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QXEM
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Catalog excerpts

QXEM - 1

Internal Gear Unit for motor/pump service Series QXEM

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QXEM - 2

2/12 100-P-000225-EN-00/04.2017 Internal Gear Unit QXEM

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QXEM - 3

Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Performance graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Minimum speed...

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QXEM - 4

4/12 100-P-000225-EN-00/04.2017 Internal Gear Unit QXEM

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QXEM - 5

1 General 1.1 Product description For applications requiring variable-speed multi-quadrant operation, Bucher Hydraulics has developed a special version: The QXEM internal gear drive unit. One of the central points in the QXEM series is its symmetric construction, with identical high and low pressure areas. With special metering grooves and lubrication systems as well as two same-size pressure-tight connections, the design is specially optimised for 2 and 4 quadrant modes and is thus ideally suited to both directions of rotation at high and low pressures. Thanks to the use of high-precision...

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QXEM - 6

BUCHER hydraulics 2.2 Main characteristics IMPORTANT: The main characteristics are valid for hydraulic oils DIN 51524 with a viscosity of 42mm2/s. 1) Intermittent pressure for max. 20 sec/min but not more than 10% of the duty cycle. 2) Theoretical value at the maximum permitted continuous pressure. For starting torques, see section 3. 3) Minimum inlet pressure 0,98 bar absolute. 3.1 Minimum speed limit for pump and motor operation □ continuous operation □ intermittent operation 1) □ intermittent operation of max. 5 sec. □ intermittent operation of max. 2 sec. 1) Intermittent pressure for...

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QXEM - 7

Measured to DIN 45635 part 26 in low-echo noise measurement chamber, valid for single units with deviations of ± 1,5 dB [A]. 3.2.1 QXEM22 100-P-000225-EN-00/04.2017 Internal Gear Unit QXEM

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QXEM - 8

3.3 Efficiency (ƞ) Measured with viscosity 42 mm2/s, speed 1450 min-1 Solid line = continous pressure / dashed line = max. intermittent pressure Volumetric efficiency Hydro-mechanical efficiency

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QXEM - 9

4 Dimensions Frame size 1) For SAE J518 code 61 bzw. ISO6162-1 pipe flange dimensions see section 10 2) For other shaft ends, contact Bucher Hydraulics 3) Threaded ports to DIN 3852 Part 2 1 Option 66 = 4-hole mounting flange ISO 3019/2 9/12 100-P-000225-EN-00/04.2017 Internal Gear Unit QXEM

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QXEM - 10

Internal gear unit Frame size Pressure range Direction of rotation, unrestricted (to be inserted by the factory, see section 5.3 for a selection) 5.1 Ordering example Required: Displ./Consump.: Continuous pressure: For use with mineral oil: Ordering code: internal gear drive unit QXEM 40 cm3/rev 210 bar HLP QXEM 52-040 N 5.2 Standard configuration • Direction of rotation - unrestricted • 2-hole mounting flange to ISO 3019/1; Frame size QXEM 3-6 2-hole mounting flange to ISO 3019/2; Frame size QXEM 2+8 • Nitrile seals • Cylindrical shaft end to ISO R775 • Separate drain port in rear cover of...

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QXEM - 11

6 Fluid cleanliness QXEM internal gear units require a fluid with a minimum cleanliness level of NAS 1638, Class 9 or ISO 4406, code 20/18/15. We recommend the use of fluids that contain anti-wear additives for mixed-friction operating conditions. Fluids without appropriate additives can reduce the service life of pumps and motors. The user is responsible for maintaining, and regularly checking, the fluid quality. Bucher Hydraulics recommends a load capacity of > 30 N/mm2 to Brugger DIN 51347-2. 7 Note This catalogue is intended for users with specialist knowledge. The user must check the...

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QXEM - 12

10.1 Pipe flanges - high pressure type - max. operating pressure 420 bar - Material ST37 / Viton seals (on request) - flange size SAE J518 code 61 / ISO 6162-1 Threaded pipe flanges are spot-faced for DIN 2353 pipe fitings Material 1) We recommend the use of seamless precision steel tube to DIN 2391 with-wallthick. max 6 mm info.kl@bucherhydraulics.com www.bucherhydraulics.com © 2017 by Bucher Hydraulics GmbH, D-79771 Klettgau Alle Rechte vorbehalten. Die angegebenen Daten dienen allein der Produktbeschreibung und sind nicht als zugesicherte Eigenschaften im rechtlichen Sinne zu...

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