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Lumina Wiper Reamer [message #68265] Thu, 24 December 2009 15:30 Go to next message
philipswanson is currently offline  philipswanson   United States
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Does anyone know the proper reamer to use to fit the original GMC wiper splined sleeve into the Lumina wiper? I notice that some folks use a step drill but I would prefer a tapered reamer to fit the original sleeve.

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Re: Lumina Wiper Reamer [message #68268 is a reply to message #68265] Thu, 24 December 2009 16:38 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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philipswanson wrote on Thu, 24 December 2009 16:30

Does anyone know the proper reamer to use to fit the original GMC wiper splined sleeve into the Lumina wiper? I notice that some folks use a step drill but I would prefer a tapered reamer to fit the original sleeve.

I did look it up. As I recall (not guaranty here at all), it was a 15* reamer and the best I could do for a single tool was about 62$us.

I would might have preferred a tapered reamer also, but the price was a stopper - Plus, what you really want is a taper spline broach. I don't even want to think what babe would set you back. It could be done with an EDM, but machining the electrode to do it is not going to be cheap.

Next part of the story. The cheap step drill from Harbor Freight is just a great answer. The taper is close enough and the ridges inside the resulting hole cause a high enough point load to extrude the arm material into the spline - TaDa - it works great. Use lots of WD-40 as a cutting lube so the tool does not get fouled with adhered material. Be sure to wash it off before painting (brake cleaner works). The arm will get garfed up in drilling and you will want to squirt some flat black on it before you screw it on.

By the way, if you should happen to over shoot a little and the original drive bushing sticks out the top of the arm. Contact me because I have spacers that I made up to go on top of the arm and are clearenced for the protruding spacer. They also are thick enough so you can use the original acorn nut.

Good Luck and Merry Christmas

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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Re: [GMCnet] Lumina Wiper Reamer [message #68269 is a reply to message #68268] Thu, 24 December 2009 16:53 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Matt,

Good idea! However, as I am not familiar with the technical term "garfed up"
could you please define it for me?

Thanks,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426


-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Matt Colie
Sent: Friday, 25 December 2009 9:39 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Lumina Wiper Reamer



philipswanson wrote on Thu, 24 December 2009 16:30
> Does anyone know the proper reamer to use to fit the original GMC wiper
splined sleeve into the Lumina wiper? I notice that some folks use a step
drill but I would prefer a tapered reamer to fit the original sleeve.

I did look it up. As I recall (not guaranty here at all), it was a 15*
reamer and the best I could do for a single tool was about 62$us.

I would might have preferred a tapered reamer also, but the price was a
stopper - Plus, what you really want is a taper spline broach. I don't even
want to think what babe would set you back. It could be done with an EDM,
but machining the electrode to do it is not going to be cheap.

Next part of the story. The cheap step drill from Harbor Freight is just a
great answer. The taper is close enough and the ridges inside the resulting
hole cause a high enough point load to extrude the arm material into the
spline - TaDa - it works great. Use lots of WD-40 as a cutting lube so the
tool does not get fouled with adhered material. Be sure to wash it off
before painting (brake cleaner works). The arm will get garfed up in
drilling and you will want to squirt some flat black on it before you screw
it on.

By the way, if you should happen to over shoot a little and the original
drive bushing sticks out the top of the arm. Contact me because I have
spacers that I made up to go on top of the arm and are clearenced for the
protruding spacer. They also are thick enough so you can use the original
acorn nut.

Good Luck and Merry Christmas

Matt

--
Matt & Mary Colie
'73 Glacier 23 Chaumiere (say show-me-air)
SE Michigan
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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: [GMCnet] Lumina Wiper Reamer [message #68280 is a reply to message #68268] Thu, 24 December 2009 17:56 Go to previous messageGo to next message
GMCWiperMan is currently offline  GMCWiperMan   United States
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Registered: December 2007
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When I've reamed the Lumina arms with a step bit, I'm very careful to
leave the knurled knob about 1/32" proud of the bottom of the base.
After a trial fit on the pivot so I'm sure the flat is in the right
position, I keep the knurled knob in that position until I get the
assembly in a smooth-jawed vice. Pushing the know into the arm that
final little bit cuts the splines and makes the knob difficult to
remove.

JWID,

Ken H.
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Re: [GMCnet] Lumina Wiper Reamer [message #68286 is a reply to message #68269] Thu, 24 December 2009 18:28 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
Robert Mueller wrote on Thu, 24 December 2009 17:53

Matt,

Good idea! However, as I am not familiar with the technical term "garfed up" could you please define it for me?

Thanks,
Rob Mueller

Generally made not pretty. Scratched, chewed and otherwise visibly abused.
Like the side case when you drop a bike.
Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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Re: [GMCnet] Lumina Wiper Reamer [message #68313 is a reply to message #68286] Fri, 25 December 2009 01:05 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Matt,

Thanks! I like it!

Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426


-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Matt Colie
Sent: Friday, 25 December 2009 11:29 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Lumina Wiper Reamer

Generally made not pretty. Scratched, chewed and otherwise visibly abused.

Like the side case when you drop a bike.
Matt


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GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: Lumina Wiper Reamer [message #68315 is a reply to message #68265] Fri, 25 December 2009 07:12 Go to previous messageGo to next message
fred v is currently offline  fred v   United States
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The tapered cones are .693" at the large end. .587" at the small end and .484" in length.
this is from Bob Burkitt

Fred V
'77 Royale RB 455
P'cola, Fl

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Re: Lumina Wiper Reamer [message #68337 is a reply to message #68315] Fri, 25 December 2009 12:06 Go to previous messageGo to next message
philipswanson is currently offline  philipswanson   United States
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Thanks to all that replied. I am going to use Fred's measurements and take them to my machinst to get them reamed. I think this is the best way to go, given the torque that is involved. Another alternative is to weld or otherwise attach the end of the Lumina splined shaft onto the GMC shaft. I don't like the step drill approach, especioally from Harbor Freight. That's one place I try to avoid.

Phil Swanson
77GMCPB

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Re: Lumina Wiper Reamer [message #68340 is a reply to message #68337] Fri, 25 December 2009 13:13 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
philipswanson wrote on Fri, 25 December 2009 13:06

Thanks to all that replied. I am going to use Fred's measurements and take them to my machinst to get them reamed. I think this is the best way to go, given the torque that is involved. Another alternative is to weld or otherwise attach the end of the Lumina splined shaft onto the GMC shaft. I don't like the step drill approach, especioally from Harbor Freight. That's one place I try to avoid.

Phil Swanson
77GMCPB

If you want a couple of Lumina wiper shafts, I've got at least two whole trains on my shop floor about to be scrapped. I will pull out a pair of shafts and ship them to you for the cost of shipping.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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Re: Lumina Wiper Reamer [message #68353 is a reply to message #68265] Fri, 25 December 2009 14:30 Go to previous messageGo to next message
Jim Wagner is currently offline  Jim Wagner   United States
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Registered: February 2004
Location: Brook Park, Oh
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The tapered reamer that I used to open the tapered ball joint hole on the Eldo and Toro knuckles to fit the GMC ball joint worked well for me. I got mine from 'mytoolstore.com'
P/N KDT-2044. Description, KD taper reamer 7/16-1
Jim Wagner
Brook Park, oh

Thanks to all that replied. I am going to use Fred's measurements and take them to my machinst to get them reamed. I think this is the best way to go, given the torque that is involved. Another alternative is to weld or otherwise attach the end of the Lumina splined shaft onto the GMC shaft. I don't like the step drill approach, especioally from Harbor Freight. That's one place I try to avoid.

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Re: Lumina Wiper Reamer [message #68356 is a reply to message #68265] Fri, 25 December 2009 15:57 Go to previous messageGo to next message
ldone is currently offline  ldone   United States
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Member
I used a cone shaped abrasive grinding stone on my variable speed drill. It was the right taper and sacrificed itself for the lumina wipers. Not exactly rocket science but worked. Cost $2 bucks or thereabouts.

76PB

[Updated on: Fri, 25 December 2009 17:10]

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Re: Lumina Wiper Reamer [message #68393 is a reply to message #68337] Sat, 26 December 2009 09:25 Go to previous message
fred v is currently offline  fred v   United States
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Registered: April 2006
Location: pensacola, fl.
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philipswanson wrote on Fri, 25 December 2009 12:06

Thanks to all that replied. I am going to use Fred's measurements and take them to my machinst to get them reamed. I think this is the best way to go, given the torque that is involved. Another alternative is to weld or otherwise attach the end of the Lumina splined shaft onto the GMC shaft. I don't like the step drill approach, especioally from Harbor Freight. That's one place I try to avoid.

Phil Swanson
77GMCPB

ask your friend if he can make a "D bit". these are easy to make from a piece of drill rod. if i get around to changing wiper arms i plan to make a taper bit. i may offer them for sale.

Fred V
'77 Royale RB 455
P'cola, Fl

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