Go Back   N-Scale > N-SCALE Forum > Workshop
Register FAQ Members List Members World Map Calendar Downloads Mark Forums Read vBExperience

» Site Navigation
Home page
Featured Layouts
Personal Albums
Model Train Photos
Real Train Photos
Christmas Photo Contest
Big Chat
Hints & Tips
Featured Links
Web Links
User CP
» Awarded Member

Monthly Contest Winner
Title: NSO Engineer
join date: October 22, 2009, 8:08 pm
posts: 5311
» Featured Layout
» Featured P.A.

photo by : Slamdunk

views: 81
» Top Photo Rating

category: Locomotives Engines
photo by : Durin Dog

» Last Classifieds Ad

by james-trainmaster

» Most Downloaded and Viewed Links
N Scale Supply
Custom N Scale Coffee Table Layouts
jpg Track 1
Fifer Hobby Supply LLC
4 N scale
zip Trainz
zip Screensaver Nscale
zip Railroad Tycoon 3
Welcome to the N-Scale.
Welcome to Nscale.org Community!

You are currently viewing our boards as a guest which gives you limited access to our forum and pics features. By joining our free community, you will be able to participate in the discussions, search the forum, send private messages, vote in polls, upload your own pictures and movies to the galleries or your personal album, and access many other special features. Registration is fast, simple and absolutely free, so sign up today! If you have any problems with the registration process or your account login, please contact support.

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 02-14-2011, 09:31 PM   #1
First Line Managers
Senior Member
Points: 40,592, Level: 49
Points: 40,592, Level: 49 Points: 40,592, Level: 49 Points: 40,592, Level: 49
Activity: 0%
Activity: 0% Activity: 0% Activity: 0%
mrmartyman7's Avatar
Activity Longevity
0/20 14/20
Today Posts
0/0 sssss6139
Location: hudson falls

United States

Posts: 6,139
Thanks: 1,098
Thanked 560 Times in 287 Posts
Rep Power: 31 mrmartyman7 is controlling the second NSO trainmrmartyman7 is controlling the second NSO trainmrmartyman7 is controlling the second NSO trainmrmartyman7 is controlling the second NSO trainmrmartyman7 is controlling the second NSO trainmrmartyman7 is controlling the second NSO trainmrmartyman7 is controlling the second NSO trainmrmartyman7 is controlling the second NSO trainmrmartyman7 is controlling the second NSO trainmrmartyman7 is controlling the second NSO train
Awards Showcase
Great Uploader 
Total Awards: 1
Body Mount Coupler drilling Jig

( corrections were made to size of part F the correct size is now listed.)
and also a correction was made in reference to part C , Part F sits on top
of C and I mixed the two up , dislexic. sorry.

I will also repost a new sketch of my Jig.

PART-A make (1) 4" x6" x 3/4 " ---------pine

PART-B make (1) 3" x 4" x 1/8" ------- plexiglass

PART-C make (1) 1-1/2" x 7/8 " x 1/8" -plexiglass

PARTS -D + E make (2) 3/8" X 2-1/4" X 1/8"

PART - F make (1) 1-7/16" x 1-1/8" x 1/8"

you will need :
5/64" drill bit it should fit loosly in the bolster hole.
an old under carriage of a box car .
a 1/32" drill bit for drilling hole for mounting screws.
a tapping bit to cut threads in you under carriage.
a small quick clamp
super glue use sparingly.
I used a sanding block to rough up all surfaces of plexiglass to be glued.

Step 1- Drill 4 corner holes on part B using the 5/64" bit .

Then I also used a larger bit to counter sink the holes,
this will prevent the screw heads from cracking the plexiglass .

Square and center Part B on to part A. screw in place carefully.

Step 2 - Square part C 2-1/2" in onto part B and super glue
( this is the stop block where end of under carriage to be drilled will stop.)

Step 3-Square part D to part C super glue in place.

Step 4-Arrange your under carriage so the bottom is facing upwards and is tightly and squarely against Part D and butted up against Part C.

Clamp the under carriage in place , I also scribed a line along the side of under carriage that is showing
so I would know if anything had moved . So as to use the undercarriage to space parts D + E.

NOTE- keep clamp away from area for glueing part E. use super glue sparingly

Step 5- Super glue Part E in place. under carriage should be removed after these parts are glued and
has a chance to set if you are careful no glue will enter the channel.

Step 6- Drill a 5/64 " hole in part E and through part B but not into part A. secure
part E with a screw , remove clamp and repeat this step to part D.

Step 7- Now with an Exacto knife scrape any glue that may have entered the under carriage channel. a quick couple of scrapes should be all that is needed if you used glue sparingly.

Step 8- Replace the under carriage in the channel butt up against part C
then clamp in place.

Step 9- Use the 5/64" drill bit in a dremel tool and slowly drill through part B useing the bolster as a guide .Don't go too deep only through Part B.

Step 10-Now insert the screw in the bolster hole and secure it into part B it should be tight that is good , now remove the screw and carriage .

Step 11-please see new drawing of part F and remove the material specified , then Drill pilot holes in part F and C.
then Screw Part F to part C.

Again replace under carriage and screw .
Now make a tick mark in the center of part F close to the bolster hole .

score a square line across Part F exactly where the under carriage butts up against part C.

Now measure 3/16 " in from that line towards the bolster hole screw at the intersection of your tick marks, use a small center punch to gently make a dimple for your 1/32" drill bit to follow.

Slowly and squarely drill your plexiglass and under carriage.

Remove the bolster screw and switch carriage ends.
Replace the bolster screw this assures that the carriage does not move.

Drill the other end of the carriage with your 1/32" bit.

Step 12-When cutting the threads in the carriage do the opposite end of the carriage from where the bolster mount screw is , this will give you a free hand to turn the tapping bit .Do not use the tap bit in the drilling hole
in the plexiglas that would widen the hole .

Install your tapping bit into your dremel tool or micro hand drill (recommended) and turn the collet by hand slowly cutting the holes squarely in the under carriage.

Be careful not to wobble the holes in your under carriage, your screws will not fit correctly if this happens,
there is a remedy for this if it does happens.

Try to avoid this mistake.
Believe me I have done this , before I made this jig .

Repeat this on the other end of carriage. You are now ready to mount your couplers.
I also found it handy to use the spacer that comes in the kit
on the top side of carriage where screw pertrudes , I fasten it over the screw
line it up so it is even with the end then lightly super glue in place.

Your New Body Mount Coupler Drilling Jig can be clampted to you work bench or fastend with a few screws
you can also add a few holes in the pine to stand up your tools needed to do your work.

I believe I corrected the mistakes in the instructions and cut list. I sure hope I caught this in time , a new drawing is on it's way. thanks
Attached Images
File Type: jpg BODY MOUNT COUPLER DRILLING JIG 001.jpg (84.8 KB, 159 views)
File Type: jpg jig6.jpg (235.8 KB, 186 views)
File Type: jpg jig7.jpg (242.0 KB, 120 views)

Last edited by mrmartyman7 : 02-16-2011 at 03:50 PM. Reason: add picture
mrmartyman7 is offline   Reply With Quote
The Following 2 Users Say Thank You to mrmartyman7 For This Useful Post:
goodstuff3 (02-15-2011), Hirailtruck (02-15-2011)

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is On
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
How NOT to body mount a coupler dckuk Workshop 22 01-20-2012 07:24 AM
Truck drilling jig Gary60s Workshop 7 08-20-2008 08:10 AM
Body mount couplers? DavidSelim Trains and Rolling Stocks 3 12-14-2004 10:10 PM
Truck mount couplers vs. body mount couplers javacrash All Topics allowed here 7 11-24-2004 09:21 PM

All times are GMT -6. The time now is 05:55 AM.