What size Tap do I need for a grease ZERK?
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 is a Zerk fitting?
A zerk grease fitting (also known as a grease fitting or grease nipple) patented by Oscar Zerk in 1929 is used in mechanical systems to feed lubricants like lubricating grease into a bearing using a grease gun.
Why is it called a Zerk fitting?
The Zerk design, named after Oscar Zerk, used a fitting much smaller than the Alemite pin-type and did not lock the hose coupler or hand gun and fitting together. Instead, the seal between them was maintained by the pressure of a pushing action when the operator applied the coupler to the fitting.
What thread pitch are Zerk fittings?
1/4″-28 Taper Thread Grease Fittings, 1/4″-28 Zerk Fittings, Taper Thread Grease Fitting.
Are there different ZERK sizes?
Grease fittings come in many different styles. There are two grease fittings that are very common. These are the 1/4″-28 thread and the 1/8″ NPT thread. However, there are other less common grease fitting threads in use.
Do modern cars have grease fittings?
Ray: On modern cars, things like ball joints are all permanently sealed at the factory now. Tom: There are lots of trucks that still have grease fittings on ball joints and tie rods, but we hardly ever see cars that take grease anymore.
Are there metric Zerk fittings?
Metric Grease Fittings are available in both regular and stainless steel. Metric Grease Fittings are also referred to as Metric Zerk Fittings, Metric Lubrication Fittings, Metric Hydraulic Fittings, and Metric Zerks.
What is a grease zerk fitting?
A Zerk fitting is a small metal fitting used in many mechanical systems for the purpose of feeding lubricants such as grease. The grease is fed into the bearing or mechanical system under moderate or high-pressure with the use of a grease gun. Zerk fittings are permanently installed into the bearing by a threaded connection.
What is Zerk fitting this?
Functions. A grease fitting,sometimes called a Zerk fitting,grease nipple,or Alemite fitting is a small metal fixture used on mechanical assemblies.
What can you add Zerks grease fittings to?
Grease fittings, otherwise known as Zerk fittings, allow your suspension parts to be greased . They are commonly found on ball joints, tie rod ends, pitman arms, and sway bar bushings. Greasing these fittings regularly helps keep your suspension quiet and working smoothly.
What thread is a grease zerk?
The included angle of the thread for a 1/4″-28 taper thread grease zerk is 60º. Taper thread grease fittings include a dirt-excluding ball check. Taper thread grease fittings are also referred to as taper thread zerk fittings, taper thread grease zerks, or a taper thread zerk.