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- North Beach SA
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