4mm P4: BB wheel gauge

Discussion in 'EM/S4 & S scale' started by jonte, 7 March 2020.

  1. jonte

    jonte Western Thunderer

    Dear Fellow Westerners

    Does anybody know the measurement of the wheel back-to-back gauge supplied by the Scalefour Society?

    I’ve noticed that DCC Concepts have one in their range set at 17.75 mm.

    Any assistance greatly appreciated.

    Many thanks,

  2. richard_t

    richard_t Western Thunderer


    Mines 17.7mm (actually 17.69mm), compared to an S4 back to back guage given to me by Ray Hammond which is 17.84mm.

    Hope that helps

    PS: The leaflet in the box of the P4 gauge states BB max: 17.75 17.67 min
    jonte likes this.
  3. jonte

    jonte Western Thunderer

    Yes it does, Richard, so many thanks.

    Looks like both gauges are within the set limits.

    Many thanks also for your prompt reply.

    Best wishes,

    richard_t likes this.
  4. victorianman

    victorianman Western Thunderer

    If you obtain the GW Models back-to-back gauge, you can set it to whatever you want, within limits. I seem to remember that there was recently a discussion in S4 News about the best b-to-b measurement, so might be worth a look.
    jonte likes this.
  5. jonte

    jonte Western Thunderer

    Kind of you to give me the heads-up VM. Thank you.

    I’ll take a look.

    I have a GW wheel-puller somewhere or other still in its unopened packet. Mind you, it’ll come in handy at some stage ;)

    Which reminds me, I need to order his quartering tool!

    Best wishes,

  6. Lyndhurstman

    Lyndhurstman Western Thunderer

    Hello @jonte
    I have one I can send you (I've managed to acquire 3 in my extended dalliance with all things P4-ish..). No cost.


    jonte likes this.
  7. jonte

    jonte Western Thunderer

    Hiya Jan

    Most kind.

    PM sent.

    Thank you.