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Crane Bumpers are available in Solid Cast or Steel Plate base designs or with a single bolt. Solid Cast Bumpers are a single piece molded type, with steel screen reinforcements in the base plate. Available in 2" to 12" Dia. Steel Base designs have a steel base plate with 4 bolt holes, bonded to the cylindrical bumper. They are available from 2" Dia. up to 12" Dia. Econo Bumpers are available with a bolt molded to the base. All Crane Bumpers comply with C.M.A.A & O.S.H.A. requirements.
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High Impact Strength
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High Load Bearing Capacity
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Outstanding Abrasion Resistance
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Excellent Oil, Grease & Ozone Resistance.
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DESIGN FEATURES:
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PPC Crane bumpers comply with OSHA and C.M.A.A specifications for Bridge and Trolley bumpers.
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Bridge bumpers are designed to stop the bridge at an average deceleration rate of less than 3 ft/s/s when traveling at 20% of the rated load speed.
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Trolley bumpers are designed to stop the trolley at an average deceleration rate of less than 4.7 ft/s/s when traveling at one third the rated load speed.
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The conical cross section of the bumper enables higher load bearing capacity (approx 10% more) than the cylindrical designs.
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Because of the conical shape, the bumper exerts higher resistance as the bumper is compressed.
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The impact surface and the deflecting body of the bumper have molded surface finishes, thus improving the cut resistance by as much as 300% compared to open cast surfaces.
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SAFETY FEATURES:
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Safety cable hooks are molded in the bumpers in compliance with OSHA standard 1910.179 (iii). These safety hooks are located outside the deflecting body of the bumper.
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PPC's crane bumpers are less than half the weight of the bumpers with steel mounting plates. Thus they are safer and easier to handle.
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The single piece molded design is safer because there is no possibility of the bumper portion separating from the mounting plate.
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PPC crane bumpers are made of the best available polyurethane elastomers. These are tough, durable and safe over a wide range of operating temperatures (-60ºF to +225ºF).
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PPC Crane bumpers are made in a bright red color so as to enhance visual inspection.
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Advantages of P.P.C. "Poly-Pro" Crane Bumpers:
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POLY-PRO Crane Bumpers are made of High Performance compounds that yield resilient and durable bumpers of unmatched advantages.
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POLY-PRO Crane Bumpers are available in 3 basic design groups. "P" series are our own unique design, comprising a uni-cast bumper and base portion, with 4 holes for anchoring bolts. "S" series have Polyurethane bumpers molded to steel base plates with 4 holes for anchoring bolts. "B" series are our economical series, with one bolt molded integral with the bumper for ease of mounting.
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POLY-PRO Crane Bumpers are produced to exacting standards, using the best performance polyurethane elastomers, assuring you of long SERVICE LIFE, smooth & quiet PERFORMANCE, and MAINTENANCE FREE OPERATION, even in dirty and hostile environments.
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POLY-PRO Crane Bumpers can be visually inspected from the floor level and since they do not have any moving parts, or any enclosed parts, no failures or malfunctions will go undetected.
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POLY-PRO Crane Bumpers are light-weight, and are designed for ease of installation and handling.
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POLY-PRO Crane Bumpers can be used in temperature ranges of -60° F (-50° C) to 225° F (107° C), and are not effected by oil, grease, humidity, dirty environments, aging or temperature changes.
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POLY-PRO Crane Bumpers are much better than rubber, wood, spring or hydraulic bumpers offering unmatched benefits and advantages.
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"P-Series" Crane Bumpers
Poly-Pro "P" series Crane bumpers are made of single piece molded Polyurethane bumper body with integrally molded base, with reinforcing expanded metal screen(s) molded inside the base. The 4 molded mounting bolt holes in the base has bonded steel washers. This design eliminates the possibility of the bumper portion separating from the mounting base plate, such as in steel base plate designs. This design bumper is much lighter than the steel base plate design, of a similar size.
P.P.C
Part
Number |
BUMPER |
MOUNTING BASE |
BUMPER
Volume
Cu. In. |
BUMPER CAPACITY
Kinetic Energy during impact
Ft-lb./In. |
Weight of
Bumper,
Pounds |
Top
Dia.
D1 |
Base
Dia.
D2 |
Height
H |
Outside
Size
(sq.)
X |
Bolt
Centers
Y |
Bolt
Size
B |
Thick
ness
T |
No. of
Reinforcing
Screens |
| CB-P2 |
2" |
21/4" |
3" |
5" |
3" |
1/2" |
3/8" |
1 |
11 |
310 |
1 |
| CB-P3 |
3" |
33/8" |
41/2" |
61/2" |
41/2" |
1/2" |
1/2" |
2 |
36 |
1000 |
3 |
| CB-P4 |
4" |
43/8" |
6" |
8" |
6" |
1/2" |
1/2" |
2 |
83 |
2300 |
6 |
| CB-P5 |
5" |
51/2" |
71/2" |
10" |
71/2" |
1/2" |
1/2" |
2 |
163 |
4550 |
11 |
| CB-P6 |
6" |
61/2" |
9" |
12" |
9" |
3/4" |
3/4" |
3 |
276 |
7700 |
18 |
| CB-P7 |
7" |
75/8" |
101/2" |
131/2" |
101/2" |
3/4" |
3/4" |
3 |
441 |
12300 |
27 |
| CB-P8 |
8" |
83/4" |
12" |
15" |
12" |
7/8" |
7/8" |
3 |
661 |
18500 |
40 |
| CB-P9 |
9" |
97/8" |
131/2" |
16" |
13" |
7/8" |
7/8" |
3 |
945 |
26500 |
52 |
| CB-P10 |
10" |
11" |
15" |
19" |
15" |
7/8" |
1" |
4 |
1300 |
36400 |
72 |
| CB-P11 |
11" |
121/8" |
161/2" |
20" |
16" |
1" |
1" |
4 |
1735 |
48500 |
95 |
| CB-P12 |
12" |
131/4" |
18" |
22" |
18" |
1" |
11/8" |
4 |
2255 |
63100 |
125 |
Other Sizes available on request
"S-Series" Crane Bumpers
"Poly-Pro" 'S" Series Crane Bumpers are made of a high performance polyurethane elastomer bumper body that is cylindrical shaped, and is bonded perpendicular to a square, steel base plate with 4 mounting holes. The bumper has an integrally molded 'safety-hook', designed for safety cable anchoring.
P.P.C
Part
Number |
BUMPER |
MOUNTING BASE |
BUMPER
Volume
Cu. In. |
BUMPER CAPACITY
Kinetic Energy during impact
Ft-lb./In. |
Weight of
Bumper,
Pounds |
Top
Dia.
D1 |
Height
H |
Outside
Size
(sq.)
X |
Bolt
Centers
Y |
Bolt
Size
B |
Thick
ness
T |
No. of
Reinf.
Screens |
| CB-S2 |
2" |
3" |
5" |
3" |
1/2" |
3/8" |
1 |
11 |
310 |
4 |
| CB-S3 |
3" |
41/2" |
61/2" |
41/2" |
1/2" |
1/2" |
2 |
36 |
1000 |
9 |
| CB-S4 |
4" |
6" |
8" |
6" |
1/2" |
1/2" |
2 |
83 |
2300 |
15 |
| CB-S5 |
5" |
71/2" |
10" |
71/2" |
1/2" |
1/2" |
2 |
163 |
4550 |
25 |
| CB-S6 |
6" |
9" |
12" |
9" |
3/4" |
3/4" |
3 |
276 |
7700 |
49 |
| CB-S7 |
7" |
101/2" |
131/2" |
101/2" |
3/4" |
3/4" |
3 |
441 |
12300 |
66 |
| CB-S8 |
8" |
12" |
15" |
12" |
7/8" |
7/8" |
3 |
661 |
18500 |
95 |
| CB-S9 |
9" |
131/2" |
16" |
13" |
7/8" |
7/8" |
3 |
945 |
26500 |
115 |
| CB-S10 |
10" |
15" |
19" |
15" |
7/8" |
1" |
4 |
1300 |
36400 |
173 |
| CB-S11 |
11" |
161/2" |
20" |
16" |
1" |
1" |
4 |
1735 |
48500 |
210 |
| CB-S12 |
12" |
18" |
22" |
18" |
1" |
11/8" |
4 |
2255 |
63100 |
280 |
Other Sizes available on request
"B-Series" Crane Bumpers
"Poly-Pro" "B" Series Crane Bumpers are made of a high performance Polyurethane elastomer bumper body that is cylindrical shaped, with a washer and bolt molded on one end, and has a safety cable hook molded to the body.
| P.P.C Part Number |
BUMPER |
MOUNTING BOLT |
| Dia. |
Height |
Size |
Length |
| CB-B2 |
2" |
3" |
1/2"-3 |
2" |
| CB-B3 |
3" |
41/2" |
1/2"-3 |
2" |
| CB-B4 |
4" |
6" |
5/8"-11 |
21/2" |
| CB-B5 |
5" |
71/2" |
3/4"-10 |
3" |
| CB-B6 |
6" |
9" |
3/4"-10 |
3" |
Advantages of "B" Series Crane Bumpers:
Single bolt design bumpers are economical and easy to install.
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