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Torque for the screw tightening
- Thread starter lukics
- Start date
There really isn't a spec for torque on the screws. It's all pretty much just to snug--and that's lighter than you would think so go easy. As we say on a couple of the YouTube streams: "only a couple of ugga duggas" and "righty-tighty, and if righty-tighty becomes righty-loosey you've gone too far."
If you want to get technical, a plain M3 bolt class 10.9 is supposed to be torqued to 1.9 Nm (1.4ft-lb).
jluvs2ride
Member
Tight enough is to subjective, I have big hands and I have a tendency to tighten things a little too much.
I've looked up the torque specs for various size screws and bolts but I don't know if that applies screwing into threaded inserts.
I've looked up the torque specs for various size screws and bolts but I don't know if that applies screwing into threaded inserts.
PGe-10
New member
I have wondered the same thing many times, so thanks for a real answer to his question. Appreciate facts and not everyone's opinion
If your using stainless screws like I am that same M3 in a A4 class is only torqued to 8.9 in lb or 1nm
international.optimas.com
Stainless Steel Fasteners Pre-Load And Tightening Torques
Pre-Load and tightening torques for A1, A2 and A4 stainless steel fasteners.
international.optimas.com
Akio
Member
A while ago I stumbled on this: https://www.sliceengineering.com/co...essories/products/nozzle-torque-wrench-1-5-nm
Apparently they use 1.5NM for their hotend nozzle combinations, but it might be different for nozzles or heater blocks made from different materials. It is the only 3d printing company though that I have seen to communicate an actual value.
Apparently they use 1.5NM for their hotend nozzle combinations, but it might be different for nozzles or heater blocks made from different materials. It is the only 3d printing company though that I have seen to communicate an actual value.
Yeah there are lots of printable versions of nozzle changers that use about the same tq value.
3dCase
Well-known member
Those torques from tables are in particular types of material as well (as they also mention but then forget to state which specific one is for the table), not just related to the class of the bolt. So torque in steel is as per most tables, torque in aluminium is appreciably lower and in plastic it is lower still. The torque for an insert is therefore not the torque for that class of bolt in steel but for plastic, since the lowest strength will yield first, which in the case of the insert is the plastic. If I find specific tables for different materials I will try to post them, but I am going on holiday kind of as of tomorrow......so don't hold your breath!
3dCase
Well-known member
Ok so I found one but it is imperial so you can use it but you have to convert both size and the torque before you can use it for your metric stuff.
Instantly obvious is the huge differences between stainless and nylon. It is very important to appreciate, and to adapt your approach to reflect this.
Torque Table Standard Bolt Sizes SAE
The following suggested tightening torques provide an excellent starting point for determining torque requirements. Remember, you may need to vary these numbers somewhat based on the individual joint or the amount of fastener lubrication.
www.engineersedge.com
Instantly obvious is the huge differences between stainless and nylon. It is very important to appreciate, and to adapt your approach to reflect this.
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