NOTE! For Certified Dimensions contact the Factory!  Data on this site is for information only.

Specifications For Partial-Turn
 Worm Gear Operators

Definition

All operators in this series are Commercial Grade, have worm gearing, and have positive stops field adjustable from 0 to180 degrees. Operators listed have bores, keyways, and mounting dimensions as listed on the individual operator envelope dimensional drawings. Operators are assembled in position II (clockwise input results in clockwise output), and have one shop coat of black primer. Operator pricing does not include hand wheels.

Construction

Unit housings and covers are cast iron, worm wheels are ductile iron with the exception of the DT3 and DT7 which are powdered metal, worms are heat-treated carbon steel, input shafts are carbon steel with yellow zinc coating, shaft and worm seals are Buna-N rubber, housing to cover seals are styrene butadiene, bushings are oil impregnated copper nickel steel alloy, and stop parts are carbon steel.

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Installation and Operation Manual

Model

Unit Wgt. LBS.

Max. Output Torque Lb.-In.

Gear Ratio

Turns for 180 Deg.

Std. Output Bore

Std. Key Size

Sq.

Std. Mounting Pattern

Mech. Adv.

HDW Size

Inches

Approx Rim Pull Lbs.

Qty. & Size

Bolt Circle

 

DT3

7

4,500

30:1

15

1.000

.250

(4)3/8-16

3.250

8.10

14

80

DT8

19

8,000

30:1

15

1.750

.375

(4)1/2-13

5.000

8.10

24

82

DT12

26

16,000

57:1

28.50

2.000

.375

(4)1/2-13

4.921

13.68

30

78

DT16

33

16,000

44:1

22

2.750

.250

(4)5/8-11

6.000

11.44

36

77

DT21

34

26,000

60:1

30

2.500

.500

(4)5-8-11

5.512

22.5

30

77

DT36

78

36,000

53:1

26.50

3.250

.750

(4)3-4-10

6.496

19.00

36

105

DT50*

105

50,000

212:1

106

3.250

.750

(4)3/4-10

6.496

60.80

20

80

DT54*

108

63,000

318:1

159

3.250

.750

(4)3/4-10

6.496

91.20

18

77

 

*Indicates units with spur assist.

Notes:

1. Handwheels listed are recommended sizes to produce full rated torque with the rim effort listed. The formulas listed below will assist you in determining alternate handwheels sizes and rim pull requirements based on your application.

To Find: Handwheel diameter for given output torque at a given rim effort.

Divide the output torque by the mechanical advantage and multiply the result by 2.

Then divide this result by the handwheel rim effort.

To Find: Rim effort for a given output torque with a given handwheel diameter.

Divide the output torque by the mechanical advantage and multiply the result by 2.

Then divide this result by the handwheel diameter.                        

Note:  Handwheels are not included as part of the operator part list or price.

 

2. Bore, keyways, and mounting patterns listed are for DynaTorque standards. Please consult factory for special bore treatments, costs, and deliveries.

 

ISO 9001 CERTIFIED

 
3. Standard mounting patterns on the DT3 through the DT54 are (4) tapped holes straddling centerline at 45 degrees.