Gymnast Report post Posted December 18, 2019 It seems to me, that there should be a supplier of heavier beehive tension springs in Europe or perhaps China or Taiwan. They may be used for Consew 206RB or similar. I found this supplier in USA, and the spring seems heavier by its looks and naming: https://bobbinusa.com/walking-foot/tension-spring-extra-heavy-juki-seiko-consew-walking-foot-sewing-machine/ And this from Australia: https://www.sewingmachinesaustralia.com.au/shop/buy-spare-parts/consew/consew-2202012-05-16-04-19-16/tension-spring-heavy-duty2012-05-16-04-43-42_24.html I have been fooled once by a supplier just stating, that it was a heavy behive spring, but it was infact as a domestic beehive tension spring. I measured the steel thread diameter of domestic sewing machines to be 1.0 to 1.2 mm. I guess the thread diameter of the heavier springs should be 1.4 to 1.6 mm. Quote Share this post Link to post Share on other sites
fredk Report post Posted December 18, 2019 I've bought a few springs from this company (below). Perhaps they have something in their range https://www.eurosprings.co.uk/ Quote Share this post Link to post Share on other sites
Constabulary Report post Posted December 18, 2019 (edited) Like this? https://www.college-sewing.co.uk/b3114-232-000-beehive-spring-heavy-juki-genuine.html Edited December 18, 2019 by Constabulary Quote Share this post Link to post Share on other sites
Constabulary Report post Posted December 18, 2019 BTW - I may have a heavier spring as well if shipping at college sewing is toooo expensive - let me know. I have approx 15+ beehive springs in all kind of strengths, lengths, diameters... But I have to check how much shipping to DK would be. Quote Share this post Link to post Share on other sites
Gymnast Report post Posted December 18, 2019 2 hours ago, fredk said: I've bought a few springs from this company (below). Perhaps they have something in their range https://www.eurosprings.co.uk/ Thanks for this lead. I will try to contact them. I have a local spring manufacturer too, that I have used for something else. Perhaps I should ask him too about this type of spring. 2 hours ago, Constabulary said: Like this? https://www.college-sewing.co.uk/b3114-232-000-beehive-spring-heavy-juki-genuine.html When I look at the picture, the spring seems not that heavy to me. But I should ask them about the steel thread diameter. I managed DIY of two tension springs from the steel of two hooks like these: http://lesamisducircuitdenivelles.be/g/Women's-Inline-Skates/ For me a spring needed bending and adjusting with plyers for 2-3 hours to get an acceptable result. The diameter of the thread I used was 1.55 mm. So I can make it happen again, but I just liked to know if such a heavy spring is a normal replacement part - and it seems not to be. In the tensioners I got, the domestic springs can make a reliable thread tension up to 3 N. Using the spring with 1.55 mm thread, I can get a reliable thread tension up to 9 N. Quote Share this post Link to post Share on other sites
Gymnast Report post Posted December 19, 2019 (edited) I looked at the College Sewing website and found another beehive spring with a picture of a spring that looks more heavy: https://www.college-sewing.co.uk/1422-beehive-tension-spring-seiko-sk-6f-132k6.html I guess the base diameter of the spring to be 18.5 mm or about 23/32 inch. I suppose that all behive springs to sewing machines have that base diameter - am I right? Then the steel thread diameter should be about 1.35 mm based on measurements on the photo. The tension spring is supposed to be used on a Seiko SK-6F or a Singer 132K6. Edited December 19, 2019 by Gymnast Quote Share this post Link to post Share on other sites
