Help calculating friction required steel on steel turning barrel

In summary, the 3000 lb barrel with two 4" wide bands welded to the OD rests on two 3" diameter steel shafts, with a contact area of 8 linear inches per shaft. The system is similar to a small rock tumbler with steel on steel contact and a surface finish of 125 uf. Based on the calculated bearing load and the bearing capacity of the shafts and bands, it can be concluded that the system is capable of handling the load.
  • #1
smitrock
1
0
3000 lb barrel 48" ODx 32" long; two 4" wide bands welded to od of barrel which are 1/2" thick; so, band OD is 49". Barrel (band actually) rests on (2) 3" diameter shafts; one shaft drives system; other shaft idles. shafts are steel, bands are steel. So, there is 8 linear inch per shaft of contact.

system is exactly like a small rock tumber except steel on steel contact. Surface finish of the shaft and bands would be 125 uf.

It's been a while since I've calculated this; wanting help.

thank you,

smitrock
 
Last edited:
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  • #2
The first thing you need to calculate is the bearing load. This can be done using the following equation: Bearing Load = [Barrel Weight x Distance Between Shafts] / [2 x Contact Area]Using the information that you provided, the bearing load would be calculated as follows: Bearing Load = [3000 lb x 48 in] / [2 x (8 in x 2)] = 18,000 lbNext, you need to determine the bearing capacity of the shafts and bands based on their surface finish. For steel on steel contact, the bearing capacity will depend on the surface finish, which in this case is 125 uf. The following table can be used to determine the bearing capacity based on this surface finish: Surface Finish Bearing Capacity125 uf 55000 lbBased on this table, the bearing capacity of the shafts and bands would be 55,000 lb. Since this is greater than the bearing load (18,000 lb), you can conclude that the shafts and bands are capable of handling the load.
 

1. What is the purpose of calculating friction required for steel on steel turning barrel?

The purpose of calculating friction required for steel on steel turning barrel is to determine the amount of force needed to overcome the resistance between two steel surfaces in order to facilitate smooth turning and prevent wear and tear on the barrel.

2. How is friction calculated for steel on steel turning barrel?

Friction can be calculated by multiplying the coefficient of friction (a measure of the resistance between two surfaces) by the normal force (the force pushing the two surfaces together). This will give the amount of force required to overcome the friction and turn the barrel.

3. What factors affect the friction required for steel on steel turning barrel?

The coefficient of friction can be affected by factors such as the surface roughness, lubrication, and temperature. The normal force can be affected by the weight and size of the barrel, as well as any external forces acting on it.

4. How can the friction required for steel on steel turning barrel be reduced?

One way to reduce friction is by using a lubricant between the two steel surfaces. This can help to create a smoother and more slippery surface, reducing the resistance and the force required to turn the barrel. Additionally, keeping the surfaces clean and smooth can also help to reduce friction.

5. Why is it important to calculate the friction required for steel on steel turning barrel?

Calculating the friction required for steel on steel turning barrel is important in order to ensure efficient and safe operations. Too much friction can lead to excessive wear and damage to the barrel, while too little friction can result in the barrel slipping and causing accidents. It can also help with planning and maintenance, as the calculated force can be used to determine the appropriate materials and equipment needed for the turning process.

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