Helm Pumps <H-600 Series>        
Features:
The H-600 Series has been developed with a focus on customer's satisfaction during actual use such as steering sensitivity, smoothness, durability and reliability.
Rigid Shaft Construction - The highly rigid construction of the steering shaft and cylinder block provides smooth and even operation.
Dust Seal - Prevents damage due to debris and and corrosion.
Solid Plunger - Return springs inside each plunger is replaced by a single spring located at the center steering shaft. Hollow sections inside the plunger is no longer needed. This eliminates air pockets within the plunger and results in better and easier bleeding with a more solid feel to the steering.
Balanced Piston - MAROL's newly developed Balanced Piston System along with Marol's unique Distribution Plate design automatically adjusts oil flow based on pressure for the best and smoothest performance.
Smart New Design - Slim design with common mounting hole pattern.
Forged Aluminum Body - Air pockets normarly found in castings is a thing of the past with our forged aluminum body. This eliminates leaks and provides for stronger threads in the ports.

Products:
1. Helm Pump <H-618>
2. Helm Pump <H-623>
3. Helm Pump <H-626>
4. Helm Pump <H-630>
5. Helm Pump <H-633>
6. Helm Pump <H-639>

 

Model H-618 H-623 H-626
Delivery 1.1 cu-in/rev
(18 cu-cm3)
1.4 cu-in/rev
(23 cu-cm3)
1.56 cu-in/rev
(26 cu-cm3)
Max. Pressure 1,000 psi (8 Mpa) 1,000 psi (8 Mpa) 1,000 psi (8 Mpa)
Oil Tank Capacity

21.4 cu-in
(350 cu-in3)

21.4 cu-in
(350 cu-in3)

21.4 cu-in
(350 cu-in3)

Mass 8.82lb (4.0kg) 8.82lb (4.0kg) 8.82lb (4.0kg)
Drawing PDF File

Model H-630 H-633 H-639
Delivery 1.83 cu-in/rev
(30 cu-cm3)
2.0 cu-in/rev
(33 cu-cm3)
2.37 cu-in/rev
(38.5 cu-cm3)
Max. Pressure 1,000 psi (8 Mpa) 1,000 psi (8 Mpa) 1,000 psi (8 Mpa)
Oil Tank Capacity

21.4 cu-in
(350 cu-in3)

21.4 cu-in
(350 cu-in3)

21.4 cu-in
(350 cu-in3)

Mass 8.82lb (4.0kg) 8.82lb (4.0kg) 8.82lb (4.0kg)
Drawing PDF File

Products:
1. Helm Pump <HRP-60>

 

 

 

Model HRP-60
Delivery 3.66 cu-in/rev
(60 cu-cm3)
Max. Pressure 1,150 psi (8 Mpa)
Oil Tank Capacity

36.6 cu-in
(600 cu-in3)

Mass 26.45 lb (12kg)
 
Linear Cylinders
Features:
Balanced and unbalanced cylinders - both with equal steering rotations in both directions
Stainless steel rod with thick chrome plating to ensure durability
Rebuild-able, with easy replacement of seals and O-rings

Products:
1. Cylinder <MSB-21TV-NPT>
2. Cylinder <MSB-26T-18-NPT>
3. Cylinder <MSB-30MX4-NPT>
4. Cylinder <MSB-35-NPT-JB>
5. Cylinder <MS-42-NPT-JB>
6. Cylinder <MS-42L-NPT-JB>
7. Cylinder <MS-55L-NPT-JB>

Specifications:
Model   MSB-21TV-NPT MSB-26T-18-NPT MSB-30MX4-NPT MSB-35-NPT-JB
Cylinder I.D.
0.83 in (21.2 mm) 1.02 in (26 mm) 1.18 in (30 mm) 1.38 in (35 mm)
Rod O.D.   0.59 in (15 mm) 0.59 in (15 mm) 0.63 in (16 mm) 0.79 in (20 mm)
Stroke

 

8.66 in (220 mm)

7.09 in (180 mm)

8.66 in (220 mm)

8.66 in (220 mm)
Oil Quantity Starboard 4.74 cu-in (77.6cm3) 3.89 cu-in
(63.8 cm3)
6.8 cu-in
(111.3 cm3)
8.7 cu-in
(142.5 cm3)
Port 2.37 cu-in (38.8 cm3)
Max. Pressure   1,000 psi
(6.9 MPa)
1,000 psi
(6.9 MPa)
1.000 psi
(6.9 MPa)
1.000 psi
(6.9 MPa)
Force Starboard 545 lbf (2.42 kN) 547 lbf
(2.43 kN)
781 lbf
(4.47 kN)
1004 lbf
(4.47 kN)
Port 271 lbf (1.21 kN)

Model MS-42-NPT-JB MS-42L-NPT-JB MS-55L-NPT-JB
Cylinder I.D. 1.65 in (42 mm) 1.65 in (42 mm) 2.17 in (55 mm)
Rod O.D. 0.87 in (22 mm) 0.87 in (22 mm) 1.1 in (28 mm)
Stroke

8.66 in (220 mm)

11.42 in (290 mm)

10.79 in (274) mm

Oil Quantity 13.5 cu-in (221.2cu-cm) 17.8 cu-in (291.5 cu-in) 29.4 cu-in (482 cu-in)
Max. Pressure 1,000 psi (6.9 MPa) 1,000 psi (6.9 MPa) 1,000 psi (6.9 MPa)
Force 1558 lbf (6.93 kN) 1558 lbf (6.93 kN) 2716 lbf (12.1 kN)
 
C. Rotary Actuators
Features:
Compact design requires little space, and mounting position allows installation flexibility
Sealed, leak-proof oil-filled structure
Dependable performance under unfavorable operating conditions over long periods of time

Products:
1. Rotary Cylinder <MRB-50A>
2. Rotary Cylinder <MRB-63B>
3. Rotary Cylinder <MRB-75A>
4. Rotary Cylinder <MRB-80A>
5. Rotary Cylinder <MRB-100A>

Specifications:
Model MRB-50A MRB-63A MRB-75A MRB-80A MRB-100A
Oil Quantity 4.7 cu-in
(77 cu-cm)
9.4 cu-in
(154 cu-cm)
19.34 cu-in
(317 cu-cm)
24.1 cu-in
(395 cu-cm)
37.65 cu-in
(617 cu-cm)
Max. Pressure 1,000 psi (6.9 MPa)
Torque

3787 lbf-in
(428 N-m)

7572 lbf-in
(856 N-m)

15144 lbf-in
(1711 N-m)

19126 lbf-in
(2161 N-m)

29720 lbf-in
(3358 N-m)