Hi,
  For the small holes we are wanting to counter sink ... wouldn't it be nice if (WIBNI)
we had a tool that was based on an abrasive technology rather than cutting.  I'm
thinking that a diamond coated counter sink - without any cutter - would do the
jobs that I need very well ... and not run the risk of catching and chipping out
the edge of the hole ... and not wear out (because it is diamond).
                                                                                                       - Jim in the PNW

You might try BenchmarkAbrasives.com

Just yesterday I used a cutting tool that is new to me:  a device that cuts a countersink, and is designed to fit on a drill bit.

It did a superb job.  In this case, I was countersinking 10-32 oval head screws in 1/8" nickel silver, using a drill press.  I had already drilled a clearance hole using a #9 bit.

It's made by Vernon Devices.

Here's a link to their catalog (see page 13):

http://www.vernondevices.com/pdfs/2010VernonDevicesCatalog.pdf

They make these devices that will fit down to a #52 bit, so you can do 0-80 countersinking.

What I liked about these is there was NO chatter, and the countersink was perfectly centered on the hole.  

They are not inexpensive.  But, for this job, I needed perfection; and it delivered.  I expect, over time, I will get other sizes.  One nice thing is the bit is easily sharpened.


Ed

Edward Sutorik

Anyone having doubts about the forces in railroading only need to look at those rails -- bent like they were just pipe cleaners.

Dave Nelson

On Fri, Oct 28, 2022 at 08:09 PM, Nelson Moyer wrote:

I looked for a countersink for 2-56 flat head machine screws, but didn’t find one with a 45° angle.

Point of information, 2-56 flat head screws have an included angle of 82*, or 41* from centerline. Metric screws use a 90* countersink, but that will only give a single line of contact with the steeper head.

I happen to like single flute countersinks as they are less likely to chatter. But I see a problem... if you are using a Dremel drill press that means you are limited to a 1/8" shank, right? Countersinks this small have the shank the same diameter as the cutter diameter, and you need 3/16" for that #2 flat head (.162" to be exact) and any 3/16" countersink I've found has a 3/16" diameter shank. Sorry.

Dennis Storzek


Bob Chaparro wrote:

“I’ve noticed photos of freight cars sometimes show small advertising posters, presumably attached by the shipper.
The photos appear to be pre-World War One.
Were such posters banned or outlawed at some point? And when?”

Here’s a brief overview of the prohibition of advertising on freight cars. All such rules were promulgated by the various railroad associations. The Interstate Commerce Commission had no involvement regarding these rules other than the use of placards which they mandated. If you need more details let me know.

The American Railway Association included Rule 14 within its first Code of Car Service Rules adopted October 24, 1900.

Rule 14: The placing of advertisements or placards of any kind by shippers upon freight cars is prohibited.

The rule was, “recommendatory and not binding upon any member” as per the ARA’s Articles of Organization. As the abuses continued The ARA referred the subject to the 1907 annual meeting of The Master Car Builders’ Association with recommendations that car inspectors be instructed to remove advertisements at all inspection points and charge the cost of the work to the delivering line.

The MCBA’s Arbitration Committee original response was, “Your committee has carefully considered the matter, and is of the opinion that, as it is not a matter which affects the interchange of cars, maintenance of standards or settlement of cars, it is a subject which to rule upon would be entirely outside the providence of this association.”

The following day the secretary of the MCBA addressed the members of the Arbitration Committee and stated, “I wish to say that yesterday afternoon at 4:30 there was a meeting of the Arbitration Committee at which there were representatives of some of the prominent railroads of the United States. They conferred with the Arbitration Committee, and as a result of that conference the Arbitration Committee modified some of its suggestions and those I would like to read it this time:

(1) That the recommendation on page 2 of the printed report of the committee relating to the placing of advertisements on cars be reconsidered.

(2) That rule 40 be changed to read: Damage of any kind to the body of the car due to unfair usage, derailment or accident; also temporary advertisements tacked, glued, pasted or varnished on cars. Delivering company responsible.

Additionally, the following was added to Interchange Rule 106 covering the amounts chargeable to delivering lines. “Removing temporary advertisements tacked on cars, per car, fifty (50) cents. Removing temporary advertisements glued pasted or varnished on cars, per car, one dollar ($1.00)”

The changes to rules 40 and 106 were adopted by the Master Car Builders’ Association on September 1, 1907.

After several changes and expansion of both —Interchange Rule 40 became Rule 36 and Car Service Rule 14 became 12. Both remained throughout the scope of this list so numbered.

Beginning in 1920 with the reorganization of The American Railway Association the Transportation Division reported on the adherence to Car Service Rule 12 and Interchange Rule 36 which were worded exactly the same. Few abuses of the rule were reported during subsequent years and by 1925 the practice of applying advertisements was non existent.

Guy Wilber
Reno, Nevada

I was searching for something else and came across this. This was from a candle company that used beeswax.  

I built and upgraded Northwoods Models, Soo Parts Minneapolis & St. Louis (M&STL)  general service gondola one piece body resin 3D printed kit 22080 I numbered 30357.  One unique feature is the inset on the bottom of the side sheets.  Upgrade includes AB brakes and making sill steps from brass.  If you are interested in the build of resin 3D  printed M&STL gondola, photos and write up of the build process including testing of Badger 3D Prime, a two part Translucent Surface Smoother (striation filler) for 3D printed materials, painting, lettering from Circus City Decals and weathering are now available on my blog I have to share photos and writeup of modeling projects on my Minneapolis & Northland Railroad Company.  If you would like to take a look please do at the following link:

 

http://mnrailroadcab100.blogspot.com/

 

Lester Breuer

--
Tim O'Connor
Sterling, Massachusetts

Great Northern safety film.   Besides GN equipment there’s Southern SU boxcar, NOT&M SS boxcar and more.  

https://youtu.be/BqpayZ2JqlU
--
Charlie Duckworth 
Omaha, Ne.

Advertising Posters On Freight Cars

I’ve noticed photos of freight cars sometimes show small advertising posters, presumably attached by the shipper.

The photos appear to be pre-World War One.

Were such posters banned or outlawed at some point? And when?

Thanks.

Bob Chaparro

Hemet, CA