Motor for hydraulic applications HMKB

variable-speedhigh-torquehigh-efficiency

Overview
Staffa low-speed high torque radial piston motors are widely used for screw drives for injection molding applications and deck machinery. They are simple in construction where radial pistons directly work on the eccentric cam. 2-speed motors with valves have two pre-set displacements which can be chosen from a wide range to suit specific application requirements. 3-speed motors have three pre-set displacements. The product range includes HMKB/HMKC series, HMB/HMC series (standard motors), HPB/HPC series (enhanced version of HMB/HMC), and HMF series (3-speed motors).

Features

• Fixed and variable speed motors (available as 1-speed, 2-speed or 3-speed)
• Simple and robust construction
• Long service life
• High efficiency
• Constant horsepower control by CHP valves available

Specifications (by series / model)
HMKB (Fixed displacement, 1-speed)
Model types: 046 / 075 / 100 / 200
Displacement (cm3): 745 / 1,281 / 1,510 / 3,087
Pressure Rated: 20.6 MPa
Pressure Maximum: 24.5 MPa
Maximum speed (min-1) at Rated pressure: 250 / 220 / 200 / 130

HMB (Fixed displacement, 1-speed)
Model types: 010 / 030 / 030 (FM3) / 045 / 060 / 080 / 100
Displacement (cm3): 188 / 442 / 492 / 700 / 983 / 1,344 / 1,639
Pressure Rated: 20.7 MPa (for smaller models) and 25.0 MPa (for larger models)
Pressure Maximum: 24.1 MPa (smaller) and 29.3 MPa (larger)
Maximum speed (min-1) at Rated pressure: 500 / 450 / 450 / 400 / 300 / 300 / 250
Power (kW) Rated: 25 / 42 / 52 / 60 / 80 / 100 / 110

H M / H D B family (larger HMB types)
Model types: 125 / 150 / 150 (FM3) / 200 / 200 (FM3) / 270 / 325
Displacement (cm3): 2,050 / 2,470 / 2,470 / 2,470 / 3,087 / 4,310 / 5,310
Pressure Rated: 25.0 MPa
Pressure Maximum: 29.3 MPa
Maximum speed (min-1) at Rated pressure: 220 / 220 / 168 / 175 / 135 / 125 / 100
Power (kW) Rated: 100 / 115 / 115 / 130 / 130 / 140 / 140

HMHDB / HMB very large types
Model types: 400 / 500
Displacement (cm3): 6,800 / 8,000
Pressure Rated: 25.0 MPa (for 400) and 19.0 MPa (for 500 HMB column)
Pressure Maximum: 29.3 MPa (400) and 22.7 MPa (500 HMB column)
Maximum speed (min-1) at Rated pressure: 120 / 100
Power (kW) Rated: 190 / 170

HPB (Fixed displacement, 1-speed)
Model types (examples): 060 (FM3/FM4) / 080 (FM3/FM4) / 100 (FM3/FM4) / 125 (FM3) / 150 / 200 / 270 / 325 (various FM variants)
Displacement (cm3): 983 / 1,344 / 1,600 / 2,050 / 2,470 / 3,087 / 4,310 / 5,310 (depending on variant)
Pressure Rated: typically 20.5–25.0 MPa depending on model
Pressure Maximum: up to 30.0 MPa for some variants
Maximum speed (min-1) at Rated pressure: ranges by model (examples: 450 / 490 / 340 / 430 / 270 / 365 / 215)
Power (kW) Rated: ranges from ~115 up to ~215 depending on model and FM variant

HMKC (Variable displacement, 2-speed)
Model types: 046 / 075 / 080 / 200 (examples shown)
Displacement 100%: 745 / 1,241 / 1,475 / 3,087 (cm3)
Displacement 50%: 410 / 574 / 737 / 1,475 (cm3)
Pressure Rated: 20.6 MPa
Pressure Maximum: 24.5 MPa
Maximum speed (min-1): at q max: 300 / 220 / 200 / 130; at 0.5q max: 600 / 440 / 400 / 260; at q=0: 1,500 / 1,300 / 1,200 / 1,000

HMC (Variable displacement, 2-speed)
Model types: 030 / 045 / 080 (FM3/FM4) / 125 (FM3) (examples)
Displacement 100%: 492 / 737 / 1,600 / 2,048 (cm3) depending on model
Displacement 50%: 246 / 410 / 819 / 983 (cm3)
Pressure Rated: 20.7 MPa (some) and 25.0 MPa (others)
Pressure Maximum: 24.1 MPa (some) and up to 27.5 MPa (others)
Maximum speed (min-1): at q max examples: 450 / 450 / 270 / 365; at 0.5q max examples: 600 / 600 / 500 / 515; at q=0: up to 1,000
Power (kW) Rated: examples 60 / 99 / 138 / 138 / 135 depending on variant

HPC (Variable displacement, 2-speed)
Example shown: model 400 with displacement 6,555 cm3 (100%) and 3,590 cm3 (50%)
Pressure Rated: 25.0 MPa
Pressure Maximum: 27.5 MPa
Maximum speed (min-1): 220 at q max, 220 at 0.5q max, q=0 speed 1,500
Power (kW) Rated: example 430 kW for shown variant

HMF (Variable displacement, 3-speed)
Model types: 080 (FM3/FM4) / 200 (FM3/FM4) / 270 / 325 (examples)
Displacement 100%: 1,600 / 3,087 / 4,588 / 5,326 (cm3)
Displacement 50%: 819 / 1,475 / 4,588 / 5,326 (cm3) depending on variant
Pressure Rated: 25.0 MPa
Pressure Maximum: 27.5 MPa
Maximum speed (min-1): examples at q max: 270 / 365 / 175 / 230; at 0.5q max: 500 / 515 / 300 / 400; at q=0 up to 1,000
Power (kW) Rated: examples 138 / 138 / 250 / 250 / 189 depending on variant

Download / Documentation
Manufacturer catalog and series catalog available as PDF documentation (catalog entries referenced on the product page).