Product category:
Hydraulic Components
News Release from: SAI (GB) | Subject: BD and GD series
Edited by the Engineeringtalk Editorial
Team on 24 August 2005
Dual displacement motors boast wide
speed range
A new range of dual displacement radial piston hydraulic motors offers low-speed controllability and performance, down to "creep" speed, coupled with high speed running capabilities up to 3500rev/min.
A new range of dual displacement radial piston hydraulic motors from SAI offers low-speed controllability and performance, down to "creep" speed, coupled with high speed running capabilities up to 3500rev/min in certain sizes The high starting and running torques produced across the full speed range, as normally associated with radial piston motors, can now be combined with high speed running all within one relatively light and compact unit
This article was originally published on Engineeringtalk on 22 Nov 2002 at 8.00am (UK)
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The motor's added ability to operate in the "freewheel" mode makes it ideally suited to winch applications as well as to both on and off-highway transmissions.
Two ranges, known as the BD and GD series, give displacement combinations ranging from 25 to 1848cm3/rev, with variation ratios of approximately 2:1, 3:1 and 4:1.
Switching from large to small displacement is achieved by simply applying 20bar pressure to the pilot port.
This alters the throw of the crankshaft eccentric and hence the geometric displacement.
If required, the changeover operation can be carried out dynamically resulting in a smooth transition from slow to high speed.
This newly released product line is the result of some 10 year's of continuous development and testing in SAI's own R and D Division, as well as lengthy field trials in the most arduous of conditions.
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