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Electronic Components

Crameda Intersys AG Tel. +41-44-884 11 60 Handy +41-79-635 18 87 Getriebe-E-060915.doc Pumpwerkstrasse 23 Fax +41-44-870 07 59 Page : 1 CH-8105 Regensdorf · Schweiz http://www.crameda.com

Data Sheet Continuous Speed Variators

Features and characteristics

Outstanding features of the speed variators Wide range of control Low control torque The speed can be regulated either during operation or

when at a standstill Small control angle The control spindle can be mounted at the driving or the

driven shaft side Accurate repeatability of the desired speed Stable speed output independent of load variations Small dimensions due to compact design Coaxial driving and driven shafts Ball pressure varies with output torque Extremely smooth running High efficiency Long service life

Available types The following types are available: Size 10 15 25 35 Range of control 10:1 20:1 20:1 11:1 Control torque (Nm) 0,07 0,1 0,2 0,25

Output, shaft-end design and flanges comply with IEC-standards.

Regulation The speed or speed ratio setting may be read from the regulator dial. The control spindle of speed variator drives with integral motor is supported by the motor bearing end bracket. With separate speed variators, however, the control spindle must be provided with an additional support outside the variator shaft.

Remote control of speed The speed variators may be remote-controlled by means of an actuator and a control unit. Please ask for the special documentation.

Driving motors As a standard, asynchronous motors of protection type IP44 are supplied. Motors up to protection type ExeC for use in explosive gas atmospheres may be provided. The motor bearings do not require any particular maintenance in operation. Motors and speed variators are connected with an elastic coupling.

Operating position The speed variators are designed for operation in horizontal position.

Mounting Separate speed variators as well as speed variator drives with integral motor are designed for horizontal mounting, either with or without a mounting base plate. Face mounting types with IEC-flanges are available.

Lubricant Monsanto Santotrac 50 (synthetic lubricant)

Accessories and reduction gears Please ask for our special documentation on optional attachments, such as control devices with dial, oil gauge glasses, couplings, IEC-flanges.



Principle of operation and features of speed variators The torque is transmitted from the driving shaft via the driving side thrust assembly, the driving side ball race, the four steel balls, the driven side ball race and the driven side thrust assembly to the driven shaft. The control spindle is rigidly connected to the control worm and cannot be moved axially. The control worm is in mesh with the four roller shift wheels with external teeth, which in turn are supported in the stationary roller carrier held by the roller carrier disk. The centers of the roller shift wheels, control rollers and steel balls are situated in one plane and are stationary. The steel balls are centered by the four control rollers supported in the roller shift wheels, and the two ball races. The two thrust assemblies press the ball races against the steel balls. The thrust assemblies consist of two thrust collars, three pressure balls with springs providing the basic ball pressure. The broad thrust collars are rigidly centered on the two ball race supports, but are axially movable. These supports may rotate to a limited extent on the driving and driven shafts respectively. The driving and driven shafts are both supported in the roller carrier and in the variator housing. The narrow thrust collars are rigidly mounted on the two shafts, but are axially movable as well. Each thrust collar carries three individual grooves for the pressure balls, with decreasing depth in both directions of rotation. As long as the speed variator is on no-load, the balls remain at the deepest point of the grooves.

With increasing driving torque, the pressure balls climb along the groove slope, exerting an axial force proportional to the torque. Turning the control spindle will vary the inclination of the control roller axles, resulting in a variation of the speed of the driven shaft. The inclination of the rotary axes of the steel balls is determined by the inclination of the rotary axes of the control rollers. This fact permits a variation of the perimeter ratio of the driving and driven side rolling circles on the steel balls. The theoretical rotary axes of the control rollers and the steel balls always intersect at one point on the theoretical axis of the speed variator. However, if the control roller axles are parallel to the variator axis, the output speed will be identical to the input speed, the two rolling circles being equal. If the control roller axles are inclined toward the axis of the driving shaft, the output speed will decrease with increasing inclination of the control roller axles, the driving side rolling circle growing larger, and that on the driven side becoming smaller. If the control roller axles are inclined toward the axis of the driven shaft, the output speed will increase in relation to the input speed. All rolling parts are hardened and ground. High precision and an excellent surface quality guarantee silent operation, low working temperatures, high efficiency and perfect interchangeability of all moving parts.



Technical Data

Speed variators

Speed range rev./m

Max torque Nm

Control angle

Degrees

Max driving speed rev./m

Approx. housing

dimensions mm

Oil volume

cm3

Approx weight

kg

Position of control spindle Ordering ref.

200-2000 0.3 324 2000 62Ø x 110 30 1 Input side

Output side H10A Type A H10A Type B

150-3000 1.0 573 1500 120Ø x 174 75 7.5 Input side

Output side H15D Type A H15D Type B

150-3000 4.8 690 1500 160Ø x 230 125 18 Input side


200-2200 10.0 890 1500 200Ø x 292 400 30 Input side


Types H15D, H25D and H35D are optionally available with IEC flange. Mounting base plate optionally available.

Speed variator drives with integral motor

Motor characteristics Speed range

rev./m Max torque

Nm

Control angle

Degrees rev./m kW

Approx. housing

dimensions mm

Oil volume

cm3

Approx weight

kg

Position of control spindle Ordering ref.

130-1300 0.3 324 2000 0.05 87Ø x 235 45 4 Input side

Output side HM10A Type A/4HM10A Type B/4

270-2700 0.3 324 2700 0.075 87Ø x 235 45 4 Input side

Output side HM10A Type A/2HM10A Type B/2

140-2800 1.0 573 1400 0.18 129Ø x 384 75 15 Input side

Output side HM15D Type A HM15D Type B

140-2800 4.8 690 1400 0.75 160Ø x 505 125 33 Input side


200-2200 10 890 1400 1.5 200Ø x 612 400 60 Input side


Types HM15D, HM25D and HM35D are optionally available with IEC flange. Crameda Intersys AG stands for a worldwide spare part and repair service, comprehensive maintenance instructions and expert advice concerning your driver problems.



Control, torque and power characteristics

Control characteristics

Speed variators


Torque characteristics

Speed variators


Power characteristics

Speed variators


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