PV Calculation

PV is a means of measuring the performance capabilities of bearings.

P is expressed as pressure or pounds per square inch on the projected area of the bearing. V is velocity in feet per minute of the wear surface (surface feet per minute).

For sleeve (plain) bearings, the surface speed is .262 (pi ÷12) x RPM x shaft diameter in inches. P is equal to the load on the bearing in pounds divided by the projected area in square inches. For sleeve (plain)bearings, the projected area is the length x the inside diameter of the bearing.

PV is then obtained by multiplying P x V as shown in the following example:

3/4″ shaft @ 341 RPM, 90 lb. total load, bearing length 1″.

V = .262 x RPM x shaft diameter, or .262 x 341 x .750 = 67 sfpm.

P = total load ÷ projected area (area = .750 x 1.0 = .75 sq. in.), or 90 lbs. ÷ .75 = 120 psi.

PV = 120 psi x 67 sfpm = 8040 PV.

Bunting Bearings PV Data Chart

-
P VALUE (MAX)
V VALUE (MAX)
PV VALUE (MAX)
Cast Bronze C93200 Sleeve (Plain) Bearings
4,000
750
75,000
Cast Bronze C93200 Sleeve (Plain) Metric Bearings
4,000
750
75,000
Cast Bronze C93200 Flanged Metric Bearings
4,000
750
75,000
C93200 Solid Bronze Bars
4,000
750
75,000
C93200 Cored Bronze Bars
4,000
750
75,000
C93200 Centrifugal Bronze Bars
4,000
750
75,000
C93200 Bronze Wearplate
4,000
750
75,000
B04 Solid Bronze Bars
4,000
500
75,000
B04 Cored Bronze Bars
4,000
500
75,000
B04 Centrifugal Bronze Bars
4,000
500
75,000
C93700 Solid Bronze Bars
4,000
1,000
85,000
C93700 Cored Bronze Bars
4,000
1,000
85,000
C93700 Centrifugal Bronze Bars
4,000
1,000
85,000
C93800 Solid Bronze Bars
2,500
1,000
75,000
C938 Cored Bronze Bars
2,500
1,000
75,000
C938 Centrifugal Bronze Bars
2,500
1,000
75,000
C90300 Solid Bronze Bars
5,000
250
90,000
C90300 Centrifugal Bronze Bars
5,000
250
90,000
C90700 Solid Bronze Bars
5,000
250
100,000
C90700 Centrifugal Bronze Bars
5,000
250
100,000
C86300 Solid Manganese Bronze Bars
8,000
150
150,000
C86300 Cored Manganese Bronze Bars
8,000
150
150,000
C86300 Centrifugal Manganese Bronze Bars
8,000
150
150,000
C95400 Solid Aluminum Bronze Bars
6,000
250
125,000
C95400 Cored Aluminum Bronze Bars
6,000
250
125,000
C95400 Centrifugal Aluminum Bronze Bars
6,000
250
125,000
C95400 Aluminum Bronze Wearplate
6,000
250
125,000
C95500 Solid Aluminum Bronze Bars
7,000
300
135,000
C95500 Cored Aluminum Bronze Bars
7,000
300
135,000
C95500 Centrifugal Aluminum Bronze Bars
7,000
300
135,000
C95900 Solid Aluminum Bronze Bars
8,000
100
150,000
C95900 Aluminum Bronze Wearplate
8,000
100
150,000
Powdered Metal Sleeve (Plain) Bearings
2,000
1,200
50,000
Powdered Metal Sleeve (Plain) Metric Bearings
2,000
1,200
50,000
Powdered Metal Flanged Bearings
2,000
1,200
50,000
Powdered Metal Flanged Metric Bearings
2,000
1,200
50,000
Powdered Metal Thrust Washers
2,000
1,200
50,000
Powdered Metal Extra Sleeve (Plain) Bearings
2,000
1,200
50,000
Powdered Metal Extra Flanged Bearings
2,000
1,200
50,000
Powdered Metal Extra Thrust Washers
2,000
1,200
50,000
Powdered Metal ECO Sleeve (Plain) Bearings
2,000
1,200
50,000
Powdered Metal ECO Flanged Bearings
2,000
1,200
50,000
Powdered Metal ECO Thrust Washers
2,000
1,200
50,000
Powdered Metal Dri-Plane® Sleeve (Plain) Bearings
1,600
1,000
40,000
Powdered Metal Dri-Plane® Flanged Bearings
1,600
1,000
40,000
Powdered Metal Dri-Plane® Thrust Washers
1,600
1,000
40,000
Powdered Metal BB-16® Sleeve (Plain) Bearings
8,000
35
75,000
Powdered Metal BB-16® Flanged Bearings.
8,000
35
75,000
Powdered Metal BB-16® Thrust Washers
8,000
35
75,000
Powdered Metal Cored Bars
2,000
1,200
50,000
Powdered Metal Solid Bars
2,000
1,200
50,000
Powdered Metal Circular Discs
2,000
1,200
50,000
Powdered Metal Plate
1,600
1,000
40,000
Powdered Metal Iron Copper Solid Bar
4,000
225
35,000
Powdered Metal Iron Copper Cored Bar
4,000
225
35,000
Lube-Align® Platinum Standard
2,000
1,200
50,000
Lube-Align® Platinum 2 Bolt Flanged
2,000
1,200
50,000
Lube-Align® Platinum 3 Bolt Flanged
2,000
1,200
50,000
Lube-Align® Platinum Bore Mounting
2,000
1,200
50,000
Lube-Align® Standard
2,000
1,200
50,000
Lube-Align® 2 Bolt Flanged
2,000
1,200
50,000
Lube-Align® 3 Bolt Flanged
2,000
1,200
50,000
Lube-Align® Bore Mounting
2,000
1,200
50,000
Nylon Sleeve (Plain) Bearings
400
360
3,000
Nylon Flanged Bearings
400
360
3,000
Nylon Thrust Washers
400
360
3,000
PTFE BJ2S Sleeve (Plain) Bearings
1,100
400
30,000
PTFE BJ4S Sleeve (Plain) Bearings
1,100
400
30,000
PTFE BJ5S Sleeve (Plain) Bearings
800
400
20,000
PTFE BJ7S Sleeve (Plain) Bearings
1,050
400
40,000
PTFE BJ2F Flanged Bearings
1,100
400
30,000
PTFE BJ4F Flanged Bearings
1,100
400
30,000
PTFE BJ5F Flanged Bearings
800
400
20,000
PTFE BJ7F Flanged Bearings
1,050
400
40,000
PTFE BJ2T Thrust Washers
1,100
400
30,000
PTFE BJ4T Thrust Washers
1,100
400
30,000
PTFE BJ5T Thrust Washers
800
400
20,000
PTFE BJ2B Solid Bars
1,100
400
30,000
PTFE BJ4B Solid Bars
1,100
400
30,000
PTFE BJ5B Solid Bars
800
400
20,000
PTFE BJ7B Solid Bars
1,050
400
40,000
PTFE BJ Liner Bearings
1,500
400
20,000
PTFE Composite BSF Sleeve (Plain) Bearings
34,300
150
20,000
PTFE Composite BPT Sleeve (Plain) Bearings
20,000
500
34,200
PTFE Composite Thrust Washers .074
15,000
150
10,000
PTFE Composite Thrust Washers .078
15,000
150
10,000
BU Sleeve (Plain) Bearings INCH
36,250
1,000
51,000
BU Sleeve (Plain) Bearings METRIC
36,250
1,000
51,000
VESPEL® Sleeve (Plain) Bearings
4,900
3,000
300,000
VESPEL® Flanged Bearings
4,900
3,000
300,000
VESPEL® Thrust Bearings
4,900
3,000
300,000
All values are based on 72° room temperature and the standard lubricant for the bearing in question. All of the V’s (and therefore the PV’s) can be raised by special lubricating techniques.