How To Make An Expandable Arbor For Jig Grinding Our Sine Plate.

In our next jig grinding video we will show you how we use this expanding arbor for ease of location and accuracy on the ear of our sine plate in order to grind the apposing ear which is 5 inches away, keep an eye out for it.

[@donzmilky5961]

You know i watch every machinist there is on KZbin and by far ive learned the most from don bailey. The only man to make a video so far that i can rewatch every few months and not get bored of and i can retain all of what you're saying.

[@pitu72ger]

Nice to have the voice-over with the machining sounds all together. Keep it up guys.

[@SuburbanToolInc]

We thought it added to the video, thanks for noticing.

[@ferdirunge4510]

+pitu72ger i think so, good idea, grinding is a work you need all your senses ;>

[@rickbrandt9559]

Mentoring. If you have have passed this type of mentoring on to the culture of your business , it is no wonder Suburban has the quality of tooling/reputation. Thanks for sharing. And a pat on the back to the employees that produce the tools. Retired and still learning. Like the up beat presentation. Do the employees smile too?

[@SuburbanToolInc]

We love to share information, yes they do smile.

[@MrShobar]

Nice work, as usual, Don. Many thanks.

[@SuburbanToolInc]

Thank you for your kind words.

[@egx161]

Great video Don. Great tools from ST.

[@outsidescrewball]

Enjoyed...thanks

[@SuburbanToolInc]

You welcome

[@jeffreylehn8803]

great job !! thanks .

[@SuburbanToolInc]

You are welcome thank you for the thumbs up.

[@Shermingtan]

Don could you please make a video about buying used machines and tools? What do you need to look out for when buying them? At what point is restoration or the hassle with old machines too costly or time consuming compared to a new machine? Are experienced employees that have a "feel" for older machines important? Would love to hear your experience with that, I can Imagine you have quite a few interesting stories to share with that topic. Looking forward to watching this video. Thanks for sharing your knowledge.

[@MrShobar]

+Shermingtan With all due respect to your request, I think that persons that are at least minimally knowledgeable about machine processes know WHERE the dimensions of the work must be held, including to tolerances. Therefore, based upon this, they know how to determine if equipment needs repair or not. In most cases, this requires nothing more sophisticated than a dial indicator, test gage, and a micrometer.

[@SuburbanToolInc]

I like your idea we will produce a video about used machinery and its merits in the near future.

[@ferdirunge4510]

+Shermingtan the first thing: old machine basements are solid and end-diffusion-homogen. second: the older the machine, the better you can repair it by yourself! look at modern cnc or hydraulic/electric cycle machines, you need support! third: support is inportant. check it out if you have a support in your country! there are many portals in the internet, but my favourites are special magazines, there are allways machines on the last pages, its the serious and better way to searching.

[@ferdirunge4510]

i allways use a holder for my micrometer, thats better to messure the part. is this part on 62HRC? and are you useing hard-metal-centers? i often have to grind one site gauges with a very small free-engraving betwene go and nogo. in this case, i grind like this, but i have tolerances of 0,0005mm, so my grinding deep is smaler but: i also grind in direction tailstock, that the other site of the wheel is allways scarp! perhaps you need to use a harder spring setting in the tailstock. and of course, the coolant is not only for cooling down the part, with 2,5% oil you are good to go.

[@1jtolvey]

TOOO COOOL !!

[@SuburbanToolInc]

Thank you for you comment.

[@886014]

Nice jig Don, but I'd think a slitted arbour could be tightened slightly off parallel to the bore's axis on such a short bore. What grade of steel are you using for this? I'm still keen for you to do a video discussing the various grades of steel used in various applications.

[@SuburbanToolInc]

The type of steel is 01. We double check the arbor to make sure it is parallel and square before we put it in to the jig grinder.

[@peteroleary9447]

I had the same thought; that the arbor could get cocked. Normally I would pick up the bottom and end of the plate and grind each hole to that. Maybe Don could do a video showing how to use a Jo block to pick up an edge. It's the only way I know for splitting tenths on an edge pickup. I'm pretty sure he knows how to do it :) Great channel guys.

[@SuburbanToolInc]

We do know how to do that, we will consider that for future videos.

[@geraldgepes]

Don, I've noticed you take a skim pass on the lathe before taking each cut. Why is this? I've seen a lot of lathe work done and have plenty under my belt but this is new to me. Also, what is your favorite quick change tool post? Thank you.

[@SuburbanToolInc]

SuburbanTool Inc 1 second ago Really not necessary. If I were running a lathe on a daily basis I wouldn't do it that way. Keep in mind I have not been in the shop for forty plus years, so forgive my unabashed approach. Most of the quick change tool posts have become generic but I still prefer the American made Aloris. Thanks for your comment and question. Don

[@v8packard]

I think I heard you say you fed in .012 on the grinding wheel then began your traverse. When I grind, I use a steady rest and take smaller cuts. When do you find it appropriate to use a rest? I enjoy your videos and use many of your tools. Thank you for the great work. Marc

[@SuburbanToolInc]

+v8packard It really depends on the diameter and the length of the part. For example, a part that is .5" in diameter and 18" long would probably require a steady rest. Whereas, a part that is that is 2" in diameter and 18" long would not. The type of material you're using also needs to be taken into consideration.

[@samchen4585]

using a short cylinder datum to setup a long distance concentricity，I will say it is too tough requirement. I wonder the repeatability is not very good. would you might to loose your screw and tight again after all setup, indicate again after that? I think some factor will effect it: 1. the cylindical tolerance of datum; 2.internal taper hole's concentricity and runout; 3. thread hole lead direction and flange of bolt head. BTW, it is good to see Don place a lick recently. Be wealthy.

[@Garganzuul]

"Expansion collet" seems to get a good response from search engines.

[@messenger8279]

Puts it way out of reach of a small workshop. Better to just buy one

[@SuburbanToolInc]

You are absolutely right.