QYEH Internal Gear Units

The units are optimized for variable-speed drives across a wide speed range and for operation in reverse mode. They feature a single gear stage, and their compact design can be easily integrated into space-constrained machines. The QYEH series also offers additional advantages in demanding environments with high cyclic loads. The robust design supports long service life and high reliability, allowing operation with a variety of critical fluids while maintaining cavitation resistance, even under critical conditions.

The QYEH’s non-compensated design, featuring a special gear geometry and only two moving components, ensures low operating noise at a pleasant frequency, combined with low pulsation. 

QYEH Internal Gear Units
  • Lowest operating noise
  • High efficiency
  • Wide speed range
  • Reversible
  • Highest lifetime
  • Double units available
Type Operating pressure (continuous) up to
bar
Operating pressure (intermittend) up to
bar
Displace­ment
cm³/rev
Speed max.
rpm
QYEH32-010 250 280 10 5500
QYEH32-012 250 280 12,6 5100
QYEH32-016 250 280 15,6 4300
QYEH42-020 250 280 20,3 4000
QYEH42-025 250 280 25 3700
QYEH42-032 250 280 32,3 3400
QYEH52-040 250 280 39,1 3200
QYEH52-050 250 280 50,3 3000
QYEH52-063 250 280 63,4 2800
QYEH62-080 250 280 79,8 2700
QYEH62-100 250 280 100,5 2500
QYEH62-125 250 280 124,5 2300
  Type File extension Size
Internal-Gear-Units-QYEH_100-FL-000193-en Flyer PDF 1.7 MB
QYEH_808-P-000010-en Catalog / Data sheet PDF 898.6 KB
  • Hydraulic presses
  • Machine tools
  • Waste compactors
  • Lift/elevator drives
  • Hydraulic power units