Stylus are gonna get hammered !!..

@nsh-usa

8 жыл бұрын

+Simon H (HAREZY-DJ) Those measuring probes hold their own - they have to! Thanks for checking out the video.

I never knew such precision went in to railroad wheels.

@nsh-usa

2 жыл бұрын

We got to keep them running on the tracks safely and efficiently! It is wild (and reassuring) just how precise all of it is. Thanks for watching!

@ricksaunders3889

2 жыл бұрын

@@nsh-usa Thanks for posting the video.

@nsh-usa

2 жыл бұрын

There's more where that came from! Enjoy.

nice video.

@nsh-usa

6 жыл бұрын

Thanks!

Nice!

@nsh-usa

5 жыл бұрын

Thanks for the kind words!

its really nice video , this machine is just for inspection of wheel profile ? wheel is of which material ?

@nsh-usa

6 жыл бұрын

It measures a number of wheel set dimensions: wheel diameter and width, flange thickness and height, wheel rim thickness, deviation of measured wheel profile from standard profile, wheel back-to-back, and plane and radial wheel tread run out. As for the wheel, the one in the video is steel. Thanks for checking out the video!

I have always found it interesting how small a train wheel flange is compared to how huge those trains are. All it takes is one inch of lift of the wheel for whatever reason to cause a major disaster. I'm beginning to think that flange climb is one of the main causes of derailments especially like I said before the flange being so short.

@nsh-usa

7 жыл бұрын

You are right - an improperly trued (or re-profiled) wheel flange can contribute to derailments. Our Product Manager Roger Collen actually wrote a paper on the matter which you can peruse here: smtgroup.com/news/142-wheel-truing-processes-safety-paper

@Bassotronics

7 жыл бұрын

Thank you for your valid info and response. :)

@nsh-usa

7 жыл бұрын

Always glad to help.

Could you good folk comment on the following scenario please? A wheelset running at the front of a locomotive running on the mainline at 78km/hr is allowed a wheel differential diameter of 1.6mm and a differential flange thickness of 3.2mm although the thinner flange (on the smaller diameter wheel) is still above the condemning limit. This has occurred and is not a "what-if". Would you consider this to be an almost absolute recipe for wheel flange climb derailment, particularly at a set of facing points? Thank you for your time.

@nsh-usa

7 жыл бұрын

Although the condition you defined would produce a lateral force which could contribute to the flange thinning, wheel condition is not necessarily the sole indicator or promoter of a wheel climb occurrence. The wheel and rail interface is a very dynamic system with many variables in each component and even the rail bed. We focus on wheel set maintenance activities including the profiling of worn wheels, and are generally not involved in the running performance of wheels and wheel sets. We recommend contacting the folks at AAR or Wheel Rail Interface (interfacejournal.com/) who are focused on the type of subject you are inquiring about. Thanks for the question, Vaughan!

@vaughanwilliamson173

7 жыл бұрын

Thank you very much for your comments.

Wheel is too rough to check profile.... accuracy required in micron or in mm?

@nsh-usa

6 жыл бұрын

That was a test wheel for the video, so yeah, it's pretty rough - it's still going to measure the wheel profile deviation within +/- 0.2 mm to best qualify what maintenance is required for the wheel set. Thanks for watching!

who invented the train wheel ?

@nsh-usa

7 жыл бұрын

Short answer? I could not tell you. Long answer? I'm guessing it could be dug up via Google and/or Wikipedia: en.wikipedia.org/wiki/History_of_rail_transport

How would you compare your product to miniprof wheel?

@nsh-usa

4 жыл бұрын

It's a whole different animal - in addition to measuring the wheel profile, you are also getting the back-to-back, radial and axial runout, and wheel width. Plus there's less chance for operator error - both in terms of the actual measurement as well as transmitting the data to the relevant machine(s) elsewhere in the shop. Thanks for watching!

On 3:23 I see that measured diameter is somewhere near 978 mm. The closes dimensions in inches can be 38.5". 1. What is the nominal diameter of a standard gauge railroad wheel set of a freight car in the US? 2. Do most mainline freight cars have the same wheel set or it differs?

@nsh-usa

3 жыл бұрын

#1 - the most common wheel diameters for US freight railcar are 33, 36, and 38 inches, though 28 in. is out there as well. #2 - yes, the wheel set sizes would be the same or very close to the same. It's worth mentioning that measurement machine shown in the video was for a non-US customer. Thanks for watching!

@dhxl

3 жыл бұрын

@@nsh-usa I see. Thanks for the reply.

What about friction coefficient?

@nsh-usa

4 жыл бұрын

Hi Smit - we only measure the wheel, not the wheel-rail interface. Thanks for watching!

Why do I hear a bang, bang, bang as a train car passes by? Is the wheel chipped? Does this machine detect that, and can the wheel be repaired or replaced? Is there a video on that? Thank you.

@nsh-usa

3 жыл бұрын

The repetitive noise from a vehicle in motion is likely some sort of wheel defect like a flat spot or shelling. They are detected by sound, employees on the train or in the yard, and/or machines made to do such detection. And yes, they can potentially be repaired. Check out this video for two methods of reprofiling wheels: kzread.info/dash/bejne/Y61_ldavmb3LaZs.html - and thanks for watching!

can u plzzz let me know the imensions of train wheel.

@nsh-usa

7 жыл бұрын

I'm not 100% positive, but I'd say the wheel diameter ~978 mm / 38 inches. Hope that helps!

what is the name of this machine?

@nsh-usa

7 жыл бұрын

It's the Simmons WSM-440 Wheel Set Measurement System - you can find out more about it here: smtgroup.com/railway-wheel-shop-equipment/measurement-and-inspection/wheel-set-inspection-machine. Thanks for checking out the video!

is the back to back 1360 mm?

@nsh-usa

7 жыл бұрын

The machine in the video was for a broad gauge customer, so this one is likely 1600 mm.

@nsh-usa

7 жыл бұрын

It is worth mentioning, though, that the machine can be built to accommodate a range of wheel set sizes. Thanks for checking out the video!

@abdulrhmanalenezi1008

7 жыл бұрын

Thanka a lot

I think I am watching a robot movie.

@nsh-usa

6 жыл бұрын

I'm not sure if that is a good thing or a bad thing - but thanks for watching regardless!