Annoying squeaking sound
Annoying squeaking sound
(OP)
Hi guys,
I designed a friction-based blocking system. The system basically consists of a shoulder bolt rubbing in a slotted plastic piece. The plastic is Nylatron GSM, and the shoulder bolt is standard steel.
The system works well, except after a certain amount of cycles, there's a very annoying squeaking sound coming from the friction between the plastic slot and the shoulder bolt. I put Jig-A-Loo on the shoulder bolt and the squeaking disappeared, but only for some time. The problem is that I can't tell the customers to put jig-a-loo in there every time it squeaks! I have to use food-grade grease, but I don't want to cause it would decrease the friction force a lot plus it would gather dust...
I cannot change the plastic and ran out of ideas for stopping this squeaking.
Does anyone of you guys could help me?
Thanks a lot
I designed a friction-based blocking system. The system basically consists of a shoulder bolt rubbing in a slotted plastic piece. The plastic is Nylatron GSM, and the shoulder bolt is standard steel.
The system works well, except after a certain amount of cycles, there's a very annoying squeaking sound coming from the friction between the plastic slot and the shoulder bolt. I put Jig-A-Loo on the shoulder bolt and the squeaking disappeared, but only for some time. The problem is that I can't tell the customers to put jig-a-loo in there every time it squeaks! I have to use food-grade grease, but I don't want to cause it would decrease the friction force a lot plus it would gather dust...
I cannot change the plastic and ran out of ideas for stopping this squeaking.
Does anyone of you guys could help me?
Thanks a lot





RE: Annoying squeaking sound
What is a Jig-A-Loo.
Could the nylon simply be drying out. What is the environment.
Ia dust from wear collecting.
Is there a repeated sterilization process that might be degrading the nylon.
Can the friction be controlled by a longer bolt with a spring between the head of the bolt and a big washer bearing on the nylon.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Annoying squeaking sound
Jigaloo is a spray on lubricant.
RE: Annoying squeaking sound
You may want to try using a dry lubricant like WS2 in lieu of the MoS2. If you have very many to do there is a process where WS@ can be impregnated in to plastic.
You also may want to try Graphite. In the same vain You could also consider Bron Nitride.
RE: Annoying squeaking sound
Chris DeArmitt PhD FRSC CChem
RE: Annoying squeaking sound
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Annoying squeaking sound
Chris DeArmitt PhD FRSC CChem
RE: Annoying squeaking sound
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask