Since this subject came up, and I have a small collection of other hot-ends, I decided to use a set of pin gauges and measure the nozzle orifice to see what the size really is. Since my pin gauges are in SAE, the closest I can get is to one thousandth of an inch. In order to measure them, I started with a pin gauge that was a little smaller than the hole and incrementally worked my way up through the pin gauges until I found one that didn't fit. So, the size that I have listed is the last size that actually fit the hole. It is entirely possible that the orifice is slightly bigger than that which is listed; but, it is certainly smaller than the next size pin gauge. So, these measurements are giving the hot-end orifice the "benefit of the doubt", so to speak.
All hot-ends listed were purchased with a 0.50mm orifice specified.
- Budaschnozzle (Lulzbot)....0.021
- J-Head Mk IV-B (Reifsnyder Precision Works)....0.019
- MakerBot Mk V (MakerBot)....0.019
- MakerGear (MakerGear)....0.019
- ParCan 2 (ParCan)....0.019
The metric to SAE conversion is as follows:
- 0.01969 0.50mm
- 0.02008 0.51mm
- 0.02047 0.52mm
- 0.02087 0.53mm
- 0.02126 0.54mm
- 0.02165 0.55mm
- 0.02205 0.56mm
Please note that the listed hot-ends may be from other companies and/or individuals and they are in no way related to and/or endorsed these measurements.