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Author Topic: Festool 493566 Guide Bushing Adapter for OF-1400  (Read 987 times)

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Offline Rich Kline

  • Posts: 86
Festool 493566 Guide Bushing Adapter for OF-1400
« on: June 09, 2020, 12:32 PM »
Hi,

I have the Festool 493566 Guide Bushing Adapter for my OF-1400.  After reviewing a number of posts, I still have a question.  I have two different Whiteside guide bushings that are 1 3/16 and fit upside down perfectly.  But pushing the threads through was at first a non-starter.  After just deciding I'm going to REALLY push, I was able to rock them into position.  It then took a dead blow hammer to get them out.  Is this tight tolerance what other people are seeing.  Will the standard Porter Cable be a little looser fit and easier in and out.  I get you need to be tight but the outer collar should handle that part and the threads shouldn't be damaged going through the Festool guide bushing

Am I doing something wrong?

Thanks,
Rich


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Offline Chris Wong

  • Festool Dealer
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  • Posts: 945
  • I make things that challenge me.
    • Flair Woodworks
Re: Festool 493566 Guide Bushing Adapter for OF-1400
« Reply #1 on: June 13, 2020, 01:49 AM »
Assuming you are not putting the parts together at a severe angle, something is wrong with the sizes.  I have never had to use force to get guide rings into the OF 1400 guide bushing adapter.
Chris Wong, http://FlairWoodworks.com
First Festool was a free pencil.
Shipping live-edge cribbage boards around the world since 2010.

Offline Sparktrician

  • Posts: 4123
Re: Festool 493566 Guide Bushing Adapter for OF-1400
« Reply #2 on: June 13, 2020, 08:10 AM »
Given how precisely Whiteside machines their bushings, I'd be suspect of the stamped Festool adapter.  Can you test the bushing with another adapter at the dealership? 
- Willy -

  "Show us a man who never makes a mistake and we will show a man who never makes anything. 
  The capacity for occasional blundering is inseparable from the capacity to bring things to pass."

 - Herman Lincoln Wayland (1830-1898)

Offline xedos

  • Posts: 471
Re: Festool 493566 Guide Bushing Adapter for OF-1400
« Reply #3 on: June 13, 2020, 09:53 AM »
The OF1400 guide bush system is hit or miss.   If yours is a miss it sucks, cause there is no adjustment.

Offline Rich Kline

  • Posts: 86
Re: Festool 493566 Guide Bushing Adapter for OF-1400
« Reply #4 on: June 13, 2020, 10:26 AM »
It's a miss, I bought a set of the Porter Cable bushings and they fit (with some play).  The Whiteside ones were so tight that I need a hammer to get it out.  Dwayne at Slabstitcher double checked and also figured out that some 220 sand paper on the threads of the Whiteside bushing was a solution because he experienced the same problem.

Thanks,
Rich

Offline Cheese

  • Posts: 8344
Re: Festool 493566 Guide Bushing Adapter for OF-1400
« Reply #5 on: June 13, 2020, 11:23 AM »
I just measured mine:

Whiteside inlay bushing 1.1865"/1.1875" OD.

Porter Cable bushing 1.1785"/1.1795" OD.

Festool guide bushing adapter 1.1825"/1.1845" ID.

So, the Whiteside OD is .004" larger than the Festool ID and the Porter Cable OD is .004" smaller than the Festool ID.

Offline Rich Kline

  • Posts: 86
Re: Festool 493566 Guide Bushing Adapter for OF-1400
« Reply #6 on: June 13, 2020, 11:38 AM »
This community rocks.  @Cheese it was described to me as likely a function of metric to imperial rounding or conversion.

Offline Cheese

  • Posts: 8344
Re: Festool 493566 Guide Bushing Adapter for OF-1400
« Reply #7 on: June 13, 2020, 01:11 PM »
This community rocks.  @Cheese it was described to me as likely a function of metric to imperial rounding or conversion.

Ya Rich that could be, however if you pull up the specs for a 1 3/16-20 UN thread, the max major diameter for a class 3A thread is 1.1875", while the max major diameter for a class 2A thread is 1.1861".

The bore on the Festool adapter varies between 1.1845" to 1.1825", so that even a class 2A thread at the max major diameter would be too large.  [eek]

I think Festool probably just grabbed some Porter Cable bushings and designed their adapter around them figuring they were probably the most universally used bushing on the market.
However, Whiteside being a machine shop first and focused on precision, decided to use the specs of a class 3A thread for a nice tight fit.