Company Profile


Stock Drive Products/Sterling Instrument is a manufacturer of electromechanical components and assemblies. Products include gears, timing belts, pulleys, sprockets, chain drives, couplings, bearings, brakes, clutches, differentials, gearheads, speed reducers, linear motion systems, motors, gearmotors, right angle drives, shafts, universal joints and vibration mounts.

For: Sdp/Si

Company Info

P: 516-328-3300
P: 800-819-8900
F: 516-326-8827

SDP/SI Entries

  • ►  Motors • Stepper Motors 

    For: Entry

    A brushless, synchronous motor that is controlled by coils and utilized for a variety of applications.

    SDP/SI offers stepper motors with max holding torque of 222 to 1800 oz/inch, gear ratio of 5, 10, or 18 to 1, NEMA frame size of 17 or 23, max input speed of 1000 RPM, and more.

  • ►  Motors • Gear Motors • Right Angle Gearmotors 

    For: Entry

    Right Angle Gearmotors

    SDP/SI is a manufacturer of a variety of right angle gearheads, including right angle planetary and spur gear designs, as well as speed reducers. Their right angle planetary Economy Series features gear ratios or 3:1 to 5.5:1, continuous peak torque of 120/150 in-lb to 1726/2398 in-lbs, and max rated input rpm of 4000 to 5000.

  • ►  Motors • DC Motors • DC Micro Motors 

    For: Entry

    SDP/SI offers DC micro gearmotors in metric sizes of 12mm to 27mm. Size 12 DC gearmotors are available in 3, 4.5 and 12V with gear ratios of 15:1 - 209:1, rated torque from 0.98 (.14) thru 13.73 (1.9) (, RPM of 817 thru 889, and rated current of 30 mA thru 110 mA.

  • ►  Power Transmission • Belts & Belting • V-Belts 

    For: Entry


    SDP/SI is a manufacturer of timing belts, including fractional HP V-belts in inch or metric sizes. Choose from standard or notched type, pitch length, belt size, outside length, and material. There are hundreds of V-belt configurations available.

  • ►  Bearings • Needle Bearings 

    For: Entry

    Needle bearings are heavily used in engine components such as rocker arm pivots, pumps, compressors, and transmissions.

    SDP/SI is a manufacturer of needle roller bearings in inch and metric sizes, with or without inner races. You can specify by nominal ID/OD, width, material, housing bore, inner race, maximum load (static or dynamic), maximum speed, and shaft diameter and tolerance.

  • ►  Power Transmission • Sprockets 

    For: Entry

    Similar to pulleys but instead of smooth surfaces sprockets have teeth that fit into chains, tracks or other perforated materials and rotate to create torque.

    Stock Drive Products/Sterling Instruments manufactures a variety of sprockets for industrial power transmissions includingl adder chain and roller chain sprockets in a variety of sizes and configurations.

  • ►  Bearings • Ball Bearings • Flanged Ball Bearings 

    For: Entry

    Stock Drive Products/Sterling Instruments manufactures flanged ball bearings in metal and metal extended race, and plastic and linear designs. Options include no shield, single shield, or double shield.

  • ►  Bearings • Ball Bearings • Inch Size Ball Bearings 

    For: Entry

    Stock Drive Products/Sterling Instrument engineers and manufactures metal, metal extended race, plastic and linear inch size ball bearings. Types include plain no shield, flanged no shield, flanged double shield, plain single shield, plain double shield, and flanged single shield.

  • ►  Bearings • Ball Bearings • Stainless Steel Ball Bearings 

    For: Entry

    Stock Drive Products/Sterling Instruments distributes extended race and 440C stainless steel ball bearings featuring bore sizes from .0400" to .7500".

  • ►  Motors • Metric (IEC) Motors 

    For: Entry

    Metric motors are motors designed in metric sizes rather than imperial measurements.

    Stock Drive Products/Sterling Instruments distributes metric AC gearmotors, metric DC gearmotors, and metric stepper motors. The AC gearmotors feature maximum output torque ranging from .1 Nm to 1 Nm and motor load speed of 1200/1450 RPM. The stepper motors feature a double shaft configuration and holding torque of 123 or 350

  • ►  Motion Control • Actuators • Ball Screw Actuators 

    For: Entry

    Stock Drive Products is a manufacturer of automation shafts and accessories including ball nuts, ball screws, and bearings as well as a variety of metric ball screw actuators. Models are available with machined and unmachined ends in a variety of materials.

  • ►  Power Transmission • Gears • Helical Gears 

    For: Entry

    SDP/SI is an online supplier of helical and axial helical gears. You can specify product by diametral pitch, number of teeth, materials, bore, helix angle, pressure angle, pitch diameter, outside diameter, face width, and more.

  • ►  Power Transmission • Belts & Belting • V-Belts • Multi Groove V Belts 

    For: Entry

    SDP/SI distributes double groove V-belts constructed of cast iron. The V-belts are available in 3/8" x 1/4" or 1/2" x 9/32" sizes - with 1/2" bore sizes.

  • ►  Power Transmission • Belts & Belting • Drive Belts 

    For: Entry

    SDP/SI offers timing belts, open ended timing belts, fractional V-belts, flat belts, posi-drive belts, round endless belts, TruMotion belts, and Coniddrive belts available in metric and inch sizes.

  • ►  Power Transmission • Belts & Belting • Endless Belts 

    For: Entry

    SDP/SI distributes endless belts that feature operating temperature of -30F to 185F, with 1/5" pitch and trapezoidal teeth on one side. Available with widths of 1/4", 3/8" and 1/2" with 60 teeth per foot, the belts are used for machine tool applications.

  • ►  Power Transmission • Flexible Shafts 

    For: Entry

    Flexible shafts are devices for transmission of rotary motion between two non-fixed objects.

    SDP/SI is a manufacturer of small mechanical components. Flexible shaft products offered include remote control flexible shafts without casings featuring socket head set screws, bore sizes from 0.127 to 0.375, cable diameters from 0.098 to 0.250 and curvature radii from 1.5" to 25".

  • ►  Motors • DC Motors • Metric DC Motors 

    For: Entry

    SDP/SI offers a variety of DC metric motor configurations, including: size 12, size 20, size 37 heavy duty, size 42 light duty, and size 60. Size 12 metric DC gearmotors has rated voltages from 3 to 12V, gear ratios ranging from 15 to 209, and rated torques from 0.14 to 2.8 oz-in. These motors feature rated output speeds ranging from 38 to 889 RPM, rated currents to 110 mA, and lengths up to 55.1mm. SDP/SI also offers stepper motors, AC gearmotors, DC motors without gearheads, stepper gearmotors, etc.

  • ►  Bearings • Roller Bearings • Flanged Roller Bearings 

    For: Entry

    SDP/SI offers metric and inch flange mounted roller bearings. These bearings feature needle roller bearing types, maximum speeds ranging from 4100 to 750000 RPM, flange thicknesses ranging from 1.3 to 2.3mm. They are available in bore sizes ranging from 4 to 18mm, maximum radial loads up to 6380N, and 5°, nonaligning°, or self-aligned ±5° alignment configurations.

  • ►  Bearings • Ball Bearings • Plastic Ball Bearings 

    For: Entry

    SDP/SI manufactures plastic ball bearings in a variety of styles. These single shield designs are ideal for commercial applications, and are constructed from acetal, glass, and stainless steel materials. Features include bore sizes ranging from 0.250" to 0.750", overall widths ranging from 0.218" to 0.313", dynamic loads up to 88 lbs, and static loads up to 64 lbs.

  • ►  Power Transmission • Gearmotors & Drives 

    For: Entry

    Gear motors are small motors constructed with integral gear reducers, and drives are systems used for controlling motor speed.

    SDP/SI offers stepper gearmotors, stepper motors, hydbrid stepper motors, NEMA stepper motors, size 60 DC gearmotors, size 48 DC gearmotors, light-duty DC gearmotors, size 12 DC gearmotors, etc. Stepper gearmotors have holding torque ratings ranging from 222 to 1800 oz-in, NEMA frame sizes ranging from 17 to 23, input speeds up to 1000 RPM, and 5 to 18 gear ratios. These gearmotors come in shaft diameters ranging from 0.250" to 0.3125", lengths ranging from 3.65" to 5.96", and rated currents up to 4.7".

  • ►  Power Transmission • Belts & Belting • Flat Belts 

    For: Entry

    SDP/SI offers metric and inch flat belts. Inch flat belts are constructed from neoprene/polyester materials, and they are capable of speeds of up to 20000 FPM. These belts come in lengths ranging from 5.12" to 19.69", 1/4" widths/pulley diameters, and 0.018" thicknesses.

  • ►  Power Transmission • Belts & Belting • Round Belts 

    For: Entry

    SDP/SI offers metric and inch round belts. Neoprene metric round belts come in cross sectional diameters ranging from 2 to 5mm, inside diameters ranging from 10 to 381mm, and 70 hardness ratings.

  • ►  Motors • Electric Motors • NEMA Motors 

    For: Entry

    SDP/SI offers stepper motors in double and single shaft configurations. These motors feature holding torques ranging from 13.9 to 1,125 oz-in, phase inductance ratings ranging from 0.8 to 30 mH, unipolar currents ranging from 1 to 30 Amps, and shaft diameters ranging from 0.1968" to 0.6248".

  • ►  Bearings • Linear Bearings • Linear Ball Bearings 

    For: Entry

    SDP/SI offers metric and inch linear ball bearings. Inch linear ball bearings come in OD sizes ranging from 1/2" to 2-3/8", bore sizes ranging from 1/4" to 1-1/2", and lengths ranging from 0.750" to 3". Features include static load ratings up to 1214 Lbf, dynamic load ratings up to 663 Lbf, and a 52100 steel/hardened steel construction. They can be ordered in open, closed, or adjustable types.

  • ►  Power Transmission • Speed Reducers • Planetary Speed Reducers 

    For: Entry

    SDP/SI offers single and double stage inline, and single, double and triple stage right angle planetary gearheads. Products offer ratios of 3:1 to 100:1 in NEMA sizes 17, 23, 34 and 42 (metric sizes 60, 90 and 115).

  • ►  Fasteners • Rings • Metric Retaining Rings 

    For: Entry

    SDP/SI is a manufacturer of small precision mechanical components. Retaining ring products available in metric sizes include carbon spring steel internal rings in 0.8mm, 1mm and 1.2mm thickness with housing diameters from 8mm to 25mm and groove with from .9mm to 1.3mm.

  • ►  Fasteners • Rings 

    For: Entry

    Industrial fasteners installed in grooves to hold components or prevents their movement

    SDP/SI manufactures retaining rings in various shapes, sizes, materials, and grades, while offering in house engineering and the ability to utilize pre-existing designs to meet custom and unique application requirements. Their typically manufactured rings include: standard, external, internal, bearing retainers, external bowed, grooveless, and e-rings.