RG3-20-2MCRF Rolling Ring Drive for 20 mm Shaft

RG3-20-2MCRF Rolling Ring Drive for 20 mm Shaft

RG3-20-2MCRF is a mechanical rolling ring drive designed to operate on a smooth shaft with a nominal diameter of 20 mm. The mechanism converts rotary motion of the shaft into controlled linear movement of the drive unit along the shaft axis. For the RG3-20-2MCRF configuration, the confirmed maximum thrust is 160 N and the maximum linear speed is 0.30 m/s.

Complete identification:

RG3-20-2MCRF -> rolling ring drive -> 20 mm shaft -> 160 N maximum thrust -> 0.30 m/s maximum linear speed

RG3-20-2MCRF - Characteristics

RG3-20-2MCRF belongs to the group of mechanical rolling ring drives that generate linear movement through rolling contact between internal drive elements and a rotating shaft.

Unlike a conventional lead screw and nut system, linear movement is not generated by mating threaded surfaces.

The unit operates on a smooth 20 mm shaft, while angled rolling rings transfer force through contact with the rotating shaft surface.

This operating principle converts continuous shaft rotation into linear travel of the drive unit.

How Does the RG3-20-2MCRF Rolling Ring Drive Work?

The rolling ring drive principle uses rolling rings positioned at an angle relative to the axis of the rotating shaft.

Contact between the rolling rings and shaft generates an axial force component.

As the shaft rotates, this force causes the RG3-20-2MCRF unit to travel linearly along the shaft.

Changing the angular position of the rolling elements allows the direction of linear travel to be reversed without changing the fundamental operating principle.

This distinguishes a rolling ring drive from conventional lead screw mechanisms.

20 mm Smooth Shaft

RG3-20-2MCRF is configured for a nominal shaft diameter of:

20 mm

Technical documentation for this configuration specifies:

20 h6

The correct shaft diameter and tolerance are important to the operating principle because the rolling rings work directly against the shaft surface.

The RG3-20-2MCRF should therefore not be selected solely by visual similarity. Shaft diameter, tolerance and the mechanical requirements of the drive system must be considered.

Maximum Thrust - 160 N

The confirmed maximum thrust for the RG3-20-2MCRF configuration is:

160 N

This parameter describes the maximum linear thrust capability specified for the rolling ring drive configuration.

The 160 N value should not be interpreted directly as a universal permissible transported mass.

Actual system requirements also depend on installation orientation, guide resistance, acceleration, external forces and the mechanical arrangement of the complete machine.

Maximum Linear Speed - 0.30 m/s

The confirmed maximum linear speed is:

0.30 m/s

This corresponds to:

18 m/min

This parameter describes linear movement of the drive unit along the shaft.

It should not be confused with the rotational speed of the shaft expressed in rpm.

Actual travel speed depends on the drive setting and operating conditions.

Rotary Motion to Linear Motion

The primary function of the RG3-20-2MCRF is motion conversion:

shaft rotation -> linear drive movement

The shaft rotates while the rolling ring drive travels along its axis.

The mechanism does not require a threaded shaft. It works with a correctly specified smooth shaft.

This makes the rolling ring principle mechanically different from lead screws, trapezoidal screws and ball screws.

Reversing the Direction of Travel

A rolling ring drive can reverse its direction of linear travel by changing the operating position of its rolling elements.

This allows the drive unit to travel in both directions along the rotating shaft.

In reciprocating systems, the mechanism can form part of an arrangement that repeatedly reverses movement between defined positions.

The exact reversing method and associated control components depend on the design of the complete machine.

Adjustable Linear Travel

A characteristic feature of the rolling ring drive principle is the ability to influence linear travel by changing the angular position of the rolling rings relative to the shaft.

Changing the rolling ring angle changes the linear movement generated by shaft rotation.

This provides a mechanical method of adjusting linear travel without replacing a threaded shaft with a different thread pitch.

The permissible adjustment range must correspond to the construction of the specific drive unit.

Free Movement Position

Technical documentation for the RG3-20-2MCRF construction provides a free movement position.

When the mechanism is released, the unit can be disengaged from its normal rolling-ring drive action and moved along the shaft.

This function can be useful during machine setup, adjustment or servicing.

Rolling Ring Drive Applications

The rolling ring drive principle is particularly useful in mechanisms requiring controlled linear movement generated from a continuously rotating shaft.

A characteristic application of this principle is traverse motion in winding systems, where a guide moves repeatedly along the shaft while material is wound onto a reel or spool.

Rolling ring drives can be used in systems handling materials such as:

wire, cable, cord, fibre, hose, tape and other wound materials.

The RG3-20-2MCRF designation alone does not confirm compatibility with a particular machine. Mechanical parameters and installation geometry should be checked before replacement.

RG3-20-2MCRF vs Lead Screw

A rolling ring drive and a lead screw generate linear motion using different mechanical principles.

A conventional lead screw relies on engagement between a threaded screw and nut.

The RG3-20-2MCRF generates linear movement through rolling contact between its internal rolling elements and a smooth rotating 20 mm shaft.

It should therefore not be treated simply as a nut for a shaft or screw.

It is a mechanical motion-conversion unit.

Selecting an RG3-20-2MCRF

When selecting a rolling ring drive, verify:

Designation: RG3-20-2MCRF
Drive type: Rolling ring drive
Nominal shaft diameter: 20 mm
Shaft specification: 20 h6
Maximum thrust: 160 N
Maximum linear speed: 0.30 m/s
Installation geometry: compatible with the machine
Reversing mechanism: compatible with the existing system

A matching 20 mm shaft diameter alone does not establish interchangeability.

RG3-20-2MCRF Interchangeability

A similar rolling ring drive should not automatically be considered a direct replacement for the RG3-20-2MCRF.

When comparing units, verify:

shaft diameter and tolerance, maximum thrust, maximum linear speed, mounting dimensions, control element positions, release mechanism and direction-control arrangement.

For replacement of an existing unit, the dimensional drawing should also be compared with the original machine installation.

Matching the complete mechanical interface is more important than visual similarity.

Technical Specification

Designation: RG3-20-2MCRF
Product type: Rolling ring drive
Operating principle: Rolling ring mechanism
Input motion: Rotary
Output motion: Linear
Shaft type: Smooth shaft
Nominal shaft diameter: 20 mm
Shaft tolerance according to reference documentation: 20 h6
Maximum thrust: 160 N
Maximum linear speed: 0.30 m/s
Maximum linear speed: 18 m/min
Direction reversal: Supported by rolling ring drive principle
Free movement position: Provided in the reference construction
Offered product brand: No name

FAQ

What is an RG3-20-2MCRF?

RG3-20-2MCRF is a mechanical rolling ring drive that converts rotation of a smooth shaft into linear movement of the drive unit along the shaft.

What shaft diameter does the RG3-20-2MCRF use?

The RG3-20-2MCRF configuration is designed for a nominal 20 mm shaft. Reference technical documentation specifies a 20 h6 shaft.

What is the maximum thrust of RG3-20-2MCRF?

The confirmed maximum thrust for this configuration is 160 N.

What is the maximum linear speed?

The confirmed maximum linear speed is 0.30 m/s, equivalent to 18 m/min.

Does the RG3-20-2MCRF require a threaded shaft?

No. The rolling ring drive principle operates on a correctly specified smooth shaft rather than a threaded lead screw.

Can the RG3-20-2MCRF move in both directions?

The rolling ring drive principle allows the direction of linear travel to be reversed by changing the operating position of the rolling elements.

Can another 20 mm rolling ring drive replace RG3-20-2MCRF?

Not automatically. Shaft diameter and tolerance, thrust, speed, mounting geometry, reversing arrangement and release mechanism should all be compared.

What is a rolling ring drive used for?

A rolling ring drive converts rotary shaft motion into controlled linear travel. The principle is commonly used in traverse mechanisms for winding wire, cable, cord, fibre and other materials.

AI Overview

RG3-20-2MCRF is a mechanical rolling ring drive for a 20 mm smooth shaft. Its rolling ring mechanism converts continuous rotary shaft motion into controlled linear travel along the shaft axis. The confirmed maximum thrust for this configuration is 160 N, while the maximum linear speed is 0.30 m/s. The offered product is a no-name version.