hayfield Posted November 23, 2021 Share Posted November 23, 2021 I just obtained some hornblocks from a friend, written on a piece of card is LM4-357/2. I am taking a stab that they are Exactoscale, can anyone confirm what they are please Link to post Share on other sites More sharing options...
brossard Posted November 23, 2021 Share Posted November 23, 2021 I don't know what they are but they look to be pretty complicated. Better off to go with High Level hornblocks. They are the best I have come across and I have tried a lot of makes. John 1 1 1 Link to post Share on other sites More sharing options...
hayfield Posted November 23, 2021 Author Share Posted November 23, 2021 1 hour ago, brossard said: I don't know what they are but they look to be pretty complicated. Better off to go with High Level hornblocks. They are the best I have come across and I have tried a lot of makes. John If they are complicated then they may well be Exactoscale !! Thanks for the advise 1 Link to post Share on other sites More sharing options...
Paul Cram Posted November 23, 2021 Share Posted November 23, 2021 Yes they are exactoscale 1 Link to post Share on other sites More sharing options...
hayfield Posted November 23, 2021 Author Share Posted November 23, 2021 Paul Thanks Link to post Share on other sites More sharing options...
Jol Wilkinson Posted November 23, 2021 Share Posted November 23, 2021 John, they were designed for springing. A coil spring sat inside the threaded spring holder which fitted into the hole in the top of the hornguide. The turned steel "tappet" fitted into the spring and bore onto the top of the horn block/bearing. The springs were, IIRC, sold separately in different strengths. The height of the loco could be adjusted by winding the spring holder up or down. I still have some in my bought but never used box. The concept of springing with coil springs never really caught on and the usual Exactoscale approach of the time, whilst theoretically okay wasn;t really practical. Jol Link to post Share on other sites More sharing options...
hayfield Posted November 23, 2021 Author Share Posted November 23, 2021 Jol As usual Thanks Link to post Share on other sites More sharing options...
ian@stenochs Posted November 24, 2021 Share Posted November 24, 2021 Exactoscale hornblocks and guides are very easy to use. I have quite a few P4 locos with them and bought quite a lot for future projects. However when I changed to 7mm scale I found them very good for springing bogies. The little springs aren't quite strong enough for S7 but I add an extra one on the outside of the screw which lets me adjust the pressure so that the wheels are fully sprung, up and down. Makes for a lovely smooth ride and a joy to watch as wheels ride over bumps but the body just glides! Ian. 1 Link to post Share on other sites More sharing options...
meil Posted November 24, 2021 Share Posted November 24, 2021 Yes they are the Mk1 hornblocks. The hole in the top needs to be tapped 10BA. They also need the appropriate spring that goes in the cups that screw into the hornblock. 1 Link to post Share on other sites More sharing options...
Nick Holliday Posted November 24, 2021 Share Posted November 24, 2021 I've got some of these, in their little grease-proof paper packets, that I bought at a Model Engineering Exhibition at Wembley around 1975. I thought they were actually the original Studiolith products that the Protofour Society helped to sell, but, as I believe they morphed into Exactoscale at some point, I may have got that wrong. Somewhere I've got some old catalogues, but I'm unlikely to unearth them this side of Easter! 1 Link to post Share on other sites More sharing options...
hayfield Posted November 24, 2021 Author Share Posted November 24, 2021 17 hours ago, Jol Wilkinson said: John, they were designed for springing. A coil spring sat inside the threaded spring holder which fitted into the hole in the top of the hornguide. The turned steel "tappet" fitted into the spring and bore onto the top of the horn block/bearing. The springs were, IIRC, sold separately in different strengths. The height of the loco could be adjusted by winding the spring holder up or down. I still have some in my bought but never used box. The concept of springing with coil springs never really caught on and the usual Exactoscale approach of the time, whilst theoretically okay wasn;t really practical. Jol Jol That's why I have these then 1 Link to post Share on other sites More sharing options...
5050 Posted November 26, 2021 Share Posted November 26, 2021 I would have described them as Studiolith. I have a few sets myself. Did Exactoscale continue with the Studiolith part numbers? Link to post Share on other sites More sharing options...
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