Parker Hannifin Corp, Electromechanical Automation Div.
Port Washington, NY 11050
Aug 26, 2008 Stealth Gen II Helical Planetary Gearheads are equipped with bearing support such as dual angular contact bearings to support output carrier, full complement needle bearings to support planet gears, and optimized gearing geometries. Internal design allows for one fill level for any orientation, which facilitates part number designation and order placement. Units are available with universal mounting kits.

Maxon Precision Motors
Fall River, MA 02720
Jul 01, 2008 Custom-made precision gearhead are designed for motors powerful enough for motion but offering too much speed and too little torque. Planetary and spur gearheads, available in 600+ variations with diameters from 6-81 mm, include planetary gearhead with 2 speeds on output side. Motor shaft goes through gearhead, resulting in 2 speeds with mechanically fixed reduction ratio. Worm gearheads and spindle drives are also available.

Cone Drive Operations, Inc.
Traverse City, MI 49685
Feb 07, 2008 Ranging in size from 1.500-3.500 in. centers, Model RG and Series W have double enveloping worm gearing with backlash as low as true zero. Series W offers Direct Mount, which consists of tapped holes on end of hollow shaft. Direct Mount enables mounting of components directly to hollow output without concern for keyed connection. To facilitate shaft mounting, Model RG is available with base mount output flange.

Wittenstein, Inc. (formerly Alpha Gear Drives, Inc.)
Bartlett, IL 60103
May 01, 2007 Suited as component of servo and stepper motor applications, alphira® low-backlash planetary gearhead is offered in 4 sizes and 5 reduction ratios. Maintenance-free product is housed in unvarnished aluminum case and exhibits greater than 95% efficiency. Designed for cyclic and continuous operation, gearhead has 20,000 hr service life and is built with lifelong lubrication and sealing.

SDP/SI (Stock Drive Products/Sterling Inst)
New Hyde Park, NY 11042 5416
Oct 18, 2006 Designed to align and fit Bu-Ord size 11 devices, models S9111A-T640 (SB), T641 (AB), and T642 (ZB Series) gearheads are available in 3 degrees of anti-backlash precision with 16 different gear ratios ranging from 2:1-36:1. Input shaft is located at front of gearhead, and geartrain design utilizes passivated SS 416 gears and shafts conforming to ASTM 582 and QQ-P-35 standards. Gearheads have black anodized housing measuring 1.250 in. long with 1.062 in. dia.

Wittenstein, Inc. (formerly Alpha Gear Drives, Inc.)
Bartlett, IL 60103
Oct 12, 2006 Two-stage right-angle gearhead, TPK+, is equipped with alpha TP+ planetary gearhead on output side and features helical-toothed planetary gearhead stage mounted at TPK+ output. Hypoid gearset at input (up to i=10 in single stage) enables product to take place of 3-stage bevel-planetary gearhead. Offered with range of reduction ratios, gearhead offers smooth, vibration-free running with torsional and tilting stiffness that lend to precision of dynamic processes.

SDP/SI (Stock Drive Products/Sterling Inst)
New Hyde Park, NY 11042 5416
Oct 11, 2006 Incorporating hardened planet gears machined to AGMA 12 tolerances, Series S9117T-, S9123T-, S9134T-, and S9142T- provide torque multiplication, speed reduction, and inertial matching for dc servo, stepper, and brushless servomotors. Each unit is available with low backlash single- and double-stage reductions with gear ratios ranging from 3:1 to 100:1. Offered in shaft diameters from .250-.625 in., all have anodized aluminum housing and sealed ball bearings.

Danaher Motion
Wood Dale, IL 60191-1073
Jul 07, 2006 Offered as drop-in replacements for helical gearheads, Micron ValueTRUE Planetary Gearheads provide precise operation with 4 arc-min backlash. They come in 8 frame sizes, from 60-200 mm, with inline and right-angle configurations. Lubricated for life, products require no maintenance and feature stainless steel output housing suited for harsh application environments. RediMount(TM)-compliant units mount to any motor in 3 steps: align, mount, and tighten.

Wittenstein, Inc. (formerly Alpha Gear Drives, Inc.)
Bartlett, IL 60103
Jun 02, 2006 Available in 4 sizes, SPK+ exhibits low noise due to smooth-running hypoid gearset on input and optimized helical teeth. Acceleration torques range from 80-1,100 Nm, with 1,000 cycles/hr and 11 reduction ratios from i=12 to i=100. Options of i=16 and i=32 are for applications such as endless positioning, where binary reduction ratios are necessary. Along with universal alpha motor mounting system, product features torsional backlash between 2 and 6 arc min.

Boston Gear
Quincy, MA 02171
May 24, 2006 Suited for packaging, medical, material handling, robotics, and automotive applications, Helical Planetary Precision Gearheads feature planet carrier design, I/O sealing designs, and heat and surface treatments. All exposed gearhead parts are SS with housings available in black anodized aluminum or epoxy-coated. Gearheads provide high output torque, quiet operation, and reduced backlash.

Harmonic Drive, LLC
Peabody, MA 01960
Sep 09, 2005 SHD Gearhead Size 14 combines harmonic drive gearing and cross roller bearing, delivering zero-backlash, 1.5 arc-min positional accuracy, and ±5 arc-sec repeatability. With 70 mm OD and 17 mm length, product has rated torque of 33 lb-in. and max torque of 310 lb-in. Available gear ratios are 50:1 and 100:1. Suited for OEM robotic applications, design enables gearhead to be incorporated into machine housing by providing necessary motion control components.

Baldor Electric Company
Fort Smith, AR 72901
Apr 04, 2005 Planetary Gearhead suits servo motor applications that require precision and durability. It mounts directly to company's BSM servo motor family to provide torque multiplication, speed reduction, and inertia matching. Standard backlash is 15, 12, or 10 arc-minutes. Steel construction allows high-rated torque for emergency stopping. Dual ball bearing support provides stiffness and high radial-load capacity. Five models offer ratios of 5, 7, 10, 16, 25, 50, and 100:1.

Wittenstein, Inc. (formerly Alpha Gear Drives, Inc.)
Bartlett, IL 60103
Sep 02, 2004 Model HG+ achieves efficiency above 96% with guaranteed backlash of less than 4 arc minutes, ratios of i=3-10, and acceleration torque of 20-640 Nm. Available in 5 sizes, unit mounts to all servomotors using universal mounting system. It is suited for applications such as packaging and converting machinery, handling and gantry robots, and flat bed type machinery.

Wittenstein, Inc. (formerly Alpha Gear Drives, Inc.)
Bartlett, IL 60103
Aug 12, 2004 Model HG+ achieves efficiency above 96% with guaranteed backlash of less than 4 arc minutes. Available in 5 sizes, single-stage gearhead mounts to all servomotors using universal mounting system. It is suited for applications such as packaging and converting machinery, handling and gantry robots, and flat bed type machinery.

Harmonic Drive, LLC
Peabody, MA 01960
May 07, 2004 Quantum Series Size 14 gearhead is 41 mm long with 73 mm OD. Available in gear ratios of 50, 80, and 100:1, zero-backlash, harmonic drive unit offers rated torque of 89 lb-in., maximum torque of 620 lb-in., and ±5 arc-sec repeatability.

Danaher Motion MCD
Amherst, NY 14228
Feb 04, 2004 EverTRUE continuous-duty, planetary gear head is available in 100, 140, and 180 mm sizes with ratios from 4:1 to 100:1. Lubricated for life, unit requires no maintenance or downtime. It runs at lower operating temperature compared to industry standard and has 4 arc-min of backlash. EverTRUE gear head is RediMountâ„¢ compliant, which provides error-free, 3-step mounting system.

Wittenstein, Inc. (formerly Alpha Gear Drives, Inc.)
Bartlett, IL 60103
Dec 16, 2003 Available in 7 sizes, SP+ gearheads have output bearing design and utilize proprietary shaft seals that offer IP 65/66 protection. Dry-lubricated design contributes to units' 30,000 hr rated service life. Available in gear ratios from 3:1-100:1, including binary gear ratios, products run up to 4,500 rpm in continuous operation and feature noise levels down to 64 dB(A). They offer 17-750 Nm (nominal) and 40-1,100 Nm (acceleration) torque ranges.

Harmonic Drive, LLC
Peabody, MA 01960
Nov 26, 2003 Measuring 32 mm square x 29 mm long, Model CSF-XHF Size 8 Gearhead features rated torque of 21 lb-in. and max torque of 80 lb-in. Flange output allows for compact axial length, and input of gearhead provides direct connection to any motor. Zero-backlash unit is available in gear ratios of 30, 50, and 100:1.

Harmonic Drive, LLC
Peabody, MA 01960
Nov 14, 2003 Available in Shaft- and Flange-output configurations, Series CSF-GH Quick Connect Gearhead mounts to any motor and maintains all benefits of harmonic drive gearing, including zero-backlash. Adapter flange and clamp-style shaft coupling allow assembly with servomotor. Cross roller bearing, used as output bearing, supports radial, axial, and moment loads. Unit has rated torque of 69 in.-lb, peak torque of 248 in.-lb, and gear ratios of 50, 80, 100, 120, and 160:1.

Wittenstein, Inc. (formerly Alpha Gear Drives, Inc.)
Bartlett, IL 60103
Jun 12, 2003 Series LP gearheads, suited for general motion control, are now available in 7:1, single-stage and 70:1, 2-stage gear ratios. Series is available in NEMA sizes from 23-56, torque ranges from 46-2,566 lb-in., and ratios from 3:1 through 100:1. LPB series LP gearbox and integrated belt pulley solutions eliminate need for right angle gearbox and couplings. They directly support high belt tensions without need for additional bearings and handle radial loads.