What is shaft packing?

What is shaft packing?

A stuffing box—also called a stuffing gland, packing gland or packing box—forms a seal between the prop shaft and the hole in the hull through which the shaft passes while allowing the shaft to turn freely. It consists of a threaded sleeve and a hollow nut, through which the prop shaft passes.

What size shaft packing do I need?

The most accurate method is to measure the inside diameter of the packing nut and subtract 1.25″ shaft diameter and then divide by 2. FWIW, I have a h40. 5 with a 1.25″ shaft and my packing is 3/16″. I guessed once, bought 1/4″ and after struggling for a while I bought some 3/16″ that went in exactly like it should.

How do you repack a shaft stuffing box?

How to repack a traditional stuffing-box type stern gland

1. Unscrew the cap.
2. Remove the old packing.
3. Wrap new packing several times around the shaft and hold it tight.
4. You can now repack the gland.
5. You can now screw the cap in and tighten it against the locknut.

How much should shaft packing drip?

Check the Packing Start the engine and put it in gear. Let it run for two minutes to see if the box leaks. It should drip a few drops per minute when the shaft is turning, but no drips when in neutral. If it does, give the packing nut another half turn and check again.

What is the purpose of a stuffing box?

A stuffing box or gland package is an assembly which is used to house a gland seal. It is used to prevent leakage of fluid, such as water or steam, between sliding or turning parts of machine elements.

How do you measure shaft packing?

To determine the correct packing size, measure the diameter of the shaft (inside the stuffing box area if possible) and then measure the diameter of the stuffing box (to give the O.D. of the ring). Subtract the I.D. measurement from the O.D. measurement and divide by two. The result is the required size.

What size packing do I need for a 2 shaft?

3/8-inch
With few exceptions, these are specifically matched to the shaft diameter, a 2-inch shaft, for instance, utilizes three 3/8-inch packing while 1-1/2-inch shaft utilizes 1/4-inch packing. Therefore, if you know your shaft diameter, obtaining the correct size packing is straightforward.

Can you change shaft packing in the water?

While packing material is traditionally made of flax, recently it’s being made out of other materials. Perhaps the most popular incorporates Teflon, which increases wear resistance while reducing friction on the shaft. Although it’s possible to change the packing with the boat in the water, we recommend against that.

How much should my stuffing box drip?

When properly adjusted, stuffing boxes are designed to “leak” slightly at two to three drops per minute while the engine is running and the shaft is turning. There should be no dripping when the boat is at rest and the shaft is not spinning.

How much should a stuffing box drip?

two to three drops per minute
When properly adjusted, stuffing boxes are designed to “leak” slightly at two to three drops per minute while the engine is running and the shaft is turning. There should be no dripping when the boat is at rest and the shaft is not spinning.

How many types of stuffing boxes are there?

Basically, the stuffing boxes are classified into four types.

What are the three main parts of a simple stuffing box?

There are three main components to a traditional stuffing box: the stuffing box body, the compression sleeve, and some method of locking the compression sleeve in place.

How do you measure a stuffing box?

What size rudder packing do I need?

NOTE: Rudders use 3/16″ packing – 1 foot does about 3 wraps inside the rudder packing nut – this is usually enough for most rudder applications, however sometimes 4 wraps is needed. If you have any doubt, please order 2 feet.

Can you replace shaft packing in the water?

Should a stuffing box leak?

What size flax is in a stuffing box?

This particular stuffing box is a 1 inch stuffing box and uses three rings 3/16 flax packing. These two surfaces, where the shaft and packing meet, tend to polish each other smooth, and if over tightened, can lead to premature shaft wear or excessive heat.

Who makes the stuffing box hose on top of the log?

The stuffing box hose on top is made by Buck Algonquin. Buck Algonquin a US manufacturer of quality bronze packing boxes and other drive-line components. This Buck Algonquin hose, sized for a 1 3/4″ shaft log, can be purchased from Hamilton Marine for about $9.00 or less.

What are the parts of a stuffing box?

The thin one on the left is the locking nut and the big thick nut on the right is the packing nut. This photo shows the threaded male end of bronze stuffing box and the packing-nut or the female end of the stuffing box separated from the male end. The white PVC pipe on the left is my dummy-mock-up of a vessels fiberglass shaft log.

What type of packing is used on bronze shafts?

The shaft was in perfectly fine condition when packed, and a year later this is what it looked like. The packing used on this shaft was Gore GFO a graphite impregnated packing. If you have a bronze shaft please use extreme caution with graphite impregnated packing materials.