Compact fit for gearhead trio
A
Stock Drive Products/Sterling Instrument product story
Edited by the Engineeringtalk editorial team
Jan 25, 2006
Three precision transducer gearheads have mounting design that assures precision alignment and compact modular fit with any Bu-Ord size 11 information transducing device.
Three precision transducer gearheads made by Sterling Instrument have a mounting design that assures precision alignment and compact modular fit with any Bu-Ord size 11 information transducing device.
These include synchros, resolvers, encoders, differentials and RVDTs.
Applications include instrumentation, medical devices, production machinery robotics, aircraft and satellites.
These standardised gearheads - models S9111A-T640, T641 and T642 - are available in three degrees of anti-backlash precision, each with a choice of 16 gear ratios from 2:1 to 36:1.
The high speed input shaft is at the front of the gearhead.
The output of the gearhead is the gear that is mounted on the shaft of the information transducing device.
The geartrain uses passivated stainless steel 416 gears and shafts that conform to ASTM 582 and QQ-P-35 standards.
The T640 backlash or SB unit is typically used in unidirectional feedback systems.
Maximum backlash, measured at the transshaft, is 20 arc minutes.
Better anti-backlash tolerances are achieved by the AB T641, which is typically used in positioning servo systems or position data transmitting loops.
This has a maximum backlash of 10 arc minutes.
The zero backlash, or ZB series, has a backlash of less than one arc minute and is typically used in aircraft and satellite applications.
The maximum end play, with 0.45kg gauge load is 0.0254mm.
A choice of two mounting options are available - either a clamp for easy phasing of transducers or an adapter plate with machine screws for transducer devices with tapped holes in the mounting face.
The black anodised housing is machined from aluminium alloy 2024-T4 in accordance with QQ-A-225/6 and Mil-A-8625 type 1, Cl-2.
The housing measures 31.75mm long by 27mm in diameter.
The housing length for the adapter plate version is 34.3mm.
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Tel +1 516 328 3300
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