SERVO-TEK ® SERVO-TEK PRODUCTS COMPANY, INC. DC Tachometer Generators www.servotek.com RC-700 rev. 2 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com SERVO-TEK ® Technical Data An Industry Standard for over fifty years. Linearity A Servo-Tek DC tachometer generator provides a Linearity at any speed is better than 0.1% of the convenient and economical means of converting output at that RPM. rotational speed into an isolated analog voltage signal suitable for remote indication and control. Bidirectional Operation While this catalog contains information on our All Servo-Tek tachometer generators operate in most popular models, we also manufacture either rotational direction. That direction can be countless special tach generators. determined by output voltage polarity. Output (in either direction) is held to a tolerance of 0.25% of Construction the average output. Most of our DC tach generators are housed in aluminum casings protected in accordance with Mil-C-5541 or Mil-A-8625 or high performance plastics. Alnico permanent magnets are used. Armature shafts are stainless-steel, and rotate on fully shielded stainless-steel ball bearings. Commutators are manufactured from an alloy containing at least 90% silver. Armature laminations are wound with Isomid insulated wire, over Teflon slot insulation. The entire armature is then baked, resulting in a NEMA Class H insulation system. SB-740A-2 Stability Optimum brush and commutator combination gives 0.1% stability. Highly stable output gives no evidence of long-term drift. Breakdown Voltage Servo-Tek DC tachometer generators are factory tested with an AC potential of 1250 volts RMS applied for one second between (either) terminal and shaft. E-Series units are tested with 500 volts. DA-7533A-2 Temperature Range Most of our DC tachometer generators Ripple are designed for continuous operation The ripple RMS value will not exceed 3% of the in ambient temperatures ranging from DC value at any speed in excess of 40 RPM on -55ºC to +100ºC. Voltage output at 25ºC will not standard units. On the low ripple units, the ripple deviate by more than 0.01% per degree of change RMS value will not exceed 1.5% of the DC value. within the range of -20ºC to +75ºC. All units are A peak to peak ripple of 1.5% is available on some temperature compensated, with the exception of models. D-Series and E-Series tach generators. 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com SERVO-TEK ® SERVO-TEK ® SERVO-TEK ® SERVO-TEK ® A-Series B-Series 1 to 10 volts/1000 RPM 11 to 24 volts/1000 RPM SB-757B-1 and SU-7346B-1 SA-757A-2 and SA-740A-2 SN-763A-2 A-Series Tachometer Generators B-Series Tachometer Generators Instrument Type: As is the case with the A-Series DC tachometer • 0.120 inch shaft diameter generator, the B-Series also comes in instrument • Small in size and industrial configurations. Depending on the • Ideally suited to instrumentation applications unit, the output voltage ranges between 11 and 24 V/1000 RPM. Electrical characteristics, ripple, Industrial Type: linearity and temperature effects are the same as • 0.187 inch shaft diameter the A-Series. • Special front-end bearings for radial loads • Ideal for pulley and belt drive applications Other shaft sizes and mounting configurations are available for most Servo-Tek generators. A-Series and B-Series Specifications Inertia Armature Armature Shaft Weight (Approx.) V/1000 RPM Resistance Inductance Outline Mounting Size 2 Model Number Mounting (Approx.) oz-in-sec RPM (max) (dynamic) (henrys) Dimensions Dimensions (in.) -4 SA-740A-7 Face 3.0 oz 1.32 x 10 2.6v 12,000 40Ω 0.024h Fig. 10 Fig. 1 .120 -4 SB-740A-7 Flange 3.0 oz 1.32 x 10 2.6v 12,000 40Ω 0.024h Fig. 10 Fig. 2 .120 -4 SA-740A-2 Face 3.0 oz 1.32 x 10 7.0v 12,000 350Ω 0.18h Fig. 10 Fig. 1 .120 -4 SB-740A-2 Flange 3.0 oz 1.32 x 10 7.0v 12,000 350Ω 0.18h Fig. 10 Fig. 2 .120 -4 SA-757A-2 Face 3.0 oz 1.32 x 10 7.0v 12,000 350Ω 0.18h Fig. 11 Fig. 1 .187 -4 SB-757A-2 Flange 3.0 oz 1.32 x 10 7.0v 12,000 350Ω 0.18h Fig. 11 Fig. 2 .187 -4 SA-740B-1 Face 4.0 oz 2.27 x 10 20.8v 8,000 1000Ω 0.56h Fig. 10 Fig. 1 .120 -4 SB-740B-1 Flange 4.0 oz 2.27 x 10 20.8v 8,000 1000Ω 0.56h Fig. 10 Fig. 2 .120 -4 SA-757B-1 Face 4.0 oz 2.27 x 10 20.8v 8,000 1000Ω 0.56h Fig. 11 Fig. 1 .187 -4 SB-757B-1 Flange 4.0 oz 2.27 x 10 20.8v 8,000 1000Ω 0.56h Fig. 11 Fig. 2 .187 Maximum Driving Torque for A-Series and B-Series is 0.25 oz-in Most units listed above are normally in stock 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com SERVO-TEK ® SERVO-TEK ® SERVO-TEK ® SERVO-TEK ® D-Series E-Series (Subminiature) 25 to 50 volts/1000 RPM .7 to 3 volts/1000 RPM SU-780D-1 SS-779E-1 D-Series Tachometer Generators E-Series Tachometer Generators With rugged construction and high output The E-Series DC tachometer generator is the voltages, the D-Series tach generator is ideally smallest tach generator among those offering suited to a variety of industrial applications. similar technical characteristics. Many outstanding features make it particularly The flange mounting arrangement provides a suitable for use in all types of servo systems. convenient assembly method, and the sturdy Although the diameter is only 0.760” the .187 shaft diameter permits the heavier loading E-Series provides up to 3 V/1000 RPM output. frequently encountered where pulleys or belt drives are employed. The output bearing is fitted Almost any Servo-Tek DC tachometer generator with a seal to help prevent the contamination that can be manufactured with special configurations, can occur in industrial applications. various electrical specs and shaft modifications such as flats, pinions, holes, etc. Consult sales With output up to 50V/1000 RPM, D-Series department regarding your special requirements. generators are ideal for applications where high output voltages are required. Typically, these are slow speed applications. D-Series and E-Series Specifications Inertia Armature Armature Shaft Weight (Approx.) V/1000 RPM Resistance Inductance Outline Mounting Size 2 Model Number Mounting (Approx.) oz-in-sec RPM (max) (dynamic) (henrys) Dimensions Dimensions (in.) -4 SU-780D-1 Flange 8.5 oz 4.54 x 10 45v 5,000 1750Ω 1.00h Fig. 10 Fig. 5 .187 -4 SU-7114D-1 Flange 8.5 oz 4.54 x 10 45v 5,000 1750Ω 1.00h Fig. 10 Fig. 5 .187 -4 SU-780D-2 Flange 8.5 oz 4.54 x 10 33v 5,000 950Ω 0.54h Fig. 10 Fig. 5 .187 -4 SS-779E-1 Synchro 1.25 oz 0.25 x 10 3v 12,000 180Ω 0.061h Fig. 12 Fig. 6 .120 Maximum Driving Torque for D-Series and E-Series is 0.25 oz-in Most units listed above are normally in stock 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com SERVO-TEK ® SERVO-TEK ® SERVO-TEK ® SERVO-TEK ® Low Ripple Units (F-Series, H-Series and J-Series) 1 to 30 volts/1000 RPM CS-7514F-51C and SA-7356F-1 SB-7483H-1 F-Series (1-8 volts/1000 RPM) H-Series (5-16 volts/1000 RPM) Servo-Tek low ripple DC tachometer generators The H-Series DC tachometer generators are low satisfy the need for a cost effective, very ripple units possessing all the same traits as the low ripple tachometer. In addition to being the F-Series, but with the B-length armature. This first economical low ripple units of their type, the means a slightly higher output voltage. F-Series tachometers incorporate all the desirable features of the standard units such as temperature J-Series (16-30 volts/1000 RPM) compensation, long brush life, excellent linearity, The J-Series DC tachometer generators are low and small dimensions. ripple units possessing all the same traits as the F-Series, but with the D-length armature. These The ripple voltage does not exceed 1.5% RMS generators are ideal for applications where high and 3.5% peak to peak at any speed in excess of output voltages with low ripple signals are required. 40 RPM on any F-Series, H-Series or J-Series DC tachometer generator. Other shaft sizes and mounting configurations are available. F-Series, H-Series and J-Series Specifications Inertia Armature Armature Shaft Weight (Approx.) RPM Resistance Inductance Outline Mounting Size 2 Model Number Mounting (Approx.) oz-in-sec V/1000 RPM (max) (dynamic) (henrys) Dimensions Dimensions (in.) -4 SA-7356F-1 Face 3.0 oz 1.14 x 10 7.0v ± 3% 12,000 500Ω 0.38h Fig. 10 Fig. 1 .120 -4 SA-7388F-1 Face 3.0 oz 1.32 x 10 7.0v ± 3% 12,000 500Ω 0.38h Fig. 10 Fig. 1 .187 -4 CS-7514F-51C Flange 3.0 oz 1.32 x 10 3.0v ± 3% 12,000 130Ω 0.061h Fig. 11 Fig. 3 .250 -4 SB-7483H-1 Flange 4.0 oz 1.96 x 10 16.0v ± 3% 8,000 800Ω 0.72h Fig. 11 Fig. 2 .187 -4 SU-780J-1 Flange 8.5 oz 4.54 x 10 30v ± 1% 5,000 1050Ω 1.00h Fig. 10 Fig. 5 .187 Maximum Driving Torque for F-Series, H-Series and J-Series is 0.25 oz-in at 25ºC Most units listed above are normally in stock 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com 1086 Goffle Road • Hawthorne, NJ 07506 • sales@servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com SERVO-TEK ® SERVO-TEK ® SERVO-TEK ® SERVO-TEK ® Sealed DC Tachometers Servo-Tek’s Ruggedized 1 to 45 volts/1000 RPM PY Alternative (Up to 50 volts) ST-7337A-2N and ST-7337B-1 ST-13212 and ST-12970 Sealed Tachometer Generators Ruggedized Tachometer Generators Servo-Tek manufactures a complete line of sealed Servo-Tek ruggedized DC tachometer generators units which are resistant against the harmful are designed with sturdy aluminum housings and effects of fluids. These units employ a one-piece strong mounting flanges. Other features offered housing, a special shaft seal, and a form-fitted include extra-heavy armature shafts and bearings. rubber boot on the terminal end. Servo-Tek sealed The mechanical flexibility of the ST-13212 allows units meet electrical specifications after storage at for the internal tachometer to be repaired or 49ºC with 95% relative humidity for 24 hours. replaced, without having to replace the expensive These units are capable of enduring vibration anodized casting. The ST-13212 supplies outputs with amplitudes up to 0.03” total excursion at from 2.6 to 50V/1000 RPM and runs at speeds frequencies from 4 Hz to 55 Hz in each of three up to 5000 RPM. The shaft size is 5/16” in mutually perpendicular axes with no evidence of diameter. The ST-12970 comes equipped with a physical damage. These units are available with a rubber coupling. It allows the unit to be driven low ripple output up to 30V/1000 RPM. by a motor shaft with 0.167” wide slot. The ST-12970 is also available with outputs up to 24V/1000 RPM and can run at high speeds. Sealed DC Tachometer Generator Specifications Inertia Armature Armature Shaft Weight (Approx.) V/1000 RPM Resistance Inductance Outline Mounting Size 2 Model Number Mounting (Approx.) oz-in-sec RPM (max) (dynamic) (henrys) Dimensions Dimensions (in.) -4 ST-7336A-7 Face 3.0 oz 1.32 x 10 2.6v 12,000 40Ω 0.024h Fig. 8 Fig. 8 .120 -4 ST-7336A-2 Face 3.0 oz 1.32 x 10 7.0v 12,000 350Ω 0.18h Fig. 8 Fig. 8 .120 -4 ST-7336B-1 Face 4.0 oz 2.27 x 10 20.8v 8,000 1000Ω 0.56h Fig. 8 Fig. 8 .120 -4 ST-7337A-2 Face 3.0 oz 1.32 x 10 7.0v 12,000 350Ω 0.18h Fig. 8 Fig. 8 .187 -4 ST-7337B-1 Face 4.0 oz 2.27 x 10 20.8v 8,000 1000Ω 0.56h Fig. 8 Fig. 8 .187 -4 SU-7346D-1 Flange 8.5 oz 4.54 x 10 45v 5,000 1750Ω 1.00h Fig. 8 Fig. 5 .187 Maximum Driving Torque for a sealed DC tachometer generator is 0.7 oz-in Most units listed above are normally in stock 1086 Goffl e Road • Hawthorne, NJ 07506 • sales@servotek.com Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com SERVO-TEK ® Overhung Tachometer 1 to 24 volts/1000 RPM ST-7565 Series Introducing Servo-Tek’s new low-cost overhung tachometer. This bearingless tach-generator is small in size and has a black delrin housing and end plate. Because the Servo-Tek overhung unit is self-generating and provides an analog output, it makes for an excellent alternative to the encoder. No D-A conversion will be necessary! Mounts easily using a 10-32 threaded shaft. No coupling or ST-7565A-2 mounting brackets will be required. Part Number: ST-7565A-2 Output Voltage: 7 VDC ± 5%, no load, per 1000 RPM at 25ºC Internal Resistance: 270 Ohms typical at 25ºC Ripple: 5% RMS of DC output voltage at speeds over 40 RPM Linearity: 0.1% max., 0 to 4000 RPM Bidirectional Output: 0.5% of nominal output in both CW and CCW directions Polarity: Red wire positive with CCW rotation viewing shaft end Temperature Coeffi cient: 0.05% per ºC of nominal output at 25ºC from -20ºC to 50ºC Accessories Other Products Rubber Couplings ST50 Optical Encoder ST-9502-1 fi ts .120 The ST50, a 2 inch shafts and ST-9502-2 hollow shaft encoder, fi ts .187 shafts. The accepts motor shafts tapered tang is molded from .236 to .625 inches to fi t a straight slot OD. It combines 3 phase 0.167”±.005” wide and brushless commutation 3/16” deep. pulses, 2 data channels ST-9502 and reference index pulse ST50 in a single package. Flexible Couplings ST20 Optical Encoder ST-9776 fi ts shaft The ST20, a 2 inch shaft diameters of up to .375 encoder, is a low cost, shafts. They may be heavy duty solution to ordered in any mixed or digital feedback. This matched confi guration. unit is available in single When ordering, please or dual channel with specify both hole sizes. nearly unlimited mounting ST-9776 ST20 patterns. Request a Servo-Tek RC-800 catalog for our complete product line of encoders. Mounting and Outline Dimensions Figure 1 SA Face Mount Figure 2 SB Flange Mount Figure 3 SD Modified Synchro Figure 4 SM Aircraft Mount Figure 5 SU Large Flange Mount Figure 6 SS Synchro Mount Figure 7 Aircraft Configuration Figure 8 Sealed Configuration Figure 9 Flat Shaft Configuration Model # “L” Model “L” “F” “P” “N” “S” Model “L” “E” “F” “N” “S” ST-7336A 1.867 OMIT OMIT OMIT 0.120 ± .001 XX-7114B 2.193 0.562 0.437 0.157 0.187 ± .001 SM-762A 2.520 ST-7336B 2.304 OMIT OMIT OMIT 0.120 ± .001 XX-7114D 3.253 0.562 0.437 0.157 0.187 ± .001 SM-762B 2.957 ST-7337A 1.875 0.375 0.062 0.157 0.187 ± .001 XX-7146A 1.701 0.562 0.437 0.110 0.120 ± .001 ST-7337B 2.312 0.375 0.062 0.157 0.187 ± .001 XX-7346D 3.633 0.375 0.062 0.157 0.187 ± .001 Figure 10 Instrument/Industrial Configuration Figure 11 Industrial Configuration Figure 12 E-Series Tachometers Model # “L” “F” “P” “N” Model # “L” “F” “P” “N” “S” Model # “T” “L” “E” “S” XX-740A 1.701 OMIT OMIT OMIT 0.120 ± .001 XX-757A 2.240 0.375 0.062 0.157 SS-779E 1.687 1.479 0.375 ± .015 0.1200 ± .0005 XX-740B 2.138 OMIT OMIT OMIT 0.120 ± .001 XX-757B 2.677 0.375 0.062 0.157 SS-7251E 1.687 1.479 0.562 ± .015 0.1870 ± .0002 XX-780B 2.193 0.375 0.062 0.157 0.187 ± .001 XX-796B 2.677 OMIT OMIT OMIT XX-780D 3.253 0.375 0.062 0.157 0.187 ± .001 XX-7483H 2.677 0.375 0.062 0.157 XX-797A 1.701 0.187 0.187 0.110 0.120 ± .001 XX-7103A 1.756 0.375 0.062 0.157 0.187 ± .001 XX-7107D 3.253 OMIT OMIT OMIT 0.187 ± .001 Servo-Tek Products Company • 1086 Goffle Road • Hawthorne, NJ 07506 XX-7123A 1.756 OMIT OMIT OMIT 0.187 ± .001 Phone (973) 427-3100 • Fax (973) 427-4249 • www.servotek.com XX-7123B 2.193 OMIT OMIT OMIT 0.187 ± .001 Specifications subject to change without notice XX-7356F 1.701 OMIT OMIT OMIT 0.120 ± .001 Copyright © 2003 Servo-Tek Products Company XX-7360F 1.756 0.375 0.062 0.157 0.187 ± .001