Yeah, that is the most likely explanation. I got a brass 1/4" NPT and was able to thread it maybe two revs before it got stuck. Have placed an order for a BSPT-threaded plastic elbow from McMaster -- will report back on the fit.
Love the enclosure. Mine is a 8020 frame that interferes with access to the sides and the back of the machine. Is yours suspended on pulleys?Serviced and re-calibrated my CNC Mini-Mill today. Here’s the second pass making a bolt-circle in a test coupon (1/4" Drill)
ThanksIt's official: the thread on the table is BSPT.
This is the item I ordered from McMaster and that fits well: Plastic Barbed Hose Fitting, 90 Degree Elbow Adapter, 10 mm Hose ID, 1/4 BSPT Male, catalog# 5218K341