What thread size is a Zerk fitting?
1/4″
The most common standard grease fitting size is 1/4″‑28 SAE‑LT and is often used in automotive applications. They can also be found in agricultural environments as well as other various standard duty applications. For heavy duty applications, larger 1/8″‑27 PTF zerk fittings can be found.
Are all Zerk fittings the same size?
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. It May Be the Fitting on the Gun, But rarely does it (the Job) Come out Satisfactorily, I think some may be a Metric size Zerk or Gun End But I never seem to Have the right Combo.
How do you measure 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 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″ | – |
What size drill and tap for a grease fitting?
Are there 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.
How do you know when a grease fitting is full?
If this is the case, the best tactic is to “feel” the grease into the bearing cavity until slight resistance or back pressure is felt against the trigger, or lever, signaling the bearing cavity is now full.
What size hole do you drill for a 1/2 Tap?
| To Tap This Size Screw Or Bolt: | Use This Drill Bit: | (Closest Fractional:) |
|---|---|---|
| 1/2-13 NC | 27/64″ | 27/64″ |
| 12mm-1.25mm* | 10.9mm | 27/64″ |
| 1/2-20 NF | 29/64″ | 29/64″ |
| 1/2-24 NS | 29/64″ | 29/64″ |