Thanks for showing a sketch of the bushing and discussing it. Making parts on machines is better when we see the sketch and think of a plan to get there.
Hi Mr Rucker I’ve got a top tip my great grandfather told me. When ever you are using workshop adhesive like loctite or super glue etc. Always wipe the tip of the tube with a clean rag otherwise the cap can get stuck on. He told this when I was about 8 I’m now 31 and it’s still something I do because one time I didn’t and you can guess the rest.
Keith, rule of thumb for reamers is .002 per flute. Thus a 6 flute reamer would require .012 left in the bore. Thought you might want to pass that on to your viewers. I’ve been a machinist for 43 years. That information cost me a cup of coffee many, many years ago. Best 50 cents I ever spent.
If you need a new pulley, Speed Selector makes variable speed pulleys that replace the Reeves, Hi-Lo, TB Woods and Lovejoy pulleys that went out of business or got bought. Most of the pulleys are in stock or Speed Selector will custom make if needed. They have an actual engineering department; very helpful.
Hey Keith, I know how you feel, so when they demolished a travel trailer down the street, I got the little propane heater that came out of it. I am also getting the refrigerator/freezer which is electric. I really like the way you go about doing your machine work, and even though I may have seen it before, I still like the way you talk everyone through what you are doing. By the way, on many of your videos, I have not yet seen what you are about to do. Thank you, I have learned more than my wife thinks I know, but that will remain our little secret. ;- )
Silliest thing I learned in the Navy was why Airframes had a junky stove and fridge. Sure from time to time you could smell chili cooking but for the most part they were using it for swapping out bearings.
Keith- Believe it or not, I bought a stove at a garage sale for $20 and have it clear in the back of my shop for doing this. If I was to mess with my wife's stove, I would see her sharp, pointy teeth... Great video!! Thanks, again!!
Hi Keith,thank you for your very nice and helpful Videos. I'm so sad to live on an another continent than you.Please go on with your channel in this way.A fan from Germany
I’m a new subscriber and new to metal fabrication and I have to say you sir are a true craftsman and I’m learning so much with every video how to do things the right way first time and what certain tools do and how to use them thanks for some fantastic videos big hello from London uk 🇬🇧 god bless
At least once the part is out you are probably home free. I cured the paint on a lantern tank in the oven once, it was days before the paint smell in the house was gone. Don't do that unless she is on a cruise or something. Keith, my girlfriend said you should have had a box of brownie mix in a pan and ready to go as an excuse for having the oven on.
To use the home oven you Must Have a Very understanding wife. I used to bring Motor cycle cases in and warm them up to Slide the main bearings in. UNTIL i got Caught LOL Wife said it made the Cakes Smell like CRC which i used to soak the cases in to Preserve the Bead blasted surface finish :) But it works so well Keith
Keith, Thanks for the video. A couple of observations made in your video: (1) One would think that your lead hammer has struck blows more than a couple of times. (2) You're a brave man to venture into the kitchen with machine parts! (3) Let's hope your wife doesn't have friends that watch your videos! Thanks again! Have a good one! Dave
We used an electric frying pan with motor oil and heated it till we saw wisps of smoke then it was hot enough, inner part obviously in the freezer. We used to take a can of R12 freon when it was 75 cents .
Keith, apparently I've learned a lot from you over the years I've been watching your videos -- I planned in my head how I would do this little project, and it was exactly the same process you used! Imagine that!
Keith Like the addition of the set screw between the bushing and pulley to prevent any movement... This is possibly your best step by step "production" and presentation yet thanks... Also nice to see you using that arbor press you got at Aronfest.. I remember you thinking hard about taking / buying it etc.. but see you use it a lot... I was going to buy it, but had no way to hull home.. N.P. I'll just use my DAKE screw press... Thanks again and good job.. Brian F. AKA GUSMIX on hear...
I don't often do comments here but I just thought that Dry Ice from the Grocery store can get you a fairly cold piece of metal. Admitedly it is not as cold as liquid N2 but should be good for many things. Thanks for the great video Kieth.
I talked to a man who collects cast iron cookware , he said he cleans it by putting it in his electric range oven and running a clean cycle on the oven . I know many auto machine shops cook parts rather than caustic or acid tanking . I have not tried this but seems interesting . I think most electric range clean cycles are about 800 F
For future reference, grocery store dry ice in acetone gets you down to -108F/-78C, and is very economical when compared to liquid nitrogen. The dry ice is lost of course, but the acetone can be reused, only having suffered evaporation losses.
Ha! I was just going to make the same comment as bcbloc02... Actually I have an electric fry pan with lid from a good will store - think I paid $8 for it years ago - which I used for a number of heat and fit pieces from bearings to ring gears for differentials. You can also put ATF or engine oil in the pan to increase uniformity. A friend used to use a toaster oven from good will for the same purposes.
Keith when i need to cool a part go to auto parts store and buy a can of 134 a refrigerant and cut the end off the hose that puts it in the car and spray it on the part work's great
When you aim an IR thermometer at a specular surface (mirror), you are measuring the temperature of whatever is reflected - something around ambient as you noted. (A bit of photographer's tape - like masking tape but black - placed on the object will let you use an IR thermometer on shiny objects.)
Given that large "step" inside the pulley, I'm wondering if it was also used on some other piece of equipment unrelated to the grinder. I also see that the pulley was balanced, I assume at the factory - based on the presence pf the holes drilled in its circumference. Are you going to re-balance it ? I'd like to see the method you use to do that too. Thanks a lot.
Use the old "upside down can of air" to get that temp down fast, or a bit of dry ice. Regular ice + water + salt and put the part in a ziploc, and you can get the temp below freezing real quick.
I totally agree with the wife and oven situation I put a new cleaned rear hub in the oven so I could press a new double bearing into it and my wife came home early she caught me all hell broke loose I was on the sofa for a month and she demanded a new oven lol 😂 anyone would have thought she caught me doing drugs or something note to all blokes happy wife happy life lol never piss off the missus 😂👍😂
Not nitrogen. Dry ice. My grocery store sells it. Takes your part down to neg 30. That gives me drop in bearings/shafts. Not expensive, but be careful! Get yourself a nasty burn if your stupid. Great channel, appreciate your effort!
When you need liquid nitrogen but can't justify the expense, dry ice is available at most grocery stores. That should afford a little more shrinkage for not much cost. You can pour rubbing alcohol on the dry ice for a little extra cooling effect.
And now you'll be able to continue with the job you had to delay, due to the needed repair of the pulley on the surface grinder. I guess old Ben Franklin was correct, "an ounce of prevention is worth a pound of cure".
Hi Keith, a question. For some time now I've noticed that every time you use your arbour press there's something attached to the hand wheel with a white tywrap. You haven't cut the end of the tywrap off so I'm assuming it's there for a purpose.
In some cases there is a drilled and tapped hole in the end of the shaft to put a bolt in. Could be why the step was machined in the pulley so an extra bolt can be put in so the key cant get out?
Looks like that's a balanced pulley, there's a nice divot and three holes in the rim. Any concerns about it being unbalanced, especially since it went wobble before?
It's a brave man who uses his wife's oven, ask me how I know. You used foil, that was using your head. I'll never do that again. She came home early. Good job on the pulley.
As previously mentioned, the pulley was balanced with drillings in the rim that were opposite on the shaft to the key way but your keyway is on the same side as the balance holes. I would expect the pulley to be well out of balance due to the holes and the keyway being on the same side. What effect this will have will depend on the speed of the pulley but I can't help thinking that the pulley was originally critically balanced?
I think it likely it was a mistake. I use a touch pad to thumb up videos and while dragging you can sometimes make an error. Only excuse possible in my book.
The reason you are seeing 74 degrees on the shiny part is the emissivity of the part a reflective part will cause those type of errors There are tables to compensate
Seems as though two set screws was overkill? In another video, I heard steel expands about one thousandth per 100 degrees F. Perhaps heat to 400 degrees with a two thousandths interference? This too would seem to eliminate one set screw?
Question Keith, Is there any reason why you placed the locking setscrew 180 from the key, I was taught 90 in the direction of rotation? Make any difference??
I know those drill holes around the edge of the pulley are for balancing, but it looks like they're 180 degrees opposite eachother, would an out of balance pulley cause Keith's problem of wobble and excessive wear on the shaft and pulley?
Keith, wonderful stuff, as always. A question, though; that pulley has "balance holes" in the rim. Given that this is going to go on your surface grinder, would you consider having the pulley re-balanced?
