HMB270 High-Efficiency Motor

1. HMB270: Fixed‑displacement Staffa motor frame size 270

2. P1 / P2: Parallel keyed shaft

3. S3 / S5: BS spline shaft; Z: DIN5480 spline shaft; T: taper keyed shaft

4. FM3 / SM3: Main port housing configuration (SAE port)

5. B: Heavy‑duty bearing option

6. T: Built‑in spring‑applied hydraulic‑release multi‑disc brake (load‑holding)

7. V: Vertical‑up shaft orientation (extra drain port with check‑valve)

Related variants:

• HMC270: Two‑speed variable‑displacement motor (100 % / ~50 % displacement), hydraulic pilot shift required

• HMHDB270: Heavy‑duty reinforced version for high shock‑load applicationsKawasaki P...

Core Design Features

Typical Applications

1. Marine: Large anchor windlasses, heavy mooring winches, deck capstans, hatch cover drives, offshore deck machinery

2. Industrial: Heavy‑duty winches, large reel winder/unwinder, heavy slewing drives, mining rotary equipment

3. Heavy material‑handling requiring very high torque at low rotational speed

Critical Installation & Piping Guidelines

1. Case drain line: Must connect directly to hydraulic tank, do not tee‑into main return line. Minimum pipe bore ≥ 16 mm for drain runs up to 5 m; increase bore for longer piping.

2. Vertical‑shaft‑up mounting: Order suffix V, use extra drain port with check‑valve to prevent oil siphoning and bearing starvation.

3. Shaft coupling: Strict alignment required; avoid applying excessive radial / axial external loads to output shaft.

4. System filtration recommendation: ISO 4406 cleanliness ≤ 22/18/13, absolute filter ≤ 20 μm.

5. For fire‑resistant hydraulic fluids (HFC / HFDU): Special seal set must be specified on order.

6. If crankcase back‑pressure may exceed 3.5 bar, high‑pressure shaft seal is requiredKawasaki P....

Ordering Checklist

1. Complete full part‑number (HMB270‑xxx‑xxx‑xxx)

2. Shaft type (P1/P2/S3/S5/Z/T)

3. Port housing variant (FM3 / SM3)

4. Options: Built‑in brake(T), heavy‑duty bearing(B), stainless‑steel shaft sleeve

5. Shaft mounting orientation: Horizontal / Vertical‑up(V) / Vertical‑down

6. Seal requirement: Standard NBR or special seals for non‑mineral oil

7. Application: Marine / industrial, duty‑cycle, pressure‑speed profile

Common Trouble‑shooting Hints