PDA

View Full Version : Swapping new chinese power feed for old bridgport, hints?



michigan doug
01-21-2012, 10:34 PM
The original table power feed on my 2 hp bridgeport was DOA. Everything I read about it suggests it would be an expensive and/or time consuming fix. It looks like this:

http://www.ebay.com/itm/REFURBISHED-6F-BRIDGEPORT-POWER-TABLE-FEED-/370523888013?pt=LH_DefaultDomain_0&hash=item5644f1d98d#ht_753wt_1110

I purchased a cheapo import servo power feed. It claims it fits all bridgeports and many others. It's similar to this:

http://www.ebay.com/itm/135-LBS-X-TRAVEL-POWER-FEED-BRIDGEPORT-MILLING-MACHINE-/350500719544?pt=BI_Tool_Work_Holding&hash=item519b788bb8#ht_5615wt_1242

Upon receiving the device, I think I don't have enough parts. The instructions are pretty unclear/obtuse. It physically fits where the old one comes off, but has no "intermediate shaft" to get from the bevel drive gear to the end of the table drive screw. I need a shaft extension of some sort to make this work.

Can I purchase this separately? Is there a kit? Recommendations?

Thanks in advance,

troy

lakeside53
01-21-2012, 10:45 PM
You either need to swap the lead screw to the non-feed type, or, make/buy the extension for the old screw. Go to Servo's web site there is a drawing of the shaft extension, part number 2368.

Here's the "normal" shaft dimentions : http://www.servoproductsco.com/specs/80857_focus-on_models_200_206_225.pdf

This might help somewhat : http://www.servoproductsco.com/specs/0206_OLD_80092.pdf

The shaft extention is show on the last page of this doc : http://www.servoproductsco.com/specs/0206_NEW_80092.pdf



What is wrong with the BP unit? Is it a 6F or 8F?

Unless you have something like a bad motor armature (I had one), it's not all that expensive to fix. And they are very good..

tdkkart
01-21-2012, 10:53 PM
I did the powerfeed install on my Burke Millrite years ago, maybe this will help:
http://www.tdkmotorsports.com/shoppics/burkefeed.html

Lew Hartswick
01-21-2012, 11:41 PM
The original table power feed on my 2 hp bridgeport was DOA. Everything I read about it suggests it would be an expensive and/or time consuming fix. It looks like this:

http://www.ebay.com/itm/REFURBISHED-6F-BRIDGEPORT-POWER-TABLE-FEED-/370523888013?pt=LH_DefaultDomain_0&hash=item5644f1d98d#ht_753wt_1110

I purchased a cheapo import servo power feed. It claims it fits all bridgeports and many others. It's similar to this:

http://www.ebay.com/itm/135-LBS-X-TRAVEL-POWER-FEED-BRIDGEPORT-MILLING-MACHINE-/350500719544?pt=BI_Tool_Work_Holding&hash=item519b788bb8#ht_5615wt_1242

Recommendations?

Thanks in advance,

troy Well both of those are very repairable, I've done so on the ones here
in school.

...lew...

michigan doug
01-22-2012, 10:24 PM
As far as repairing the current unit, I don't want to do component level repairs on a 30 year old board. The motor itself looks pretty bashed up. I don't quite have the skills to substitute a generic pwm board as a hack/update/fix. Plus, I have the new chi-com unit, so I'm going to press on in that direction. I debated for a while though...

Even in non-functional condition, the old one is worth some money, so selling it will pay for part of my new parts.

Thanks again for the info.

Michigan Doug.

lakeside53
01-22-2012, 10:28 PM
ha, the 30 year old stuff is easy! Most just put in a stock replacement card or send the old one to a number of places that fix them for a fixed fee.