The Tool Post Grinder is the tool of choice to repair the ends of a damaged Caterpillar pin . Link to my other TPG videos below • Machining R8 Tooling F...
thanks Max, I'm here after watching Curtis from Cutting Edge Engineering of australia make a shop made heavy duty tool post grinder. I could not figure out what it does, and now after watching your video I understand the need to do a fast clean up grinding vs the lathe. thank you for the demonstration
Thanks Dave . Yes you are dead right . We only have 2 types of 100mm wheel readily available here . 39C60LV silicon carbide or the 9A60JV aluminium oxide . Pretty anything else has to be imported on a special order . 👍
Hello Max from Brisbane. Can I suggest for the hard material slow the work rpm down a lot. Also try Abrasiflex for a 9A 60 K wheel. Good job on the pin. BC
The first part of the grinding was edited 3 or 4 times faster . The last parts are all actual rpm ! I have found with my TPG , quite often running a too slow surface speed can degrade the finish . Through experience , i have found the best finish can be achieved not directly after a fresh dress but halfway between that and a dull wheel . The wheel that i used , 9A60JV is the only readily available aluminium oxide wheel over here in 100 mm dia . 👍
Thanks, Max for taking time out of your busy schedule to pop-out a video . Nice hi-speed grinder ! And a good instructional vid on how to deal with a damaged and well worn shaft .
I have put shim stock in between the live center and center hole to get the bar to run true. That is one way to fudge it. Try plastic shim stock or aluminum foil. Could also shim the center hole to get the shaft to run true, mount a cat head and skim cut it to true that, and run the steady rest on the cathead to redrill or single point bore the center hole. If you would need that center hole true and didn't want to mar the shaft surface with the steady rest.
Gday Max, Excellent video and how to do the job properly, I’ve seen a lot of pins ground down after there been flogged with a 14lb hammer to get them out, i really enjoyed the R8 arbor series, have a great Easter mate, cheers
Just taking the high spots off brings the diameter of the damaged areas back to the original size . The high spots were caused by metal deformation on the end of the pin due to sledge hammer blows . 👍
As soon as i saw those centres i though you ain't going to use them - if the end of the shaft is mushroomed god only knows where the centres will run . I remember years a go working as a general hand at a hardchrome joint - the grinder operator spent heaps of time fixing a centre on a ram and doing the pre grind only to see the plater take to the centre with a drill bit and then a 1/2 inch tap ! A Turk vs an Italian - it was like the war in Europe had come to Australia 🤣
When I first started getting gear I bought a knock off of a Noga and I'll admit it has it's issue's. I bought a Noga later on and a very nice jeweled Federal dial indicator to go on it. The Noga and the knock off sit on my lathe side by side, I still reach for the knock off that has a Peacock dial indicator on it. I know where it's weaknesses are and how to work around them now from using it for so long. For the life of me I don't know why I don't use the Noga, all I can think is where I have used the other one for so long it's just become habit to use it. I will admit if I am having to use a test indicator and dealing in the .0001 then I use the Noga because it is sturdier but for dial indicators the other one does the job and I can hit the mark with it if I'm dealing in the .001 range without issue. Strange how we become creatures of habit.
@@swanvalleymachineshop Ordered one similar to yours today. I had one that was a cheaper one my father had bought years ago but he let it rust up and the mag knob didn't want to turn. I ended up getting a Craftsman mag base with a Federal C81S for $42 US plus shipping. Both pieces look like new, someone had scribed 1978 on it.
Max, on a job like this do you ever bother to "repair" the bad centers? Or is the pin likely to never survive its use well enough to make it back to a Machine Shop for a second repair?
@@swanvalleymachineshop Thanks for the reply. That is really interesting to be able to make such high precision expensive instruments using a lathe and a tool post grinder.
Binge watching your R-8 series is where I got hooked, & I've loved watching everything since then, but I do miss the chickens. 👍 for another good video. edit: Good Easter to you also Max.
Hi Max, Each to his own, but whenever I'm doing something like this I move the steady as close to the chuck as I can and set the steady there, then move it up to the other end and fasten it in place, if both ends are the same diameter, you will be dead knacker.
Max, Great to see you’ve found time to make videos again. I can only wonder how many jobs like this you’ve done to get it done so quickly and make it look easy. Cheers, Will
Hi Max, like the Macpherson chart on the wall, bought a 4" Dawn fabricated vise from them back in the seventies in Vic Park. We had a huge flat bed Macphersons lathe which was pretty well flogged out and replaced it with a LeBlond Regal. Blackwoods has the market pretty well covered now.
Great video Max, really nice TPG unit you have there, and I enjoyed your R8 series! As usual, top drawer stuff mate, another one saved! Well done. Cheers, Jon
How did I miss this? Good to see you back. Not just Caterpillar, my Dodge truck has mixed imperial and metric hardware. Annoying as hell. Great job! All the best! Eddie
That job takes me back nearly 40 years, when I spent 3 happy years as a machinist in a hydraulics repair shop, and studying in the evenings. From memory, the Cat shafts had the best case-hardening. I was wondering: would a light grinding pass across the faces to square them from the mushrooming have any benefits? Thanks for sharing.
Hi Max. This is a Terrific Video from start to finish, with all the Pro's & Con's associated in setting up & how to machine the job back or close to Fitment Tolerances. Well done
thanks Max, I'm here after watching Curtis from Cutting Edge Engineering of australia make a shop made heavy duty tool post grinder. I could not figure out what it does, and now after watching your video I understand the need to do a fast clean up grinding vs the lathe. thank you for the demonstration
No worries , Cheers 👍
Me too!
Thanks Max!
Same thanks max
Creative use of Pig Mat there, I've got a roll for cleaning up spills, but now I know what to use with my spindle grinder.
A good use for them ! 👍
Hi Max, Very useful demonstration. I found that the selection of the grinding wheel gets really critical with some steels too.....Dave
Thanks Dave . Yes you are dead right . We only have 2 types of 100mm wheel readily available here . 39C60LV silicon carbide or the 9A60JV aluminium oxide . Pretty anything else has to be imported on a special order . 👍
Hello Max from Brisbane. Can I suggest for the hard material slow the work rpm down a lot. Also try Abrasiflex for a 9A 60 K wheel. Good job on the pin. BC
The first part of the grinding was edited 3 or 4 times faster . The last parts are all actual rpm !
I have found with my TPG , quite often running a too slow surface speed can degrade the finish . Through experience , i have found the best finish can be achieved not directly after a fresh dress but halfway between that and a dull wheel .
The wheel that i used , 9A60JV is the only readily available aluminium oxide wheel over here in 100 mm dia . 👍
Thanks, Max for taking time out of your busy schedule to pop-out a video . Nice hi-speed grinder ! And a good instructional vid on how to deal with a damaged and well worn shaft .
Thanks 👍
Very good job MAX,,the tool post grinder is ok tool
They are a great tool . Don't get used often but they have their uses . 👍
And after all this carefully executed precision work you did,I bet someone will put this pin back in place using a sledge hammer...
Yes , but at least it will fit properly with a few light taps ! 👍
Add a comment Max--turn up your volume I cannot hear you..regards E
Ok . 👍
Good fix dude happy easter. That diaper looks like it makes a pretty good filter good idea might get some of those. We call the diapers here haha
Lol , good name for them ! 👍
I have put shim stock in between the live center and center hole to get the bar to run true. That is one way to fudge it. Try plastic shim stock or aluminum foil. Could also shim the center hole to get the shaft to run true, mount a cat head and skim cut it to true that, and run the steady rest on the cathead to redrill or single point bore the center hole. If you would need that center hole true and didn't want to mar the shaft surface with the steady rest.
No worries . All sorts of uses for shim stock & rolly papers ! 👍
Gday Max, Excellent video and how to do the job properly, I’ve seen a lot of pins ground down after there been flogged with a 14lb hammer to get them out, i really enjoyed the R8 arbor series, have a great Easter mate, cheers
Thanks . I had to use a large hyd press to get that one out , the pin had been installed with the old 14lb adjuster last time ! 👍
Nice job Max, have a good Easter
Thanks 👍
Wish I could do that. A chuck up for me is so often the beginning of an expensive disappointment.
It can happen ! 👍
when you grind off the high spots , doesnt that decrese the overall diameter that the customer now needs a oversize seal or bearing ?
Just taking the high spots off brings the diameter of the damaged areas back to the original size . The high spots were caused by metal deformation on the end of the pin due to sledge hammer blows . 👍
As soon as i saw those centres i though you ain't going to use them - if the end of the shaft is mushroomed god only knows where the centres will run .
I remember years a go working as a general hand at a hardchrome joint - the grinder operator spent heaps of time fixing a centre on a ram and doing the pre grind only to see the plater take to the centre with a drill bit and then a 1/2 inch tap ! A Turk vs an Italian - it was like the war in Europe had come to Australia 🤣
That would have been interesting to watch !!! 👍
What connects the indicator dial to the knob. Is it that, that is 180 degrees out?
It's just a standard mag base indicator holder . 👍
That was really informative, Max. Thanks.
Cheers Rob . 👍
Hello Max,
I always enjoy your machining video as I always lean something... Thank you...
Take care.
Paul,,
Thanks 👍
Thanks for sharing 👍 and Happy Easter to you and your family.
Thanks 👍
Nice repair on the shaft Max 👍 have a good Easter mate
Cheers 👍
Nice work Max.
You saved an otherwise piece of scrap.
Good fix.
Great content showing the patience of a good set up.
Thank you, EM.
Thanks 👍
When I first started getting gear I bought a knock off of a Noga and I'll admit it has it's issue's. I bought a Noga later on and a very nice jeweled Federal dial indicator to go on it. The Noga and the knock off sit on my lathe side by side, I still reach for the knock off that has a Peacock dial indicator on it. I know where it's weaknesses are and how to work around them now from using it for so long. For the life of me I don't know why I don't use the Noga, all I can think is where I have used the other one for so long it's just become habit to use it. I will admit if I am having to use a test indicator and dealing in the .0001 then I use the Noga because it is sturdier but for dial indicators the other one does the job and I can hit the mark with it if I'm dealing in the .001 range without issue.
Strange how we become creatures of habit.
Lol , I still use my wonky old mag bases ! One day i will splash out on a Noga . 👍
@@swanvalleymachineshop Ordered one similar to yours today. I had one that was a cheaper one my father had bought years ago but he let it rust up and the mag knob didn't want to turn. I ended up getting a Craftsman mag base with a Federal C81S for $42 US plus shipping. Both pieces look like new, someone had scribed 1978 on it.
Very interesting video max,keep'um coming.
Thanks 👍
Max, on a job like this do you ever bother to "repair" the bad centers? Or is the pin likely to never survive its use well enough to make it back to a Machine Shop for a second repair?
If it was critical to be able to carry out the job , then yes . In this case it would take too much extra time for no gain .. 👍
Root n toot n six gun shoot n I found Sam.
Lol ! 👍👍👍
Nice one Max another hands on how to video. Cheers Tony
Thanks 👍
You deserve some beers after that video Max. Good to see another great video from the Swan Valley MS. Cheers
Trevor
I had some last night ! 👍
can you make a cylindrical master square or a test bar using a tool post?
Yes , you could use the tool post grinder . 👍
@@swanvalleymachineshop Thanks for the reply. That is really interesting to be able to make such high precision expensive instruments using a lathe and a tool post grinder.
Binge watching your R-8 series is where I got hooked, & I've loved watching everything since then, but I do miss the chickens. 👍 for another good video.
edit: Good Easter to you also Max.
Thanks . I do not miss the chook shite everywhere but we will get some more chooks later on ! 👍
Thanks Max, another enjoyable and educational video. Hope you are enjoying a break
Thanks . Yes it's good to have a day off ! 👍
MASHA.ALLAH.GOOD.SLO.WERK
Thanks 👍
Thankyou for another great video using the tool post grinder!
Thanks 👍
Hi Max, Each to his own, but whenever I'm doing something like this I move the steady as close to the chuck as I can and set the steady there, then move it up to the other end and fasten it in place, if both ends are the same diameter, you will be dead knacker.
Yes , that's one of many methods to set the steady . 👍
Max, Great to see you’ve found time to make videos again. I can only wonder how many jobs like this you’ve done to get it done so quickly and make it look easy. Cheers, Will
I have a delay in materials for the new shop . 👍
Good one Max.
Thank you for showing us.
Useful TPG.
Thanks 👍
G'day Max, great one my mate, lovely work as always 👍
Cheers Ralfy 👍
Great to see you back Max, it's been way to long.
Thanks 👍
Really interesting explanation and demo of using a tool post grinder, Thanks
Thanks 👍
Nice work as per usual Max. I like your tool post grinder too. Is that one branded “Waldown”? Cheers 🍻. Aaron
PS: yes that was an excellent series 👍
Thanks Aaron . Yes , it is a Waldon model CO 👍
Enjoyed…nice discussion/demonstration/repair
Thanks 👍
Good one Max say Hi to Sal the check out chick at portheadland Cat house ....
I have not seen her in ages !!! 👍
@@swanvalleymachineshop she was home looking after her mum here in Canberra . She had nothing but nice things to say about you ..
@@markfoster6110 Ha Ha , i can imagine !!!
Very nice Max.
Thanks Gary . A perfect little job for the TPG ! 👍
Hi Max, like the Macpherson chart on the wall, bought a 4" Dawn fabricated vise from them back in the seventies in Vic Park.
We had a huge flat bed Macphersons lathe which was pretty well flogged out and replaced it with a LeBlond Regal.
Blackwoods has the market pretty well covered now.
I have a few of those old charts . 4 digit phone numbers on them ! 👍
Great video Max, really nice TPG unit you have there, and I enjoyed your R8 series! As usual, top drawer stuff mate, another one saved! Well done. Cheers, Jon
Thanks Jon . I was long over due from a break from the new shop build ! 👍
nice job max
Cheers 👍
Well mate, that’s the first time I have seen that done and your explanation throughout was great. Thanks for another top show 👍🇦🇺
Thanks 👍
How did I miss this? Good to see you back. Not just Caterpillar, my Dodge truck has mixed imperial and metric hardware. Annoying as hell. Great job! All the best!
Eddie
Cheers Eddie 👍
Hi Max, Thanks for showing us the repair. Could you tell us the wheel type and grit you used. Cheers Kevin
Hi Keven . The wheel is an Abrasiflex 9A60JV 100mm dia . 👍
Happy Easter Max!
Hey , same John . Have a good one ! 👍
Hi Max That was a great repair of the shaft, very good explanation of only removing the high spots. Cheers
Thanks . 👍
Max, Have yourself a wonderful Easter and like always, till next time be safe...
Hey thanks . Have a good one as well . 👍
great job Max!
Cheers 👍
That job takes me back nearly 40 years, when I spent 3 happy years as a machinist in a hydraulics repair shop, and studying in the evenings. From memory, the Cat shafts had the best case-hardening.
I was wondering: would a light grinding pass across the faces to square them from the mushrooming have any benefits?
Thanks for sharing.
Thanks . Face grinding would take up too much time for what these things do . 👍
Very interesting. Thanks for all the details. 👍👍😎👍👍
Cheers 👍
Great stuff, I’m going to go all out and get a nicewaldown one - thanks Max you’re very generous with you knowledge luckily for us learners. Cheers
Thanks 👍
Nice save of the shaft. And thx for the vid.
Cheers 👍
Hi Max. This is a Terrific Video from start to finish, with all the Pro's & Con's associated in setting up & how to machine the job back or close to Fitment Tolerances. Well done
Thanks 👍
Thanks Max. Always good learning sessions. Have a quiet Easter.
Thanks . Yes , just taking it easy this Easter ! 👍