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Bridge Port Milling machine collet holder

Don Oberholtzer

Sponsor
Last Subscription Date
02/18/2018
I have a very old mill and would like to find a collet holder for a #9 spindle. By chance would there would be any still around. 330-482-4097
 

Pete Spaco

Registered
I too, have an old vertical mill. Mine is a US Machine Tool mill. It is a round column machine and also has a B&S #9 spindle taper.

Here are several sources for collets (not necessarily collet holders) that came up on a Google search just now:

https://www.ebay.com/bhp/brown-sharpe-9

http://www.penntoolco.com/brown-sha...FE84NulqskX4f7Fa1lI28ccPOHIGU8QhoCbksQAvD_BwE

Surprise!
https://www.walmart.com/ip/9-Brown-...5IFeldxeOpdapiksjVGxmWj9ww0m_WihoCr0AQAvD_BwE

Over many years I have gotten my mill pretty well tooled up by visiting used machinery dealers, as well as using the internet.
I even found 2 double angle collet holders with collets (ZZ type 1/16- 1/2 by 64ths, I think) and a larger set of the same style. Note that "double angle" collet designs seem to have changed a lot over the years, so don't expect to have a wide choice to fit the B&S #9 spindle.

You will need a boring head, too.
I suggest you go here for starters:
https://www.practicalmachinist.com/...but-ebay-has-b-s-9-boring-head-shanks-315540/

I pointed a guy there a few months ago and he complained that someone on that site gave him some grief, so go there with a thick skin.

Pete Stanaitis
---------------
 

Richard W.

Registered
Some people have been known to re-cut the spindle to take R8 tooling. This would open up a whole new world of tooling options.

Richard W.
 

Don Oberholtzer

Sponsor
Last Subscription Date
02/18/2018
Thanks for the info, I did check the info as posted and see little for the milling machine. I have been looking at a new holder and a set of collets, not sure about quality, but have little choice on the market.
 

Don Oberholtzer

Sponsor
Last Subscription Date
02/18/2018
The collets I use must be removed from the draw bar each time. Most of my tooling are left over from a much larger shop with different milling equipment, I also must change pulleys when I need to adjust speeds. I know there is a adapter that can be user for speed control and change my mill from 3 phase and I plan to make that change. Any ideas are welcome. Thanks
 

Pete Spaco

Registered
Consider using the largest collet that you have as a basis for obtaining straight shank tooling to fit it so you don't have to go through the drawbar routine all the time.
Hopefully you have one that's at least 1/2", 3/4" would be a lot better.

If you have a lathe, you can prepare adapters.

Leave the 3 phase motor on the mill and get a VFD that runs on single phase power and gives you variable speed control.

Pete Stanaitis
---------------
 

Don Oberholtzer

Sponsor
Last Subscription Date
02/18/2018
Thanks for all the input and suggestions. I did find a collet holder to fit my spindle and will buy it and new collets.. After talking to different machine shops they all said there not enough stock in the spindle to make the adj. to a R8 taper. Most of the comments I read was to scraped the mill. Thanks to all for the comments.
 

Don Oberholtzer

Sponsor
Last Subscription Date
02/18/2018
Would you email me additional information on the speed control (VFD) you use. I did look them up on line, but see a wide range of suppliers and controls. Would appreciate any info.
 

Renny

Registered
I have a 2HP, 3 phase milling machine I used a Huanyang 3KW 220V inverter VFD variable speed drive that i purchased from Alliexpress. I used it as a phase converter as well as speed control. I know it is Chinese, but read the reviews and talked to people using them, and had positive feedback. After installing it, i am very impressed, and it is as easy to program and use as the more expensive drives we get here. I am an electrician, so have experience with drives and am quite impressed with it. I did oversize it for the application.
 

Pete Spaco

Registered
I'm no expert on vfd's.
My only comment:
It seems that at about 1.5 hp, it makes most sense to go with a 220 volt INPUT VFD. Below that horsepower, there are plenty of 120 volt VFD's to buy.
I don't think I'd shop by lowest price alone. read carefully about features, then ask more questions here to get help from the better informed folks.

Also, youtube is loaded with videos about VFD conversions. Get some popcorn and go for it.

Pete Stanaitis
---------------
 

Peter Holmander

Subscriber
Age
71
Last Subscription Date
12/23/2019
There is a ton of info regarding powering machine shop equipment on the Practical Machinist website forum.
 

Don Oberholtzer

Sponsor
Last Subscription Date
02/18/2018
Brown &Sharp #9 collet holder and collets are here, installed in the mill, works great. I have 6 collets to start with. I will need to add more for a wider range of sizes and breakage. The collets are different, they must be placed in the nut at a angle so they can snap in place, will take some time to get used to them, may break some. Next item will be the VFD, checking out the videos on Practical Machinist at this time.
 

Lumbersawyer

Registered
I used a 5KW VFD on my 2hp Bridgeport. 220 single phase input, ( 2, 110 volt ) lines like you have on a welder or 220 air compressor. You have to start and stop the motor with the VFD not the switch but otherwise it works fine. My mill is a variable speed mill so I don't use the VFD for speed control but I could. I do use it to reverse and leave my rorary switch alone. I paid like $138 on Ebay for it. Directions were not real clear, but most important was the ramp up and ramp down settings.
 

Peter Holmander

Subscriber
Age
71
Last Subscription Date
12/23/2019
I bought a motor conversion kit from H&W Machine for my J head Bridgeport. It was a little pricey, but works great. Three years later I bought a Hitachi VFD for my Clausing lathe which has a 3hp, 2 speed motor. Very happy with the VFD on the lathe although had trouble programming it to run. Followed the instructions but could not get it to work. Called tech support and they gave me a code to enter and it came right online. If you can get a VFD that will run your mill for 138.00 from ebay, that is probably the way to go.
 

Don Oberholtzer

Sponsor
Last Subscription Date
02/18/2018
My first search for a VFD that has a distribute location in the states. ( AC220v 0.75 KW 1hp Single to three phrase Variable Frequency Drive Inverter.) My mill has a 1/3 hp 3 phrase motor, I use a 3 phrase converter. to power it. I would think the 1/3hp motor would need to be changed to a 1hp. Any info you can provide me to help make the correct VFD purchase would help.
 

Lumbersawyer

Registered
Sounds like a good option, You want the VFD larger than your motor. Mine is a 5hp VFD running a 2hp mill. In my opinion larger is better. You may want a bigger motor in the future and you will already have the drive. My VFD is wired two 110volt wires and one ground. My Bridgeport motor is wired to the low side 220v 3 phase. not the High side 440 volt that would not work. Two 110's gives you 220 three phase out of the VFD.
 

Don Oberholtzer

Sponsor
Last Subscription Date
02/18/2018
A follow up on a VFD for the milling machine. It turns out the best VFD I was able to find was a Lanze / ac Tech 1. This model will be for a 1hp motor and is Manufactured in Indiana. The product list has more info that I don't understand. Next will be to find a local electrician to install. Price was more than some I found on EBay, only difference I was able to discuss my needs with the technical dept. and was worth the extra. Any body have a source to find a manual for the mill?
 
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