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APM series
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Catalog excerpts

APM series - 1

APM212 Gear Motors, including Fan Drive Gear Motors Standard and Low Noise series

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APM series - 2

General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External gear motors for general use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fan Drive Gear Motors for cooling systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External gear motors components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Example of typical sound pressure level recorded in a semi-anechoic...

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APM series - 3

General information External gear motors are widely used in modern hydraulic systems due to their high performance, long service life and low maintenance costs. With the new APM212 family, high operating pressures, ex­ cellent volumetric and mechanical efficiencies were achieved; moreover, for LN­series (Low Noise versions), definitely better acoustic performances were obtained. Different features of the new APM design were deeply ana­ lyzed and studied in order to get to the above mentioned results; primarily, engineering attention was focused on the design of the gear teeth and balancing...

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APM series - 4

1.2 Fan Drive Gear Motors for cooling systems Improve machine operating efficiency Allow to integrate hydraulic values circuit Reduce the costs of maintenance Electronic control available Reduce noise and vibrations Examples of typical applications Telehandler Large Wheel loader Hydraulic scheme examples

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APM series - 5

1.3 External gear motors components 1 Retaining ring Shaft seal ring support Shaft seal Front cover Back up seal Balancing seal Balancing block 8. Take off power gear 9. Gear 10. Oil seal 11. Centering pin 12. Motor body 13. Back cover 14. Fixing screw and washer 1.3.1 Improvements (New APM212 vs APM200) Front covers : Back covers : In addition to aluminium versions, complete new range of cast iron front covers Wide range of aluminium and cast iron back covers with/ without integrated cartridge valves Balancing blocks : New generation optimised and standardised balancing blocks As general...

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APM series - 6

12 = number of new optimised teeth H = 15-18-21 APM212 optimised balancing area with higher performance materials APM212 Low Noise gear motor Pulsation reduced APM200 Standard gear motor 1.4 Example of typical sound pressure level recorded in a semi-anechoic testing room Noise reduction effects Oil temperature: 40°C - Oil viscosity: 32 mm2/s Distance between motor and sensor: 1 m

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APM series - 7

* Referred to motors with flanged ports. Utilising threaded ports, ** Obtained with a specific balancing plate please to consider a significantly de-rated performances. The mechanical stress localised on threaded ports cause a re- duced motor life performances IMPORTANT!: Please consult Bucher Hydraulics if even one of the operating limits indicated in the table (tempera- ture, pressure, rpm) is exceeded, as well as in the case of two or more maximum values at the same time, or for applications with particularly heavy-duty cycles 1.6 High inlet pressure Pressure levels: P3 =max peak...

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APM series - 8

1.7 Identifying the rotation direction The rotation direction of a gear motor is identified by looking at the motor from the front and with the drive gear turned up­ wards (see figures below). The figure also shows the pressure flow inside the motors as the oil is transferred from the inlet port to the outlet port. As regards reversible motors (R), the ports are alternatively for inlet and outlet. Motors with clockwise rotation (D) have a drive gear which turns clockwise, with the inlet port on the left and the outlet port on the right. Motors with counterclockwise rotation (S) have a drive...

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APM series - 9

1.9 Radial and axial load 1.9.1 Standard version Bucher APM212 gear motors are suitable to work also when radial and axial loads are applied to it. What shown must be considered the worst load conditions which our motors have to submit to. In order to guarantee the correct life of the hydraulic motor, it is necessary to let the component work within the limits in­ dicated in the table below: Radial load: the maximum admissible radial loads must be calculated considering both the fan weight and the unbal­ anced mass. Radial load Axial load Axial load: the limits of axial loads apply to both...

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APM series - 10

Limit indications: Shaft seal: Maximum pressure admitted IMPORTANT! The pressure on the outlet line has to be checked in order to choice the right motor configuration. Different solutions are available depending on pressure value recorded. See examples from 1 to 4 Pressure [bar] 10 8 These limits have 6 to be respected in 4 the worst working 2 conditions 0 Standard shaft seal Outlet pressure must be remain inside L area Bidirectional motor used in only one direction DRAIN Unidirectional motor with drain line (drain pressure must be remain inside L area) Standard shaft seal OUT OUT IN High...

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APM series - 11

1.11 General installation precaution In addition to the recommendations regarding fluids, filtra­ tion, coupling, etc., we suggest the following: - For unidirectional motors check always the rotation direction of the motor's take off shaft; it must be compatible with the rotation direction of the motor itself. - Be particularly careful in cleaning and make sure, when connecting the high and low pressure piping, that no chips, rag threads, teflon tape, etc. get into the motor circulation system. - Check the tightness of the high and low pressure fit­ tings, the correct positioning of the...

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APM series - 12

1.12 Directives and standards Atex Machinery safety Attention: The equipment and protective systems of these catalogue ARE NOT intended for use in potentially explosive atmospheres that is to say where there is an explosive atmosphere referred to in Article 2 of the Directive 99/92/EC and re­ ferred to Article 1.3 of the Directive 94/9/EC Hydraulic motors are excluded by Directive 98/37/EC ISO 9001: 2000 Bucher Hydraulics S.p.A. is certified for research, develop­ ment and production of directional control valves, gear pumps and motors, power units, electro pumps, cartridge valves and...

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All BUCHER Hydraulics catalogs and technical brochures

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  2. APM212

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  16. QXEM

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