| Ed,
I totally agree, except were you don't have much other choice, like when plugging the heater port. There isn't enough material to drill & tap to a common size. The 18mm was a good fit, and would have worked out great if we had used a more common pitch, like 1.5. Who would have known that they make taps for non-existent bolt sizes.
Mark On Thu, Dec 9, 2010 at 6:15 AM, Ed Anderson <eanderson@carolina.rr.com> wrote:
I would avoid the "have it made route" if possible.
If for some reason you ever needed a replacement, you'd have to have it made
again. Although, I must admit, I can't imagine what would ruin an 18x2.0
bolt that wouldn't trash the engine - but you never know {:>).
I try to stick with easily available standard sizes if at
all possible for just about anything on the aircraft - so I can run down to
local Auto store when away from home and get the part if needed.
Ed
Sent: Thursday, December 09, 2010 6:35 AM
Subject: [FlyRotary] Re: Source for 18mm x 2.0
Bolt
From the responses received on this it looks like the best route
is to go see the machinist and have one made. Oh, and throw the 18mm x 2.0
tap in the trash.
Mark
On Wed, Dec 8, 2010 at 9:26 PM, Dave <david.staten@gmail.com>
wrote:
Bought something bigger, cut it down...
filed the threads into a taper at the tip and played with it carefully so it
didnt cross thread. Thats what I did with our first attempt at a block, when
we put an aluminum adapter on the oil pump pad for oil return and PSRU
feed. Later gen used the stock oil return fitting with an AN adapter on
it. On 12/8/2010 3:40 PM, Mark Steitle wrote:
Kelly,
Short story is that this is the tap size I had handy that fit the
hole. We're trying to plug the heater port on the rear
housing. Who would have thought that an 18mm x
2.0 would be an oddball size! We found a place that sells
18mm x 2.0 nuts, but they tell us that nobody makes an 18 x 2.0
bolt. That seems hard to believe.
Mark
On Wed, Dec 8, 2010 at 3:26 PM, Kelly Troyer <keltro@att.net> wrote:
Mark,
Try the link below.............What in the world is it
for !!.................There may be other sources but
this is the first one I found.................
Kelly Troyer
"DYKE DELTA JD2" (Eventually)
"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil
Manifold
"TURBONETICS"_TO4E50 Turbo
From: Richard Sohn <res12@fairpoint.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Wed, December 8, 2010 2:57:49
PM
Subject: [FlyRotary]
Re: Source for 18mm x 2.0 Bolt
You will have a hard time for that. M18 x 2.5
is standard and first choice fine is 18 x 1.5 . You may have to get it
made.
Richard Sohn
N2071U
----- Original Message -----
Sent: Wednesday, December 08, 2010
1:49 PM
Subject: [FlyRotary] Source for
18mm x 2.0 Bolt
Anyone know where I can purchase an 18mm x 2.0
bolt?
|