For Rexroth A4FO28 axial piston hydraulic pump
- Product Details
- Product Model
- FAQ
The A4FO28 is a variable displacement axial piston pump from Bosch Rexroth, designed for open circuit applications. It features a swashplate design where pistons reciprocate within cylinder bores, driven by a rotating shaft. Key characteristics include a displacement of 28 cm³/rev and a maximum pressure rating typically up to 350-400 bar. The primary control is a pressure compensator, which automatically adjusts the swashplate angle to vary pump flow based on system demand, maintaining a preset pressure. This makes it highly efficient for systems requiring constant pressure with variable flow. The pump is known for its compact, robust construction, quiet operation, and high volumetric efficiency. It is commonly used in mobile machinery (excavators, cranes), industrial hydraulics, and material handling equipment where reliable, pressure-compensated flow is essential.
Specifications
| Size | NG | Unit | 22 | 28 | 71 | 125 | 180 | 250/H | 500/H | |
| Displacement, geometric, per revolution | Vg | cm³ | 22 | 28 | 71 | 125 | 180 | 250 | 500 | |
| Maximum rotational speed | nnom | rpm | 3600 | 3000 | 2200 | 1800 | 1800 | 1500/1900 | 1320/1500 | |
| nmax | rpm | 4500 | 3750 | 2700 | 2200 | 2100 | 1800/2100 | 1600/1800 | ||
| Flow at Vg and nnom | qv | l/min | 79 | 84 | 156 | 225 | 324 | 375/475 | 660/750 | |
| Power at Vg, nnom and Δp = 400 bar | P | kW | 53 | 56 | 91 | 131 | 189 | 219/277 | 385/438 | |
| Torque at Vg and Δp = 400 bar | T | Nm | 140 | 178 | 396 | 696 | 1003 | 1393 | 2785 | |
| Rotary stiffness drive shaft | Shaft and S | c | kNm/rad | 29.9 | 29.9 | - | - | - | - | - |
| Shaft and P | c | kNm/rad | - | - | 146 | 260 | 328 | 527 | 1145 | |
| Shaft and Z | c | kNm/rad | - | - | 146 | 263 | 332 | 543 | 1136 | |
| Moment of inertia for rotation group | JGR | kgm² | 0.0017 | 0.0017 | 0.0121 | 0.0300 | 0.055 | 0.0959 | 0.3325 | |
| Maximum angular acceleration | α | rad/s² | 38000 | 38000 | 20000 | 13000 | 10000 | 8000 | 4800 | |
| Case volume | V | l | 0.3 | 0.3 | 2.0 | 3.0 | 4.0 | 7.0 | 11.0 | |
| Weight (approx.) | m | kg | 13.5 | 13.5 | 34 | 61 | 76 | 120 | 220 | |
Selection Table
| A4FO28 hydraulic pump | |
| Model No. | Model Code |
| R902231327 | A4FO28/32+A4FO16/32 |
| R902167958 | A4FO28/32+A4FO16/32 |
| R902155768 | A4FO28/32+A4FO16/32 |
| R902089163 | A4FO28/32+A4FO28/32 |
| R902071212 | A4FO28/32L |
| R902239965 | A4FO28/32L-NSC12K01 |
| R902049900 | A4FO28/32L-NSC12K01 |
| R902035990 | A4FO28/32L-NSC12K01 |
| R902071164 | A4FO28/32L-NSC12K02 |
| R902253845 | A4FO28/32L-NSC12KXX-S |
| R902208887 | A4FO28/32L-NSC12KXX-S |
| R902231070 | A4FO28/32L-NSC12N00 |
| R902233498 | A4FO28/32L-NSC12N00 |
| R902228113 | A4FO28/32L-NSC12N00 |
| R902228116 | A4FO28/32L-NSC12N00 |
| R902208964 | A4FO28/32L-NSC12N00 |
| R902077904 | A4FO28/32L-NSC12N00 |
| R902035993 | A4FO28/32L-NSC12N00-S |
| R992001492 | A4FO28/32R-NSC12K01 |
| R902239964 | A4FO28/32R-NSC12K01 |
| R902043182 | A4FO28/32R-NSC12K01 |
| R902043135 | A4FO28/32R-NSC12K01 |
| R902035989 | A4FO28/32R-NSC12K01 |
| R902035992 | A4FO28/32R-NSC12K01-S |
| R992002022 | A4FO28/32R-NSC12K02 |
| R902231325 | A4FO28/32R-NSC12K02 |
| R902239748 | A4FO28/32R-NSC12K02 |
| R902228114 | A4FO28/32R-NSC12K02 |
| R902226104 | A4FO28/32R-NSC12K02 |
| R902035994 | A4FO28/32R-NSC12K02 |
| R902247198 | A4FO28/32R-NSC12KXX-S |
| R902245703 | A4FO28/32R-NSC12N00 |
| R902228115 | A4FO28/32R-NSC12N00 |
| R902229021 | A4FO28/32R-NSC12N00 |
| R902035991 | A4FO28/32R-NSC12N00 |
| R902223466 | A4FO28/32R-NSC12N00 |
| R902071086 | A4FO28/32R-NTC12K02 |
Q1: What is the basic design and application circuit of the A4FO28 pump?
A1: The A4FO28 is an axial piston pump with a swashplate design, and it is specifically engineered for open circuit hydraulic applications.
Q2:In which types of machinery is the A4FO hydraulic pump commonly used?
A2: The A4FO hydraulic pump is commonly found in mobile machinery like excavators and cranes, as well as in various industrial hydraulics and material handling equipment.
Q3:How to purchase an A4FO28 hydraulic pump?
A3:You can click on the right sidebar or the contact information in the top bar to contact us to purchase. You can do so via email, form, WeChat, WhatsApp, or other methods.
Q4:What is the price and delivery time of the A4FO28 hydraulic pump?
A4:The specific price and delivery time will be provided based on the specific model you provide.
