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There are Metric grease zerks. Seems they come in sizes like M6, M8 and M10. are similar to NPTF but short in length. are used in applications similar to NPTF. In a nutshell, the actual Zerk fitting is a small nipple that threads into a hole.
How much grease to pump into a Zerk?
You really have no idea of how much grease is between the bearings. A grease gun can produce approx. 10,000 psi pressure. This is more than enough to blow the inner seals in a bearing, or sea lin both bearings, and then blow at least one outer seal...or at least pass through it.
Are all grease Zerks the same size?
To the best of my knowledge, all grease fittings (zerks) have heads of the same size. I do notice that a new grease gun fitting seems to fit somewhat more tightly than my 20 year old one. That may simply be age. As to almost pulling the car off the jack--use jack stands.
What are the different sizes of Grease fittings?
What size thread is used on a zerk grease fitting?
- Thread Series Thread series is the thread "style" of a given grease fitting. There are many different thread series and each has specific attributes. ...
- Thread Size Thread size is the nominal size of pipe that the fitting mates with. ...
- Thread Pitch Thread pitch refers to the distance "peak-to-peak" of each thread. ...
What are the different types of Grease fittings?
Types and sizes of grease fittings
- 1/4”- 28 taper thread fittings. They are suitable for use in automobiles and other kinds of commercial machinery. ...
- 1/4”- 28 straight thread fittings
- Metric grease fittings. ...
- Pin type grease fittings. ...
- 1/8” PTF grease fittings. ...
- 1/4″ PTF grease fittings. ...
Do grease guns come in different sizes?
It's important to make sure you're aware that there are many different types of lubricants and greases for grease guns, as well as various different grease gun cartridge sizes available.
How do I know my Zerk fitting size?
0:132:05The trick to tell grease zerks apart - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou can find one at loc and lube comm. But now let me show you a quick trick to tell the differenceMoreYou can find one at loc and lube comm. But now let me show you a quick trick to tell the difference between the quarter twenty eighth and the eighth inch pipe thread using just a tape measure. Okay.
Are all grease fittings metric?
Metric Grease Fittings are also referred to as Metric Zerk Fittings, Metric Lubrication Fittings, Metric Hydraulic Fittings, and Metric Zerks....Metric Grease Fittings.5 MM Grease Fittings6 MM Grease Fittings6 MM Thread FormingMetric Drive Type FittingsMetric Flush TypeMetric Thread Forming FlushMetric Plugs3 more rows
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.
What size is a standard grease ZERK?
1/4"‑28The most common standard grease zerk 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 grease zerk fitting sizes can be found.
What size thread is a grease fitting?
1/4"‑28SAE‑LT (Society of Automotive Engineers) threads possess SAE pipe thread dimension of 1/4"‑28 taper. Grease zerk fittings in the automotive industry as well as many other industrial machines and standard duty applications use SAE‑LT threads.
Why is it called a grease ZERK?
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.
Are John Deere grease fittings metric?
John Deere Classic 21 Piece Metric Grease Fittings Assortment in 6, 8, and 10 mm thread sizes. 21 assorted metric grease fittings in nine of the most popular styles and sizes are contained in an easy-to-handle, sturdy plastic box with six separately labeled and illustrated compartments.
What is the meaning of ZERK?
(zɜːk ) noun. mechanical engineering. a metal fitting of a mechanical joint into which grease can be inserted as and when lubrication is needed.
What size hole do I drill for a grease fitting?
3/16" Drill hole grease fitting drive fit is a straight fitting with 7.94 mm drive fit For 3/16" drill hole.
Are Zerk fittings tapered?
Taper thread grease fittings are also referred to as taper thread zerk fittings, taper thread grease zerks, or a taper thread zerk. Several sizes available in both Stainless Steel and Monel.
How do you replace a Zerk fitting?
1:328:06Grease Fitting Replacement | AnthonyJ350 - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd then just snug it up. And I hold the wrench near. The socket. I don't come to the end because IMoreAnd then just snug it up. And I hold the wrench near. The socket. I don't come to the end because I don't want to generate a lot of torque. I want less leverage. Just snug.
What is a zerk fitting?
A zerk is available in different threads, lengths, angles, materials, and finishes. A Zerk is commonly referred to as a grease fitting or zerk fitting.
What is a zerk?
Zerk. A zerk is used to lubricate mechanical parts which require grease. A spring-loaded ball inside the zerk compresses when pressure is applied with a grease gun and allows grease to flow through the fitting into the application the zerk is installed.
What happens after pressure from grease gun is released?
After pressure from the grease gun is released the spring-loaded ball check returns to the head of the zerk and stops dirt and other contaminants from entering the zerk as well as preventing grease from escaping through the head of the zerk.
What gauge to use for grease fittings?
Use a female thread gauge to determine the Thread Length in situations where the original grease fitting specification is unknown or missing.
Is hex size metric or imperial?
The Hex size can be either imperial or metric. Because the Hex is primarily for installation it does not require as many size variations and standard Hex sizes will easily match wrench or socket head sizes. Fitting Angle is not necessarily assigned a dimension, but is another primary specification for determining the correct grease fitting size ...
How to tell if a grease gun is a drill chuck?
The head of a grease gun is somewhat similar to a drill chuck; there is a slight amount of adjustability that may adapt to manufacturing tolerances. (Turning the end of the tip counterclockwise when viewed as the greaser tightens. It is possible to be too tight to install or remove without loosening) The zerk head can also wear; my JD front mower has zerks on the spindles below the deck where they are subject to the erosive dust and dirt on my "lawns". Also the zerk heads can be physically damaged so the gun will "fit" but pumps grease out the sides; the zerk has to be replaced.
Can a zerk be damaged?
Also the zerk heads can be physically damaged so the gun will "fit" but pumps grease out the sides; the zerk has to be replaced. If the zerk has wrench flats (like a hex nut) it probably is threaded. If there are no flats it probably was pressed in. Take the old zerk and a magnifier when you go to buy replacements.
Do zerks cut holes in lawn mower spindles?
Pick a handful and some are tighter than others. Many replacement lawn mower spindles with zerks in them actually have no threads cut in the holes. Zerks are just forced in and held by friction of crushed threads.
