[Louis Ohland]

Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far left
rear corner.

Anyone with the answer?

[David Billington]

Louis Ohland wrote:
Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far
left rear corner.

Anyone with the answer?
Have you checked the TPI, it's possible what you have is a metric pipe
thread, which is actually a metricated BSP thread, and comes in
straight or tapered depending on use. I can't find my copy of
Machinery's at the moment to look up the details.

Seems to me that the US is being metricated by stealth as when I lived
in the US almost 30 years ago you couldn't find metric whatever in the
local hardware store but now it's mentioned as common place on RCMW.

[Jim Wilkins]

On Feb 24, 6:05*pm, Louis Ohland wrote:
* *Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far left
rear corner.

Anyone with the answer?

Here's a table of hydraulic fitting threads, which it apparently
isn't:
http://fittingsandadapters.com/saej5straigt.html

Is the pitch Metric?

jsw

[Louis Ohland]

I got a partial fit with an 18 TPI leaf, they fit fairly close over the
length, but the depth is wrong, the teeth of the leaf won't go down very
far into the thread.

On 2/24/2011 17:25, David Billington wrote:
Louis Ohland wrote:
Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far
left rear corner.

Anyone with the answer?
Have you checked the TPI, it's possible what you have is a metric pipe
thread, which is actually a metricated BSP thread, and comes in straight
or tapered depending on use. I can't find my copy of Machinery's at the
moment to look up the details.

Seems to me that the US is being metricated by stealth as when I lived
in the US almost 30 years ago you couldn't find metric whatever in the
local hardware store but now it's mentioned as common place on RCMW.

[David Billington]

Louis Ohland wrote:
I got a partial fit with an 18 TPI leaf, they fit fairly close over
the length, but the depth is wrong, the teeth of the leaf won't go
down very far into the thread.

The corresponding BSP thread would be 19 tpi and 55 degree thread form
rather than 60 degree which may explain the mismatch. While not ideal I
think you posted that this was a coolant connection, if that is the case
then all you really need to do is seal it and that can be done with PTFE
tape or one of the many thread sealing compounds available for the
purpose.

On 2/24/2011 17:25, David Billington wrote:
Louis Ohland wrote:
Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far
left rear corner.

Anyone with the answer?
Have you checked the TPI, it's possible what you have is a metric pipe
thread, which is actually a metricated BSP thread, and comes in straight
or tapered depending on use. I can't find my copy of Machinery's at the
moment to look up the details.

Seems to me that the US is being metricated by stealth as when I lived
in the US almost 30 years ago you couldn't find metric whatever in the
local hardware store but now it's mentioned as common place on RCMW.

[Louis Ohland]

Major dia is 15.6mm

Geez, what's wrong with a pint's a pound the word around?

On 2/24/2011 17:43, David Billington wrote:
Louis Ohland wrote:
I got a partial fit with an 18 TPI leaf, they fit fairly close over
the length, but the depth is wrong, the teeth of the leaf won't go
down very far into the thread.

The corresponding BSP thread would be 19 tpi and 55 degree thread form
rather than 60 degree which may explain the mismatch. While not ideal I
think you posted that this was a coolant connection, if that is the case
then all you really need to do is seal it and that can be done with PTFE
tape or one of the many thread sealing compounds available for the purpose.
On 2/24/2011 17:25, David Billington wrote:
Louis Ohland wrote:
Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far
left rear corner.

Anyone with the answer?
Have you checked the TPI, it's possible what you have is a metric pipe
thread, which is actually a metricated BSP thread, and comes in straight
or tapered depending on use. I can't find my copy of Machinery's at the
moment to look up the details.

Seems to me that the US is being metricated by stealth as when I lived
in the US almost 30 years ago you couldn't find metric whatever in the
local hardware store but now it's mentioned as common place on RCMW.

[Jim Wilkins]

On Feb 24, 7:09*pm, Louis Ohland wrote:
Major dia is 15.6mm

Geez, what's wrong with a pint's a pound the word around?

Neither of those measure threads.

If Grizzly doesn't have the fitting, what size would you like it to
be???

jsw

[David Billington]

Louis Ohland wrote:
Major dia is 15.6mm

Geez, what's wrong with a pint's a pound the word around?

Because it isn't, see http://en.wikipedia.org/wiki/Pint


On 2/24/2011 17:43, David Billington wrote:
Louis Ohland wrote:
I got a partial fit with an 18 TPI leaf, they fit fairly close over
the length, but the depth is wrong, the teeth of the leaf won't go
down very far into the thread.

The corresponding BSP thread would be 19 tpi and 55 degree thread form
rather than 60 degree which may explain the mismatch. While not ideal I
think you posted that this was a coolant connection, if that is the case
then all you really need to do is seal it and that can be done with PTFE
tape or one of the many thread sealing compounds available for the
purpose.
On 2/24/2011 17:25, David Billington wrote:
Louis Ohland wrote:
Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far
left rear corner.

Anyone with the answer?
Have you checked the TPI, it's possible what you have is a metric pipe
thread, which is actually a metricated BSP thread, and comes in
straight
or tapered depending on use. I can't find my copy of Machinery's at
the
moment to look up the details.

Seems to me that the US is being metricated by stealth as when I lived
in the US almost 30 years ago you couldn't find metric whatever in the
local hardware store but now it's mentioned as common place on RCMW.

[Louis Ohland]

Close to 16mmx1.5

The US pint is quite close to being spot on.
1.041 lbs of water at 62 °F (16.7 °C)

A different, but equally useful saying for the imperial pint is “A pint
of pure water weighs a pound and a quarter.”

There was a now-obsolete unit of measurement in Scotland known as the
Scottish pint or joug and equal to three imperial pints. It remained in
use until the 19th century, and survived significantly longer than most
of the old Scottish measurements.

Damn, being part Irish is not good enough.

On 2/25/2011 04:10, David Billington wrote:
Louis Ohland wrote:
Major dia is 15.6mm

Geez, what's wrong with a pint's a pound the word around?

Because it isn't, see http://en.wikipedia.org/wiki/Pint


On 2/24/2011 17:43, David Billington wrote:
Louis Ohland wrote:
I got a partial fit with an 18 TPI leaf, they fit fairly close over
the length, but the depth is wrong, the teeth of the leaf won't go
down very far into the thread.

The corresponding BSP thread would be 19 tpi and 55 degree thread form
rather than 60 degree which may explain the mismatch. While not ideal I
think you posted that this was a coolant connection, if that is the case
then all you really need to do is seal it and that can be done with PTFE
tape or one of the many thread sealing compounds available for the
purpose.
On 2/24/2011 17:25, David Billington wrote:
Louis Ohland wrote:
Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far
left rear corner.

Anyone with the answer?
Have you checked the TPI, it's possible what you have is a metric pipe
thread, which is actually a metricated BSP thread, and comes in
straight
or tapered depending on use. I can't find my copy of Machinery's at
the
moment to look up the details.

Seems to me that the US is being metricated by stealth as when I lived
in the US almost 30 years ago you couldn't find metric whatever in the
local hardware store but now it's mentioned as common place on RCMW.

[Larry Jaques[_3_]]

On Fri, 25 Feb 2011 10:10:36 +0000, David Billington
wrote:

Louis Ohland wrote:
Major dia is 15.6mm

Geez, what's wrong with a pint's a pound the word around?

Because it isn't, see http://en.wikipedia.org/wiki/Pint

Oh, but it is. Ask any American. Metric pints aren't real pints.
They're pints-gone-Irish, so they get more ale for their money.
It's a Euro-conspiracy.

--
"Human nature itself is evermore an advocate for liberty.
There is also in human nature a resentment of injury, and
indignation against wrong. A love of truth and a veneration
of virtue. These amiable passions, are the latent spark. If
the people are capable of understanding, seeing and feeling
the differences between true and false, right and wrong,
virtue and vice, to what better principle can the friends of
mankind apply than to the sense of this difference?"
--John Adams

[Pete C.]

Louis Ohland wrote:

Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far left
rear corner.

Anyone with the answer?

Out of curiosity, have you tried emailing Sieg in China? Believe it or
not, the larger reputable Chinese manufacturers like Sieg do have people
who know english and respond to emails.

[Louis Ohland]

On 2/25/2011 08:54, Pete C. wrote:

Louis Ohland wrote:

Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major
diameter is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far left
rear corner.

Anyone with the answer?

Out of curiosity, have you tried emailing Sieg in China? Believe it or
not, the larger reputable Chinese manufacturers like Sieg do have people
who know english and respond to emails.

Never considered that. Let's see...

[Bob La Londe[_5_]]

"Louis Ohland" wrote in message
...
Preparing to run coolant on my X3, I pulled the coolant plug out,
expecting an NPT thread. It isn't. It's a straight thread, Major diameter
is @ .620, pitch diameter is @ .577.

The Grizzly manual does not even show the plug, which is at the far left
rear corner.

Anyone with the answer?

I would be tempted to break out a drill, a tapered ream, and a pipe tap.