Used Pfauter RS Gear Hobbing Machines for Sale 5

Advantages of Buying Used Pfauter RS Gear Hobbing Machines

Acquiring a used Pfauter RS gear hobbing machine provides gear manufacturers, industrial maintenance shops, and contract gear producers with proven large-capacity hobbing technology at substantially reduced capital investment compared to new CNC gear hobbing equipment.

Established German Engineering Reputation

Pfauter, founded in Ludwigsburg, Germany, built a long-standing reputation in the gear machine tool industry as a manufacturer of precision gear hobbing, gear grinding, and gear shaping machines. The RS series reflects the engineering standards of German machine tool construction with heavy cast iron frames, precision ground guideways, and carefully engineered gear trains providing the kinematic accuracy that gear production requires. Used RS machines that have been properly maintained retain the dimensional stability and mechanical precision that characterize their original construction.

Large Workpiece Capacity Accessible on the Secondary Market

The RS-3 model accommodates gear blanks up to 2,000 mm in diameter with module capacity up to 18, a specification range that on new CNC equipment commands significant capital investment. Used RS-3 machines in secondary market condition offer this large-diameter and large-module capability to gear shops and industrial manufacturers who require occasional large gear production without the commitment required for new machine procurement. For manufacturing departments producing large replacement gears for existing machinery, industrial drives, or infrastructure equipment, a used RS machine may provide sufficient capacity at appropriate cost.

Universal Flexibility for Diverse Gear Types

The RS series universal configuration cuts spur gears, helical gears, splines, sprockets, and worm wheels from a single machine setup with appropriate hob selection and change gear configuration. The universal swiveling hob head accommodates the helix angles of helical gear production, while the differential mechanism generates the required helical lead during cutting. This versatility allows a single used RS machine to serve diverse gear production requirements without machine-specific limitations on gear type, making the RS series well suited to job shops and maintenance departments where gear variety rather than volume defines production requirements.

Long-Established Service Support and Manual Availability

Pfauter RS machines have been in industrial service for decades, resulting in a well-documented service history with operator manuals, parts lists, and technical documentation available through multiple sources including industrial manual suppliers and machine tool dealers. Change gear calculation methods are well understood by experienced gear machine operators, and the mechanical systems of RS machines — being conventional gear-train kinematic designs — are accessible to skilled maintenance personnel without specialized software or proprietary diagnostic systems. This serviceability profile reduces support dependency for buyers integrating RS machines into production environments.

Complete Change Gear Sets as Operational Assets

Used RS machines are frequently offered with complete or near-complete sets of change gears, which represent significant operational value as they enable the full range of gear ratios required for cutting different numbers of teeth and helical leads without separate gear procurement. Buyers should confirm change gear completeness before purchase, as incomplete sets may require custom gear fabrication or sourcing to restore full operational capability. Complete change gear sets with original machine documentation enhance both operational readiness and secondary market value.

Main Technical Features of Pfauter RS Machines

Understanding the verified technical characteristics of the Pfauter RS series helps buyers assess suitability for specific gear production requirements and confirm compatibility with workpiece sizes, module ranges, and gear types in their production program.

Vertical Spindle Orientation

Pfauter RS machines employ a vertical spindle architecture in which the workpiece table rotates about a vertical axis and the hob head travels vertically along a column. This orientation facilitates workpiece loading, particularly for large heavy gear blanks that are more readily handled on a horizontal table surface than in a horizontal chuck configuration. The vertical layout also supports the use of an outboard support or tailstock for long gear shafts and pinions requiring additional support during cutting. Swarf and coolant drain away from the workpiece naturally under gravity, supporting cleaner cutting conditions on the vertical table arrangement.

Universal Hob Head with Helix Angle Swivel

The RS series hob head swivels to accommodate the helix angles required for helical gear cutting. Verified data from secondary market listings and manufacturer sources confirms a maximum helix angle of 60° on RS-3 configurations, accommodating the helix angles encountered in standard industrial helical gear production. The hob head swivel is set manually and locked for each cutting operation, requiring the operator to calculate and set the appropriate combination of hob head swivel angle and differential change gears for each helical gear job.

Change Gear Kinematic Drive System

RS series machines use conventional change gear kinematic systems to synchronize workpiece rotation with hob rotation, table axial feed, and differential lead generation for helical gears. This mechanical approach requires the operator to calculate and install the correct change gear combinations for each workpiece tooth count, module, helix angle, and cutting feed. Change gear calculation follows established gear hobbing formulas documented in machine manuals. While this setup process is more time-consuming than CNC parameter entry, the mechanical kinematic system is inherently robust and transparent in operation, and experienced gear hobbing operators are familiar with RS-type change gear procedures.

Differential Gearbox for Helical Gear Production

A differential gearbox is incorporated in the RS kinematic chain to generate the additional workpiece rotation required for helical gear cutting beyond the basic indexing rotation. The differential change gears are calculated from the required helical lead and installed by the operator as part of helical gear setup. For spur gear production, the differential drive shaft is locked to disable differential action, simplifying setup to indexing change gears and feed change gears only. Secondary market RS machines should have the differential mechanism inspected for proper operation before helical gear production is committed.

Tangential Hob Shifting

Tangential hob shifting capability is confirmed on RS-3 configurations, with tangential travel of 150 mm documented in secondary market listings. Hob shifting distributes cutting wear progressively along the hob length rather than concentrating wear at a fixed hob position, extending hob service life between resharpening cycles. This capability is particularly valuable when cutting harder materials or large modules where hob wear rate is elevated and extended hob life between sharpening operations directly reduces tooling costs and hob changeover downtime.

Robust Cast Iron Frame Construction

RS series machines are built on heavy cast iron frames providing the structural mass and damping characteristics that large-module hobbing requires. The mass and rigidity of the RS frame structure resist the cutting forces generated during heavy module gear cutting, maintaining the relative accuracy between hob axis and workpiece axis that gear quality depends on. Cast iron construction also provides thermal stability benefits compared to lighter fabricated steel structures, contributing to dimensional consistency during extended cutting operations on large gear blanks.

Pfauter RS Series Models and Variants

RS-2

The Pfauter RS-2 is the smaller model in the RS series, accommodating gear blanks up to approximately 910 mm diameter without tailstock and up to approximately 500 mm diameter with tailstock support, with maximum module 8 and table diameter of 705 mm. Hob spindle speeds on the RS-2 range from approximately 35 to 180 RPM and total installed power is approximately 7.8 kW. The RS-2 targets medium-diameter gear production in gearbox manufacturing, power transmission component production, and industrial maintenance applications where the RS-3's large-diameter capacity exceeds requirements. Used RS-2 machines appear on secondary markets in India, Europe, and Asia, and the model is frequently offered with full change gear sets in serviceable condition.

RS-3 and RS-3V

The Pfauter RS-3 is the most widely referenced model in the RS series on the secondary market, accommodating gear blanks up to 2,000 mm diameter with maximum module up to 18, hobbing length of 650 mm, table diameter of 970 mm, and maximum hob cutter diameter of 210 mm. Hob spindle speeds of 29 to 114 RPM are documented across multiple RS-3 listings, and machine weight is approximately 8,500 to 11,000 kg depending on configuration. Maximum helix angle is 60° and minimum tooth count is 12. Main motor power of 7.5 kW and total power of approximately 8 kW are verified from secondary market and dealer specifications.

The RS-3V variant designates variable-speed hob spindle drive as distinct from the stepped-speed arrangement of the standard RS-3, providing continuous hob speed adjustment across the operational range rather than fixed speed steps through gearbox selection. Variable speed capability facilitates optimization of cutting speed for different materials and module combinations without being constrained to discrete fixed speeds. Secondary market RS-3V listings confirm the same table diameter of 970 mm and maximum module 15 to 16 depending on configuration.

RS-9 and RS-9K

The Pfauter RS-9K is a horizontal configuration variant within the RS family, distinct from the vertical RS-2 and RS-3 models. The RS-9K accommodates maximum working diameters of approximately 300 mm with module capacity up to 10 and center distance of 870 mm. The horizontal orientation serves different workpiece geometry requirements compared to the vertical RS-3, particularly for shaft-type gear components and pinions where horizontal support is preferred. Used RS-9K machines are less commonly encountered on secondary markets than RS-3 variants but do appear in global dealer inventories.

Industries and Applications

Pfauter RS gear hobbing machines serve industrial sectors where large-diameter, high-module cylindrical gear production defines the manufacturing requirement.

Industrial Gearbox Manufacturing

Gearbox manufacturers producing speed reducers, multipliers, and torque converters for industrial drives, process machinery, mining equipment, and material handling systems represent a primary application sector for RS-3 class machines. Large industrial gearboxes require spur and helical gears in the diameter ranges the RS series accommodates, with module values reflecting the torque transmission requirements of heavy industrial drives. The RS series universal configuration supports the gear variety typical of industrial gearbox production where different ratio stages require different gear geometries from the same machine.

Power Transmission Component Production

Manufacturers of couplings, drive shafts, sprockets, and power transmission components use RS machines for producing the toothed elements — including splines, sprockets, and gear teeth — that transmit torque between shafts in industrial drive systems. The RS series compatibility with spline hobbing and sprocket cutting extends its applicability beyond pure gear production to the broader range of tooth-form components found in power transmission assemblies.

Heavy Machinery and Equipment Manufacturing

Manufacturers of construction equipment, agricultural machinery, mining machinery, and lifting equipment produce large gears for final drives, slewing rings, travel drives, and winch mechanisms in the diameter ranges served by the RS-3. Replacement gear production for existing heavy machinery — where original gears are no longer available from OEM sources — frequently requires universal gear hobbing capability on machines capable of the relevant module and diameter, making used RS machines a practical resource for equipment rebuilders and maintenance shops serving heavy industry.

Marine and Offshore Engineering

Marine propulsion system manufacturers, offshore equipment producers, and shipyard maintenance operations require large cylindrical gears for propulsion shafts, steering systems, deck machinery, and winch drives. The RS-3's capacity for gear diameters up to 2,000 mm and module up to 18 accommodates the larger gear elements found in marine drive systems. Marine gear production typically involves steel alloys with specific heat treatment requirements, and the RS series cutting capability handles the alloy steels and stainless grades used in marine environments.

Wind Energy Component Manufacturing

Wind turbine gearbox manufacturers and repair facilities use large gear hobbing capacity for producing the planetary and helical gear stages in wind turbine drive trains. Replacement gear production for aging turbine gearbox fleets requires the large-diameter and large-module hobbing capability the RS-3 provides. As wind turbine installed capacity ages and gearbox overhaul demand increases, gear shops equipped with large-capacity hobbers serve the repair and replacement market for turbine drive train components.

Railway and Transportation Engineering

Railway maintenance facilities, locomotive rebuild shops, and rail infrastructure manufacturers produce wheel gears, axle gears, traction motor gears, and final drive components in the medium-to-large diameter ranges appropriate to RS series machines. Railway gear specifications typically require specific DIN or ISO quality grades achievable on properly maintained and calibrated RS machines, and the helical gear capability of the RS series accommodates the helical teeth common in railway traction drive gear stages.

Industrial Maintenance and Repair Operations

Plant engineering departments, industrial maintenance workshops, and equipment repair contractors use universal gear hobbers to produce replacement gears for existing machinery where original spare parts are unavailable, lead times are unacceptable for production continuity, or custom modifications to existing gear designs are required. The RS series universal flexibility — covering spur gears, helical gears, splines, and sprockets across a wide module and diameter range — makes a single used RS machine a versatile resource for maintenance-focused gear production that cannot be served by purpose-built production hobbers with narrower operational ranges.

Pricing Factors for Used Pfauter RS Machines

Multiple variables influence the secondary market value of used Pfauter RS gear hobbing machines. Understanding these factors helps buyers assess whether available equipment represents appropriate value for their specific production requirements.

Model and Workpiece Capacity

The RS-3 and RS-3V command different secondary market positions from the RS-2 due to their substantially larger workpiece diameter and module capacity. Within the RS-3 family, the V-variant designation (variable hob speed) reflects a feature level above the basic RS-3, which is reflected in valuations where machines are comparable in other respects. Buyers should confirm exact capacity specifications against specific machine serial number documentation rather than relying on model designation alone, as individual machines may vary from nominal specifications due to configuration differences or earlier modifications.

Condition and Mechanical State

The mechanical condition of the hob spindle bearings, worktable worm gear, guideway surfaces, and differential gearbox directly determines the gear quality achievable on a used RS machine. Table rotation accuracy, hob spindle runout, and column guideway straightness are the critical accuracy parameters for gear hobbing quality. Buyers should request documentation of any recent inspection, guideway scraping, bearing replacement, or gear train service performed on machines under consideration. Visual inspection of guideway surfaces for scoring, bearing wear evidence at spindle housings, and backlash in the table worm gear drive provides initial condition indicators before detailed metrology assessment.

Completeness of Change Gear Sets

A complete change gear set is operationally essential for an RS series machine to perform its full intended capability range. Missing change gears restrict the tooth counts, helical leads, and feed rates achievable without custom gear procurement, which may involve significant cost and lead time for non-standard gear dimensions. Sellers should provide a complete inventory of change gears with any RS machine offered for sale, and buyers should verify completeness against the machine's original change gear table before purchase commitment.

Control and Drive Updates

Some used RS machines have been retrofitted with digital readout systems, variable frequency drives for hob spindle speed control, or other modernization updates that improve operational convenience relative to original all-mechanical configuration. These updates may extend operational relevance and improve setup accuracy, contributing positively to valuation where the specific updates address operational limitations of the base machine configuration.

Geographic Location and Logistics

Large RS machines — particularly the RS-3 at approximately 8,500 to 11,000 kg — involve significant logistics costs for transport, rigging, and installation. Buyers should factor transportation and installation costs into total acquisition cost calculations when comparing machines at different geographic locations, as substantial logistics differentials can materially affect the effective cost comparison between seemingly similar machines offered at different prices from different locations.

How to Select the Right Pfauter RS Machine

Define Maximum Gear Diameter and Module Requirements

Establish the maximum gear blank diameter and maximum module in your anticipated production program before evaluating specific RS machines. These two parameters define whether the RS-2 or RS-3 class is appropriate and whether RS series machines in general serve your capacity requirements. Confirm that the target machine's maximum diameter and maximum module both accommodate your largest required workpiece with adequate margin, as operating at the extreme limits of machine capacity reduces achievable quality and increases cutting force demands on machine structure.

Confirm Gear Type Requirements Against Machine Capability

Verify that the specific RS machine under consideration supports all gear types required in your production program. Confirm helix angle swivel range against your maximum required helix angle for helical gears. Verify that the differential mechanism is present and functional if helical gear production is required. Confirm that the tangential hob shift mechanism is operational if extended hob life on heavy cuts is important to your economics. Spur gear production only requires simpler machine capability than helical production, and buyers producing only spur gears may not require all features present on fully equipped RS machines.

Verify Change Gear Set Completeness

Request a complete inventory of change gears supplied with any RS machine under consideration and verify against the machine's original change gear calculation tables for the full range of tooth counts, feed rates, and differential leads required in your production program. Identify any gaps in the change gear set and obtain quotations for custom gear fabrication or sourcing before finalizing acquisition cost assessment. Machines offered with full original change gear sets and documentation are generally preferred over machines with incomplete sets unless the specific gear jobs require only a limited subset of ratios.

Arrange Physical Inspection by a Qualified Gear Machine Technician

Engage a technician experienced with conventional gear hobbing machines to perform physical inspection including table worm gear backlash measurement, hob spindle runout check, guideway condition assessment, and operational test under power with a sample cut if possible. The internal condition of the differential gearbox and change gear housings should be assessed during inspection. Obtain the results of any inspection in documented form to support acquisition decision making and identify any remedial work required before production quality can be achieved.

Assess Facility Requirements for Installation

Confirm that the installation location provides adequate floor load capacity for RS machine weight — approximately 8,500 to 11,000 kg for the RS-3 — adequate overhead crane capacity for rigging during installation and for workpiece handling during production, adequate electrical supply matching machine specifications, coolant drainage, and chip removal provisions. Large gear hobbing operations generate substantial metal chips and cutting fluid volume, and chip management infrastructure should be planned as part of installation preparation rather than addressed after machine commissioning.

Buy Used Pfauter RS Gear Hobbing Machines on Exapro

Explore the current selection of used Pfauter RS gear hobbing machines available on Exapro and connect directly with verified sellers offering equipment for large-diameter cylindrical gear production in gearbox manufacturing, power transmission, heavy industry, marine engineering, and industrial maintenance applications. Access detailed machine specifications, review condition information, confirm change gear set completeness, and contact sellers to discuss technical requirements and logistics planning for your next gear hobbing investment.