Free 173 Best Homemade Tools eBook:  
Get 500+ tool plans, full site access, and more.

User Tag List

Results 1 to 5 of 5

Thread: Rail-mounted lathe - photo

  1. #1
    Jon
    Jon is offline Jon has agreed the Seller's Terms of Service
    Administrator
    Supporting Member
    Jon's Avatar
    Join Date
    Jan 2012
    Location
    Colorado, USA
    Posts
    22,485
    Thanks
    7,009
    Thanked 33,426 Times in 9,357 Posts

    173 Best Homemade Tools eBook

  2. The Following 6 Users Say Thank You to Jon For This Useful Post:

    baja (Dec 1, 2019), jimfols (Nov 30, 2019), Miloslav (Nov 30, 2019), rlm98253 (Nov 30, 2019), Saxon Violence (Dec 17, 2019), Seedtick (Nov 30, 2019)

  3. #2
    Supporting Member ncollar's Avatar
    Join Date
    Oct 2012
    Posts
    353
    Thanks
    23
    Thanked 173 Times in 124 Posts
    I take that is the drivers they are cutting??

  4. #3
    Supporting Member Frank S's Avatar
    Join Date
    Aug 2015
    Location
    Peacock TX
    Posts
    8,809
    Thanks
    1,215
    Thanked 7,072 Times in 3,374 Posts

    Frank S's Tools
    Quote Originally Posted by ncollar View Post
    I take that is the drivers they are cutting??
    One would assume so, I have one of the lathes that used to be used for turning the wheels on trolley cars and the subway cars in NYC.
    Never try to tell me it can't be done
    When I have to paint I use KBS products

  5. #4
    Supporting Member
    Join Date
    Nov 2017
    Posts
    251
    Thanks
    16
    Thanked 141 Times in 78 Posts

    Elizabeth Greene's Tools
    How does it work? Jack up the axle, spin it with the engine, and cut like a normal turning operation?

  6. #5

    Join Date
    Mar 2015
    Posts
    32
    Thanks
    0
    Thanked 16 Times in 10 Posts
    The primary purpose of turning the wheels and grinding the rails after they have been put into service is to control noise and vibration - both wayside and in the vehicle. For this purpose it doesn't matter if a wheel is a driver or not and in most 8 wheel transit vehicles, all wheels are drivers anyway.

    As acoustical consultants brought in to advise the CTA (Chicago Transit Authority) on how best to spend a federal grant to control noise some 50 years ago, we advised that grinding the wheels and rails was the most effective use of the money. However, transit management is reluctant to do so because the metal removed dramatically reduces the miles of service obtained from wheels and rails. At the time, rumor had it that the CTA was proud to get a million miles per wheel.

    The last time I was in Chicago (2019) the noise in CTA vehicles and underground stations was dramatically better than in the 1970s when noise was deafening in the subway stations right down to the instant entering trains stopped.

    The phenomenon of rail corrugation (development of ripples in the rail surface) and pitting of wheels and rails (due to fatigue from the high contact pressure between the wheels and rails) has been studied extensively and last I heard (decades ago before I retired) no one had solved the problem.

    One phenomenon Chicago struggled with back then was that rails would develop a very thin film of rust over weekends when some rails were out of service. When service started up on Mondays the rust and water would act as a lubricant between wheels and rails resulting in skids during braking with older controls less sophisticated than we have today. A single skid would cause a flat spot on the wheel - possibly a wheel that had just been ground or turned - resulting in the familiar thump - thump - thump very audible in the vehicle and at the wayside. And the thumping would pummel the rail that may have just been ground.

    The benefit in reducing noise from grinding wheels and rails is dramatic. Going from unground, rough rail onto a section of ground rail is like driving a car from rough pavement onto snow.



    173 Best Homemade Tools eBook
    Last edited by awright; Dec 5, 2019 at 12:57 AM.

  7. The Following 3 Users Say Thank You to awright For This Useful Post:

    Frank S (Dec 5, 2019), Jon (May 2, 2020), Toolmaker51 (Jun 22, 2021)

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •