What size hole do I drill for a grease fitting?
Grease Fitting Thread Size
| Fitting Thread Size | Tap Drill Selection For Standard Thread Fittings | Drill Size Selection for Spin Drive Fittings |
|---|---|---|
| 1/4″-28 | #3 (for soft metal use #5) | “A” – .234″ Dia. |
| 5/16″-32 | 9/32″ (for soft metal use “J”) | – |
| 1/8″ Pipe | 11/32″ (for soft metal use “R”) | 3/8 – .375″ Dia.* |
| 1/4″ Pipe | 7/16″ | – |
How do I install a new grease fitting?
Place the shank of the grease fitting into the hole, ensuring it is perpendicular to the mating component. Tap the protruding end of the driving tool with a hammer to drive the fitting into the desired hole. Continue driving the grease fitting into the hole until it is seated securely in place.
Why does my grease gun not work?
The most common cause is an air lock. This can be fixed by continuously pumping to see if the air will pump out. Secondly by unscrewing the barrel one turn and continuously pumping, then tightening the barrel when the grease pumps.
How do you size a grease fitting?
Measurement #2 – Thread Pitch The best way to determine thread pitch of a grease fitting is to compare the threads to something with a known thread. A thread pitch gauge is the ideal tool for this but you can also compare the grease fitting threads to a known bolt thread, pipe thread, or another grease fitting.
What are the different types of grease fittings?
There are three major thread types for grease fittings: metric, taper or parallel, and unified. M5, M6, M7, M8, and M10 are common metric threads. British standard pipe (BSP), pipe thread fine (PTF), and national pipe thread fine (NPTF) fittings use tapered or parallel threads.
Are grease fittings self tapping?
Features: Self-Tapping Grease Fittings are also known as Thread Forming or Spin Drive Grease Fittings. They have special tapered drive threads for fast and economical production line installation. Their special hardened threads allow the fitting to be screwed into a drilled hole, eliminating the need to tap.
Can you over grease a ball joint?
DO NOT CONTINUE GREASING ONCE YOU SEE THE BOOT SWELL. The seal that holds that grease in the ball joint can be compromised if too much pressure is applied. If this happens you will be replacing that part sooner than later.
Are Zerk fittings universal?
Zerk Fittings may be all the same But I have Had Many that would either NOT Go On or had a Heck of a Time Getting it Off.
Why does my grease gun get stuck in the fitting?
Grease guns get stuck on fittings due to clogged zerk fittings which don’t let the grease pass through and cause a pressure build up that prevents them from releasing. So to get it unstuck unscrews the hose or hardline from the gun which will release the pressure and allow it to come off.