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OKB-TOP

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OKB & TOP series features

Accumulator

Used to reduce pressure spikes in supply and return lines to protect the carrier hydraulic system. The high pressure accumulator is field repairable without removing the breaker from its mountings. Breakers under 4000 lbs. do not require accumulators.

Seals

Cup seals are utilized to secure the flow in the oil and gas chambers.

Nitrogen gas

Cushions piston on the upstroke, eliminating the need for shock absorbers. Increases the piston down stroke force.

Auto-lube

A central grease port with internal grease passage allows you to easily adapt the hammer to most Auto Lube systems.

Working tools

Choice of moil, chisel, blunt and special application tools.

Piston Travel/Long Stroke Design

Travels through one machined piece (no misalignment). The long stroke design reduces shock loads and vibration, which can cause operator fatigue and machine stress. Okada breakers have the highest tolerance to high operational back pressures available without negative operational effects.

Chisel set pin

Heavy dual chisel set pins in many Okada models offer extended service life.

OKB & TOP series specifications

    TOP21LT TOP21H TOP31 TOP35 TOP45B TOP55 TOP60B
Energy class ft-lbs 150 225 375 500 750 1000 1250
Working pressure
range
psi 1300-
1740
1300-
1740
1450-
2030
1735-
2320
1450-
2320
1560-
2280
1735-
2320
Frequency range bpm 550-1000 550-1000 450-1000 1000-1250 800-1100 740-980 730-970
Approx.
operating weight
lbs 195 265 386 550 780 1050 1190
Chisel diameter inches 1.77 1.77 2.24 2.4 2.7 2.9 3.3
Back cap N2 gas
pressure range
psi 142-200 142-200 142-200 114-142 142-171 100-128 156-171
Carrier machine
weight range
US tons 0.8-2.5 1.1-2.5 1.65-4.4 2.2-4.4 4.4-8 5-9 6-10
Piping inner
diameter
inches 1/2 1/2 1/2 1/2 1/2 1/2 3/4
Circuit relief valve
set at
psi 2500 2500 2500 2500 2500 2500 2500
Carrier output
flow range
gpm 4-9 5-9 7-13 13.2-17 17.2-21.5 15.9-21.2 17-23
    TOP90 TOP100A TOP200 TOP205 TOP270
Energy class ft-lbs 2000 2500 3500 4000 5000
Working pressure
range
psi 2000-2620 2030-2620 2030-2620 2030-2620 1850-2420
Frequency range bpm 550-850 550-710 465-625 340-700 360-700
Approx.
operating weight
lbs 1450 2440 3870 4120 5680
Chisel diameter inches 3.9 4.3 4.9 5.3 5.5
Back cap N2 gas
pressure range
psi 114-130 71-156 71-142 28-42 36-43
Built-In
accumulator
N2 gas
psi N/A N/A N/A 870 870
Carrier machine
weight range
US tons 7.7-13.2 11-21 18-24 20-30 22-33
Piping inner
diameter
inches 3/4 3/4 1 1 1
Circuit relief valve
set at
psi 2700 2700 2700 2700 2700
Carrier output
flow range
gpm 22-31 29-35 39.5-53 43-53 47-63
    TOP295 TOP300 TOP400 TOP700
Energy class ft-lbs 7500 7500 10000 15000
Working pressure
range
psi 1850-2420 2030-2620 2030-2620 1990-2630
Frequency range bpm 320-600 280-420 320-400 260-340
Approx.
operating weight
lbs 6530 6650 9350 12150
Chisel diameter inches 5.9 6.1 6.7 7.3
Back cap N2 gas
pressure range
psi 36-43 43-57 40-46 71-78
Built-In
accumulator
N2 gas
psi 870 870 725 725
Carrier machine
weight range
US tons 31-47 31-47 38-53 50-
Piping inner
diameter
inches 1 1 1-1/4 1-1/4
Circuit relief valve
set at
psi 2700 3000 3000 2800
Carrier output
flow range
gpm 63-72 63-72 74-93 79-101

The TOP205, TOP270 and TOP295 have a two-speed feature. Max frequency is while the breaker is in short stroke mode.
Operating weight excludes a backing plate for skid steer configuration.
Please refer to carrier specifications in order to see what combination is best for you.
Specifications are subject to change without notice.

Bracket configurations

Skid-steer loader Universal mount Vertical bracket
Custom engineered single and two-position brackets give excellent results on many popular carriers. We are able to match most manufacturer's quick coupler requirements.
Universal brackets are mounted on a variety of carrier machines using a slip-fit pin kit. These brackets are recommended for rental applications and users who have multiple carrier machines.
Vertical brackets are the most commonly used mounting method. The upper mount bracket can be used together with quick-coupler systems on a variety of carriers.