Peppe21
Guest
hello to all
I'm designing a spring system to fit into an experimental apparatus for the university. the spring will be placed externally to a tree that also acts as a guide. Since the spring preload must be adjustable I wanted to fill the shaft to insert a wreath so that it screws and unscrewing it various length of the spring and then the preload. Since I have to find an economic solution (on 10 euro max) for the wreath I have looked at so many catalogs of producers starting from the assumption that making it ad hoc in a workshop would definitely cost me more (I'm wrong, if you have someone to advise me well come!). I needed a m42 thread. I thought I'd put a single wide enough wreath so that you have several threads in hold so that you don't unscrew without a second lock (the spring eventually exercises a maximum force of 600n, while the shaft through another device catches 50,000n of impulsive force). looking at catalogs like this(http://www.gandini.it/www/ghiereros...=it&idsottocat_articoli=1013&idcat_articoli=1) I see that there are irons from 1.50 euros up to 6-7 euros so as price we return. the available threads are however m45 or m40 but I need a m42 because of the encumbrances that leave me no choice. Now I saw that the m42 only make them self-locking(http://www.gandini.it/www/ghiereros...on=frm&ctg=6&languageid=it&idarticolo=gua4215) and this aspect is not that I care very much for the type of task that the wreath must carry out I only reared the price (6 euros) and the fact that there was a thread m42 as I needed. the fact that there is this nylon insert that among other things loses efficiency over time as I read in other posts compromises the screwing of the wreath? or although it has been designed for other purposes, seen that I agree, can I still use it to adjust the preload of the spring by screwing it and unscrewing it repeatedly?
Thank you!
I'm designing a spring system to fit into an experimental apparatus for the university. the spring will be placed externally to a tree that also acts as a guide. Since the spring preload must be adjustable I wanted to fill the shaft to insert a wreath so that it screws and unscrewing it various length of the spring and then the preload. Since I have to find an economic solution (on 10 euro max) for the wreath I have looked at so many catalogs of producers starting from the assumption that making it ad hoc in a workshop would definitely cost me more (I'm wrong, if you have someone to advise me well come!). I needed a m42 thread. I thought I'd put a single wide enough wreath so that you have several threads in hold so that you don't unscrew without a second lock (the spring eventually exercises a maximum force of 600n, while the shaft through another device catches 50,000n of impulsive force). looking at catalogs like this(http://www.gandini.it/www/ghiereros...=it&idsottocat_articoli=1013&idcat_articoli=1) I see that there are irons from 1.50 euros up to 6-7 euros so as price we return. the available threads are however m45 or m40 but I need a m42 because of the encumbrances that leave me no choice. Now I saw that the m42 only make them self-locking(http://www.gandini.it/www/ghiereros...on=frm&ctg=6&languageid=it&idarticolo=gua4215) and this aspect is not that I care very much for the type of task that the wreath must carry out I only reared the price (6 euros) and the fact that there was a thread m42 as I needed. the fact that there is this nylon insert that among other things loses efficiency over time as I read in other posts compromises the screwing of the wreath? or although it has been designed for other purposes, seen that I agree, can I still use it to adjust the preload of the spring by screwing it and unscrewing it repeatedly?
Thank you!