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Author Topic: Ceiling Vent Knob Extension  (Read 328 times)

Heli_av8tor

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Ceiling Vent Knob Extension
« on: December 09, 2017, 06:37:58 PM »
The vent fans in my coach have recessed knobs. With 7 foot ceilings it was all I could do to reach them. Forget it if I was barefooted.

I've seen a number of people have used PVC pipe to make a tool to reach and turn the knob. I didn't want to have to deal with another tool to stow some place.

Here's my solution.

I ordered four of these extensions from Amazon: https://www.amazon.com/gp/product/B000CSN4LC

A single screw has to go through the knob, the extensions, and into the fan mechanism.
The thread is 8-32 which is common enough, but long screws are not. I decided to fabricate the screws. (cost $1.04 for the 12" all-thread rod.)

The original setup used about an 1-1/2" extension to get into the housing. I wanted to add two of the 2" extensions to lower the knob 4".

These pictures detail my process.

Picture 1: the original fan and knob

Picture 2: I used a cutoff tool in the lathe to liberate a phillips head from a screw from my junkbox. I left a 0.075" diameter nib, 1/8" long on the head to provide centering and more surface contact area for the silver brazing.

Picture 3: Drilling a 0.077" hole in the threaded rod for the head.

Picture 4: Silver brazing the head to the threaded rod.

Picture 5: The finished extension stack. The bolt was trimmed flush with the end of the extension (about 5-1/2" after trimming).

Picture 6: The knob mounted on the fan.
Tom & Theresa
2004 Pace Arrow 37C
Workhorse W22, 8.1 Vortec
2014 Honda CR-V Toad, Roadmaster -5 Base and tow bar
SMI Stay and Play Duo Brake system

Rene T

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  • Great being on the right side of the grass
Re: Ceiling Vent Knob Extension
« Reply #1 on: December 09, 2017, 08:22:16 PM »
Nice job Tom. Another thing you could have possibly done was double nut the end of the threaded rod and even used locktite.

You may want to reply to this post also. Members may be following it:

http://www.rvforum.net/SMF_forum/index.php/topic,110521.msg996621.html#msg996621

« Last Edit: December 09, 2017, 08:29:23 PM by Rene T »
Rene & Lucille & co-pilot Buddy
AKA  Pep N Mem
2011 Chevy Duramax 2500 HD 4X4
2011 Montana High Country 343RL
From the Granite State of NH
& Florida Snowbird in Lakeland FL

Heli_av8tor

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  • Posts: 178
Re: Ceiling Vent Knob Extension
« Reply #2 on: December 09, 2017, 08:41:59 PM »
I thought about adding to that thread but decided to start anew.
I just put a link in the other thread to this one.
Thanks Rene,
Tom
Tom & Theresa
2004 Pace Arrow 37C
Workhorse W22, 8.1 Vortec
2014 Honda CR-V Toad, Roadmaster -5 Base and tow bar
SMI Stay and Play Duo Brake system

NY_Dutch

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  • Following the warm weather!
Re: Ceiling Vent Knob Extension
« Reply #3 on: December 09, 2017, 08:48:15 PM »
Another option for folks with limited tools would be to use a cap nut with a screwdriver slot cut into it. A drop of Loctite would serve to keep it in place on the all-thread.
Dutch
2001 GBM Landau 34' Class A
F53 Chassis, Triton V10, TST TPMS
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox base plate

Heli_av8tor

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Re: Ceiling Vent Knob Extension
« Reply #4 on: December 09, 2017, 08:57:13 PM »
That would be simpler solution. But then how would I justify my shop?  ;)
Tom & Theresa
2004 Pace Arrow 37C
Workhorse W22, 8.1 Vortec
2014 Honda CR-V Toad, Roadmaster -5 Base and tow bar
SMI Stay and Play Duo Brake system

NY_Dutch

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  • Posts: 3471
  • Following the warm weather!
Re: Ceiling Vent Knob Extension
« Reply #5 on: December 09, 2017, 09:10:40 PM »
That would be simpler solution. But then how would I justify my shop?  ;)


 :)) ;D
Dutch
2001 GBM Landau 34' Class A
F53 Chassis, Triton V10, TST TPMS
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox base plate

Arch Hoagland

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  • Clovis CA
Re: Ceiling Vent Knob Extension
« Reply #6 on: December 09, 2017, 10:08:25 PM »
I've seen those very high vents and always wondered how you were supposed to operate them. Figured you'd have to keep a stool handy.
2004 Monaco La Palma 36 DBD
W22, 8.1 gas,  Allison 1000 Transmission
7.1 MPG over 80,000 miles

2000 Lexus RX300, 4020lb
U.S. Gear Braking System

Heli_av8tor

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  • Posts: 178
Re: Ceiling Vent Knob Extension
« Reply #7 on: December 09, 2017, 10:46:58 PM »
We have a handy dandy stool. I just hate to get it out.
Tom & Theresa
2004 Pace Arrow 37C
Workhorse W22, 8.1 Vortec
2014 Honda CR-V Toad, Roadmaster -5 Base and tow bar
SMI Stay and Play Duo Brake system

Rene T

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  • Posts: 10140
  • Great being on the right side of the grass
Re: Ceiling Vent Knob Extension
« Reply #8 on: December 10, 2017, 07:57:18 AM »
Another option for folks with limited tools would be to use a cap nut with a screwdriver slot cut into it.

Is that also called a acorn nut?
Rene & Lucille & co-pilot Buddy
AKA  Pep N Mem
2011 Chevy Duramax 2500 HD 4X4
2011 Montana High Country 343RL
From the Granite State of NH
& Florida Snowbird in Lakeland FL

NY_Dutch

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  • Posts: 3471
  • Following the warm weather!
Re: Ceiling Vent Knob Extension
« Reply #9 on: December 10, 2017, 12:13:49 PM »
Is that also called a acorn nut?

Yes it is...
Dutch
2001 GBM Landau 34' Class A
F53 Chassis, Triton V10, TST TPMS
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox base plate

grashley

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  • Western KY for now.
Re: Ceiling Vent Knob Extension
« Reply #10 on: December 10, 2017, 05:09:32 PM »
Tom, I agree with justifying all of the toys in the shop!!!

To make sure I understand:  You started with 12" of 8-32 all thread, added a cap or head for the handle end and sleeves over the all thread to set the length.  I assume your extensions are "keyed" to the handle and the fan?

I love your idea!
Preacher Gordon, DW Debbie
09 Grand Junction 35 TMS  Andersen Ultimate hitch
2013 F350 Lariat LB SRW Supercab diesel 4X4
Nimrod Series 70 popup (sold)
It's not a dumb question if you do not know the answer.

NY_Dutch

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  • Posts: 3471
  • Following the warm weather!
Re: Ceiling Vent Knob Extension
« Reply #11 on: December 10, 2017, 07:15:03 PM »
Gordon, the extensions Tom used are a commercial product made for the purpose:

https://www.amazon.com/gp/product/B000CSN4LC
Dutch
2001 GBM Landau 34' Class A
F53 Chassis, Triton V10, TST TPMS
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox base plate

Heli_av8tor

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  • Posts: 178
Re: Ceiling Vent Knob Extension
« Reply #12 on: December 10, 2017, 09:31:57 PM »
Thanks.
You are both correct.
Tom
Tom & Theresa
2004 Pace Arrow 37C
Workhorse W22, 8.1 Vortec
2014 Honda CR-V Toad, Roadmaster -5 Base and tow bar
SMI Stay and Play Duo Brake system

 

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