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Home  >>  Products  >>  Dispersion  >>  Laboratory Stirring Systems & Precision Stir-Testers
Laboratory Stirring Systems

G. K. Heller stirring systems offer a wide range of features and capabilities including: G.K. Heller stirrers filter the drive current for better performance featuring:
  • Feedback circuitry on all models to maintain speed even when viscosity changes
  • Standard horsepower ratings from 1/40 to 1/4 horsepower. Has 50/60 Hz operation
  • A selection of propellers & paddles from 1-1/2" to 6" diameter
  • Reference circuitry maintains speed even with voltage fluctuations of ±10%
  • Cord connections between drive motors & controls increase convenience & allow placement away from hostile environments
  • This filtering process eliminates the objectionable pulsing action common to unfiltered DC current
  • Reduces motor heating
  • Allows the use of a smaller motor for the same power rating
  • Ensures smooth rotation for precise stirring
  • Lengthens motor brush life
  • Prevents demagnetization of permanent-magnet motor fields

 

GT31 Stirring System

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A favorite with chemists and lab technicians everywhere. Totally enclosed, 1/40 hp, permanent magnet motor with two output shafts for maximum speeds of 4,000 and 333 rpm. The armature shaft provides high speeds for mixing light materials, while the geared shaft generates 3.6 lb. - in. (4.2 kg-cm) of torque at slower speeds for stirring more viscous mixtures. Continuously variable speed control.

The GT31 stirring system is furnished complete with motor and mounting bracket, controller, and the following accessories:

GT31
  • MX-A210101 3-jaw, keyless chuck
  • MX-A210106 paddle
  • MX-A210107 propeller
  • MX-A283040 right angle clamp
Lab stand, MX-A130150, is recommended to mount the GT31 but not included with the System.

 

GT24 Stirring System

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Combines today's permanent-magnet motor technology with solid state electronics. Totally enclosed, 1/17 hp, cool, and quiet-running motors with direct-drive and geared options. Models available with speeds up to 2,500 rpm and torques up to 12 lb. - in. (13.8 kg-cm). Continuously variable speed control.

The GT24 stirring system is furnished complete with motor, mounting bracket, controller, and the following accessories:

GT24
  • MX-A210106 paddle
  • MX-A210107 propeller
  • MX-A210101 3-jaw keyless chuck (with GT24N and GT224N only)
  • MX-A260108 3-jaw keyless chuck and arbor (with GT2406, GT22406, GT2412 and GT22412 only)
  • MX-LC300 heavy-duty 90° clamp
Lab stand, MX-A130150, is recommended to mount the GT24 but not included with the System.

 

ST-20 Stirring System

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A powerful stirring outfit. Totally enclosed, 1/8 hp, cool, quiet-running, permanent magnet motor in direct and gear-drive models with torques from 3.1 lbs.- in. (3.57 kg-cm) to 96 lb. - in. (111 kg-cm). Provides a stirrer with more power than the 6T60 and a selection of speed ranges up to 2,500 rpm. Continuously variable speed control.

The ST20 stirring system is furnished complete with motor and mounting bracket, controller, and the following accessories:

ST-20
  • MX-A260100 3-jaw, keyless chuck and arbor for ST20N and ST220N only
  • MX-A260200 3-jaw, keyless chuck and arbor for ST20 geared models
  • MX-A260106 propeller
  • MX-LC300 heavy-duty 90° clamp
Lab stand, MX-A130150, is recommended to mount the ST-20 but not included with the System.

 

Prices

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Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Catalog No. Motor Type Input Voltage Max. rpm Torque Prices
lb-in. kg-cm
GT31 1/40 hp Stirring System
MX-GT31 Dual-shaft 18:1 gearmotor 120 333/4,000 3.6/.26 4.2/.3 $1,013.00
MX-GT331 Dual-shaft 18:1 gearmotor 240 333/4,000 3.6/.26 4.2/.3 1,129.00
GT24 1/17 hp Stirring System
MX-GT24N Single-shaft, direct drive 120 2,500 1.5 1.7 $1,081.00
MX-GT2406 Single-shaft 6:1 gearmotor 120 417 5.4 6.2 1,313.00
MX-GT2412 Single-shaft 12:1 gearmotor 120 208 12 13.8 1,313.00
MX-GT224N Single-shaft, direct drive 240 2,500 1.5 1.7 1,158.00
MX-GT22406 Single-shaft 6:1 gearmotor 240 417 5.4 6.2 1,411.00
MX-GT22412 Single-shaft 12:1 gearmotor 240 208 12 13.8 1,411.00
ST-20 1/8 hp Stirring System
MX-ST20N Single-shaft, direct drive 120 2,500 3.1 3.57 $1,770.00
MX-ST2004 Single-shaft 4:1 gearmotor 120 660 6 6.9 1,830.00
MX-ST20 Single-shaft 9:1 gearmotor 120 266 21 24.2 1,830.00
MX-ST2021 Single-shaft, 20:1 gearmotor 120 125 46 53 1,830.00
MX-ST2044 Single-shaft 44:1 gearmotor 120 57 96 111 2,002.00
MX-ST220N Single-shaft, direct drive 240 2,500 3.1 3.57 1,842.00
MX-ST22004 Single-shaft 4:1 gearmotor 240 660 6 6.9 1,997.00
MX-ST220 Single-shaft 9:1 gearmotor 240 266 21 24.2 1,997.00
MX-ST22021 Single-shaft 20:1 gearmotor 240 125 46 53 1,997.00
MX-ST22044 Single-shaft 44:1 gearmotor 240 57 96 111 2,187.00

 

 

Precision Stir-Testers

Dust on Steel Assessment Equipment & Test for Cleanliness and CTR Laboratory stirring speed and torque measurement is easier and more precise with the Glas-Col/G.K. Heller HST Series stir testers:
  • Actual speeds are displayed and maintained by a synthetic tachogenerator. (Speed is kept within less than 1% of the base speed from no load to more than 100% of full load regardless of AC line voltage fluctuations of ±10%.)
  • Viscosity measurement is easier thanks to a controller with a digital readout switchable between speed and torque.
  • Data on shear stress, shear rate, velocity gradients, and viscosity is accumulated easily with external DC voltage signals for speed and torque (for strip or X-Y recorders) available through an output port on the rear of the control.
  • Operator convenience and safety is increased with cord connections between drive motors and controls to allow control placement away from hostile environments.

 

HST10 Series Stir-Tester

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Totally enclosed, 1/17 hp, permanent-magnet DC motor. Direct-drive model provides 20 to 2,500 rpm and 1.5 lb-in. torque (1.73 kg-cm). The HST10 is available in direct-drive and geared models in 6:1 and 12:1 ratios for max. speeds/torques of 417 rpm/5.4 lb-in. (6.2 kg-cm) and 208 rpm/12.0 lb. - in. (13.8 kg-cm) respectively.

The HST10 includes the drive motor with mounting bracket, controller, and the following accessories:

HST10
  • MX-A210101 3-jaw keyless chuck and arbor (with HST10N and HST210N)
  • MX-A260108 3-jaw keyless chuck and arbor (for HST10 geared motors)
  • MX-A210106 paddle
  • MX-A210107 propeller
  • MX-LC300 heavy duty 90° clamp
Lab stand, MX-A130150, is recommended to mount the HST10 but not included with the System

 

HST20 Series Stir-Tester

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1/8 hp, totally enclosed, permanent-magnet DC motor. Direct-drive model provides speeds up to 2,500 rpm and 3.6 lb. - in. (3.6 kg-cm) of torque. Geared model HST20 gives 2 to 266 rpm and torque of 21 lb. - in. (24.2 kg-cm).Other models provide torques up to 96 lb. - in. (111 kg-cm).

The HST20 offers the outputs and speed maintaining capability of the HST10 series along with increased stirring power for more difficult laboratory applications.

The HST20 includes the drive motor with mounting bracket, controller, and the following accessories:

HST20
  • MX-A260100 3-jaw keyless chuck and arbor (HST20N and HST220N only)
  • MX-A260106 propeller
  • MX-LC300 heavy duty 90° clamp
  • MX-A260200 3-jaw keyless chuck and arbor for HST20 geared motors
Lab stand, MX-A130150, is recommended to mount the HST20 but not included with the System

 

HST30 Series Stir-Tester

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1/4 hp, totally enclosed, permanent-magnet DC motor. Direct drive model provides speeds up to 2,500 rpm and 6.3 lb. - in. (7.3 kg-cm) of torque for more viscous applications. A variety of gearing options allow for even higher torque output (up to 90 lb. - in.) without putting undue stress on the motor.

The HST30 includes the motor with mounting bracket, controller, and the following accessories:

HST30
  • MX-A260108 3-jaw keyless chuck and arbor (with HST30N and HST230N)
  • MX-A260275 3-jaw keyless chuck and arbor (for HST30 geared motors)
  • MX-A260106 propeller
    MX-LC300 heavy duty 90° clamp
Lab stand, MX-A130150, is recommended to mount the HST30 but not included with the System

 

Prices

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Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Catalog No. Motor Type Input Voltage hp Max RPM Torque Prices
lb-in. kg-cm
HST10 1/17 hp Series Stir-Tester
MX-HST10N Direct drive; rpm/torque readout & X-Y output 120 1/17 2,500 1.5 1.73 $1,900.00
MX-HST1006 Similar to HST10N but with 6:1 gearmotor 120 1/17 417 5.4 6.22 1,900.00
MX-HST1012 Similar to HST10N but with 12:1 gearmotor 120 1/17 208 12.0 13.8 1,900.00
MX-HST210N Direct drive; rpm/torque readout & X-Y output 208-240 1/17 2,500 1.5 1.73 2,112.00
MX-HST210-6 Similar to HST210N but with 6:1 gearmotor 208-240 1/17 417 5.4 6.22 2,425.00
MX-HST210-12 Similar to HST210N but with 12:1 gearmotor 208-240 1/17 208 12.0 13.8 2,425.00
HST20 1/8 hp Series Stir-Tester
MX-HST20N Direct drive; rpm/torque readout & X-Y output 120 1/8 2,500 3.6 3.57 $2,432.00
MX-HST20-4 Similar to HST20N but with 4:1 gearmotor 120 1/8 660 6 6.9 2,440.00
MX-HST20 Similar to HST20N but with 9:1 gearmotor 120 1/8 266 21 24.2 2,440.00
MX-HST20-21 Similar to HST20N but with 21:1 gearmotor 120 1/8 125 46 53 2,440.00
MX-HST2044 Similar to HST20N but with 44:1 gearmotor 120 1/8 57 96 111 2,601.00
MX-HST220N Direct drive; rpm/torque readout & X-Y output 208-240 1/8 2,500 3.6 3.57 2,479.00
MX-HST220-4 Similar to HST220N but with 4:1 gearmotor 208-240 1/8 660 6 6.9 2,751.00
MX-HST220 Similar to HST220N but with 9:1 gearmotor 208-240 1/8 266 21 24.2 2,751.00
MX-HST220-21 Similar to HST220N but with 21:1 gearmotor 208-240 1/8 125 46 53 2,751.00
MX-HST220-44 Similar to HST220N but with 44:1 gearmotor 208-240 1/8 57 96 111 2,803.00
HST30 1/4 hp Series Stir-Tester
MX-HST30N Direct drive; rpm/torque readout & X-Y output 120 1/4 2,500 6.3 7.3 $2,612.00
MX-HST3005 Similar to HST30N but with 5:1 gearmotor 120 1/4 500 25 28.8 2,789.00
MX-HST3010 Similar to HST30N but with 10:1 gearmotor 120 1/4 250 45 51.8 2,790.00
MX-HST3020 Similar to HST30N but with 20:1 gearmotor 120 1/4 125 90 103.7 2,790.00
MX-HST230N Direct drive; rpm/torque readout & X-Y output 240 1/4 2,500 6.3 7.3 2,671.00
MX-HST23005 Similar to HST30N but with 5:1 gearmotor 240 1/4 500 25 28.8 2,836.00
MX-HST23010 Similar to HST30N but with 10:1 gearmotor 240 1/4 250 45 51.8 2,836.00
MX-HST23020 Similar to HST30N but with 20:1 gearmotor 240 1/4 125 90 103.7 2,836.00


Accessories

Heavy-Duty 90-Degree Clamp

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This new clamp provides secure, reliable, and easy support of lab equipment. The 90-Degree Clamp is designed to be easier and more user-friendly than most common laboratory clamps.

Equipment adjustments that used to take three hands, pliers, and lots of patience can now be done easily in a few seconds. The triangular knobs fit comfortably in the hand and are large enough so that hand tightening applies sufficient pressure to hold rods securely. Both knobs are located on the same side of the clamp so that switching hands or awkward hand positions during equipment adjustments are eliminated. The Heavy-Duty Clamp may be used on conventional round support rods from 1/2" to 3/4" diameter. It is especially designed for use with the new antirotational octagonal rods.

Clamp

 

Propellers & Paddles

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Propellers

 

Collets & Chucks

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Chucks Chucks


Lab Stands, Motor-Mounting Brackets & Clamps

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Lab Stand

 

Prices

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Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
MX-LC300 Heavy-duty 90-Degree Clamp $114.00
Item No. Item Shaft Length Prices

Propellers

MX-A260106 Heavy-duty, stainless steel, 3-bladed propeller 6" (152 mm) diameter on 1/2" diameter (12.7 mm dia) shaft 12 in (305 mm) $285.00
MX-A210107 Stainless steel, 3-bladed propeller 1-1/2" (38 mm) diameter on 5/16" diameter shaft with MX-A210105 5/16" (7.9 mm) coupling 8-3/4 in (222 mm) 108.00
MX-A210119 12 in (305 mm) 134.00
MX-A210121 18 in (457 mm) 129.00
MX-A100103 Stainless steel, 4-bladed propeller 1-1/2" (38 mm) diameter on 1/4" diameter (6.4mm) shaft 9 in (229 mm) 100.00
MX-A100104 12 in (305 mm) 103.00
MX-A100105 18 in (457 mm) 112.00
MX-A130153 Stainless steel, 4-bladed propeller 2" (50.8 mm) diameter on 1/4" diameter (6.4 mm) shaft 9 in (229 mm) 116.00
MX-A130154 306 in (12 mm) 129.00
MX-A130155 18 in (457 mm) 133.00
Paddles
MX-A210106 Stainless steel, 3-bladed paddle 2-1/2" (63.5mm) diameter on 5/16" diameter (8mm) shaft with MX-A210105 5/16" (8mm) coupling 8-3/4 222 116.00
MX-A210109 12 305 134.00
MX-A210120 18 457 168.00
MX-A219106 MX-A210106 paddle with Teflon coating 8-3/4 222 189.00

Collets and Chucks

MX-A210101 3-jaw keyless chuck with arbor for 5/16" (8mm) motor shaft 3/8 in (9.5 mm) $145.00
MX-A260100 Precision 3-jaw keyless chuck w/arbor for 3/8" (9.5mm) motor shaft 1/2 in (12.7 mm) 282.00
MX-A260108 Precision 3-jaw keyless chuck w/arbor for 1/2" (12.7 mm) motor shaft 283.00
MX-A260200 Precision 3-jaw keyless chuck w/arbor for 5/8" (15.9 mm) motor shaft 283.00
MX-A260275 Precision 3-jaw keyless chuck w/arbor for 3/4" (19 mm) motor shaft 283.00
Flexible Shafts
MX-A210312 for 5/16" (8mm) shaft, 5/16" end fitting 36 in (914 mm) 579.00
MX-A260375 for 3/8" (9.5mm) shaft, 5/16" end fitting 463.00
MX-A260500 for 1/2" (12.7mm) shaft, 5/16" end fitting 36 1,084.00
MX-A260625 for 5/8" (15.9mm) shaft, 5/16" end fitting 1,188.00
Lab Stands, Motor-Mounting Brackets & Clamps
MX-L70 Horseshoe-base laboratory stand with 11/16" (17mm) diameter aluminum mast. Accepts containers up to 9" (229mm) diameter. 24 in (610 mm) $262.00
MX-A130150 Heavy-duty lab stand with 3/4" (19mm) diameter nickel-plated mast. Cast iron base with 1/2" 13 threaded holes for additional rods. Accommodates containers up to 16" (406mm) diameter. Weight, 12 lbs. (5.4 kg) 30 in (762 mm) 300.00
MX-A283040 Right-angle clamp, for up to 3/4" (19mm) diameter rods. Motor-mounting bracket with rod for HST20 series motor. 8 in (203 mm) 60.00
MX-A280104
Miscellaneous Accessories
MX-A052060 Plug and extension cable for X-Y output of HST10 and HST20 36 914 76.00



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