Dial Torque wrench
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Easy to adjust and under an hour print torque wrench
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First of all, If intrested in torque wrenches please visit:
https://www.prusaprinters.org/prints/24539-torque-wrench-handles-from-10nm-up-to-30nm
When I first saw the A_R_B toque wrenches design it was very inspiring to me. This design really unlocked lots of things on my mind about what to design for 3D printing.
So, Why a new design? Calibrate those wrenches was a pain for me and I really needed wrenches for M2.5 and M3 for my DIY projects. I've came up with the idea of use a dial so I can just use a marker on the disk at desired torque and calibration is done:
- Apply force on a scale as can be seen in the photo
-Reach desired force
-Use a marker to draw a line. (Or a blade, or, …)
- When using it: Stop tightening when you reach the line.
It has a ratchet function, so you can make 1 line and go to the correct position to do the final tightening or make 8 marks.
The design is very simple and is OK fo small torques. PC Blend was used as I wanted to try the material for future wrenches designs (compact adapters for a standard wrench).
0.7Nm model is for Metric M2.5 screws and 1.1 Nm model for M3. Use this link to see if these torques are good for your aplication:
http://www.online-iso-calculator.com/online-bolt-torque-calculator-metric-vdi-2330/
I couldn't resist to add a PETG wrench to use for nozzles. The design is not ergonomic for 2.5Nm, but it is a valid wrench if you just change the nozzle when needed.