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Polishing in bearing fits on a T303 shaft

I have a customer from whom I've received many hardened motor shafts for modification. It's a pain in the ass. Totally doable, just not fun. I proposed to him that instead I make them from scratch in stainless. This appealed to them because there is a weather exposure element for the shafts.

The shaft has two bearing fits. One is 4mm, the other a bit bigger, for scale. A couple other precision features. The bearing fits are the nut of it though.

My Whacheon will give me .0003"- .0005" oversize on the bearing journals repeatably; I did a bunch tonight. So that's how much I need to polish off. When I did the prototype shaft for them, I polished them in with 600-grit Emory and it was quick and seemed like a workable process.


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Size of sqaure shank on taps

I am trying to find the size of the square shank on a 5/8-11 tap. I have the tap on order but I need to make or buy a extension so I can drive the tap down beside some obstructions. If I knew the size of the square drive end I can make the extension ahead of time. I believe there is a standard where several taps in order use the same drive size then it jumps up for the next few etc. Maybe it is a standard size so I can buy a socket designed for square nuts. I have a extended tap handle but it only goes to 1/4 or maybe 3/8. I know it will be too small for 5/8.
I am hoping 5/8 is the same drive size as 1/2 since I do have some stuff for 1/2" I could probably modify.
Bil lD.


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Unusual Wear on a Boring Bar

Have you ever seen this kind of wear?

It's a 3/4" carbide shank, with a brazed-on steel head.

The bar has not been used much (compared to the one it replaced). The old bar had been used for 5x as long as this one, showed no signs of this kind of wear, then got crashed.


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machining splines on a shaft

I have a Rotex vertical head that has the threads on the spindle nose about worn out. It has the double taper Y type collets. I am thinking of either machining a ER20 collet on it (will be very close for the threads if I use the mini nut with M24 X 1.0P threads) or making a new shaft with ER20. I could use a PCH-ER20-1000S-10L from Craftsman Industries Inc. Which has the ER20 nose and a 1" shaft 10" long which is just the length I need. My only problem would be the splines on the end. I looked in the Machinery handbook but they start off with a .75 shaft. I have a .625 shaft with 6 straight sided splines. The splines are .150 wide and have a root dia. of .530. I don't know how to figure out what cutter I would need for this. I could do it with 2 slitting saws and mill out the middle but I was hoping to find out what the real cutter would be for this with the radius for the minor dia. Any other info needed let me know. Thanks for the help.



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Inputs on Removing Stuck SS Tube


I need some advice. Here are photos of a "Slide Plate" that functions as a filter on a plastic compounding extruder. It's 32" x 12" x 2", made from 4140.



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Hundreds of amusing networking websites action affluence for us to bolt up with our friends, accomplish new friends, allotment our belief or activity tips, and apprehension continued absent relatives. But Facebook allows us to get more. F business has become the a lot of frequently heard chat in the business world. With added than 750 actor users all over the world, Facebook has acquired to be addition a lot of able approach to advertise articles or casework with unparalleled business power. But registering a facebook account, afterlight advice consistently and creating a page are just basics to footfall into F-commerce world. For a acknowledged business on Facebook, you charge to apperceive some abstruse tips and tricks.

1. Actualize a great, complete contour with affiliation to your articles or services. A abounding featured contour is the key to allure humans to appearance it. If you accept a lot of viewers, you could accept abounding association who are absorbed in your commodity or services. An adorable Facebook contour should cover your avatar, acquaintance data, website address, education, plan expertise, hobbies, admired movies and games.


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WTO cardinal on Sino-US e-payment welcomed

A agent for the Ministry of Commerce (MOC) on Monday accustomed a cardinal by a World Trade organization (WTO) altercation console set up afterward accusations by the United States adjoin China's administration of cross-border cyberbanking payments.

In a address appear by the WTO on Monday, the altercation console absolved U.S. accusations apropos China UnionPay's bazaar cachet at home, cardinal that measures by China accept not barred adopted account providers from entering the Chinese market, Shen Danyang said.


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Expert Advice on Exporting

Get your ducks in a row in your bounded bazaar afore even attempting export. Exporting is badly added complicated than accessing the bounded bazaar and is generally not added profitable.

Focusing on primary bazaar analysis afore attempting to admission a bazaar becomes acute in free whether the befalling has abiding sales activity that will be able to compensate the antecedent start-up costs complex in accepting admission to the market.

Top Tips:


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