jef-lemmens

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Join Date:

02-20-2011

Last Activity:

07-25-2017 10:09 AM

Likes Given: 26

42 Likes on 14 Posts 

    ABOUT ME

  • Hulshout Belgi

LATEST ACTIVITY

  • Posted in thread: Plan drawing programs on 05-31-2017 at 11:58 AM
    Through my work I am now working with Inventor , but in the early days I used graphic works 3.0
    , a very easy to understand program , this was still in the time of windows 3.11 and 95, but I
    don't kno...

  • Posted in thread: Project of the Month - May 2017 on 05-17-2017 at 11:40 AM
    Congratulations , well done sir :thumbup:Regards Jef

  • Posted in thread: The Holly Buddy 2,5 cc model diesel engine on 05-14-2017 at 12:24 PM
    If you want , I can provide a crankcase for the Nova , I have made my own castings for it .
    Most of my materials I order in the Netherlands , it is a changing stock according to whether
    he can buy of ...

  • Posted in thread: The Holly Buddy 2,5 cc model diesel engine on 05-13-2017 at 08:45 PM
    Nice work Gerard :thumbup:I use always 42CrMo4 steel for my crankshaftsWhy do you take the
    crankshaft out of the chuck and put it back in again ? Here's some pictures of the crankshaft
    for mine Nova 1...

  • Posted in thread: A 'Mills 1.3' copy on 03-08-2017 at 09:27 PM
    Nicely built, I'm also making a few Mills ( among other things ) of my own castings , if any
    one is interested I can deliver castings for the Mills mk1 and Nova 1The finished engine's are
    built by a f...

  • Posted in thread: Karl-Erik Olsryds 2 cylinder boxer engine. on 02-13-2017 at 01:10 PM
    ¨Hi Jef. Thank for your kind words.The steel is SS2541 equal to 34CrNiMoS6.C 0,3-0,38Si
    0,15-0,40Mn 06´,60-0,80P max 0,025S 0,02-0,035Cr 1,30-1,70Ni 1,30-1,70Mo 0,15-0,30Hardened to
    340-400 Hb.BengtTh...

  • Posted in thread: Karl-Erik Olsryds 2 cylinder boxer engine. on 02-13-2017 at 06:45 AM
    Very nice casting and work !What kind of steel do you use for camshaft and cranckshaft ?
    Regards Jef

  • Posted in thread: 2-Stroke Design: Port Timing Round 2 on 02-06-2017 at 09:18 PM
    What about something like this? I moved the transfer ports to the sides (90 degrees from the
    exhaust ports), and added a boost port to 180 degrees from the exhaust port that opens 10
    degrees before th...

  • Posted in thread: 2-Stroke Design: Port Timing Round 2 on 02-05-2017 at 07:20 PM
    I don't think it will work well with the transfer ports and exhaust ports on the same side ,
    the flow will be disturbed I think :confused:Regards Jef

  • Posted in thread: Lathe Back Stop on 02-04-2017 at 08:38 AM
    Nicely built, I also use sometimes a back stop, but it's something more primitive than yours,
    on the pictures you can see how I do itRegards Jef

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