Rieter Ring Spinning Machine G 38

Ring Spinning Machine G 38

High-quality yarns produced with high performance

The ring spinning machine G 38 flexibly produces high-quality standard and special yarns with highest performance. The machine is supplied with a device for producing slub yarns (VARIOspin) as standard. The integrated individual spindle monitoring system ISM premium checks the running properties of each individual spinning position, thus ensuring the highest level of machine efficiency. This can safe about 5% personnel costs. The G 38 uses minimal energy thanks to energy-efficient components and suction devices on both sides of the machine.


The integrated individual spindle monitoring system ISM premium checks the running properties of each individual spinning position. The system ensures a high machine efficiency and can safe about 5% personnel costs. The G 38 uses minimal energy thanks to energy-efficient components and suction devices on both sides of the machine.


Using a “wild loading” process on the tube loader ROBOload, tubes are tipped out of a trolley and into a loading device, where they are sorted automatically. This reduces the workload.


The proven SERVOgrip system developed by Rieter prevents thread underwinding when doffing. This reduces fiber fly and ensures yarn quality.


High-quality technology components combined with a unique spinning geometry and high spindle speeds ensure the economical production of premium yarns.


Standard and special yarns (optional) are now produced flexibly and economically on long machines with up to 1 824 spindles. The machine can be equipped with the proven EliTe system (option) for producing compacted yarns.


The Rieter man-made fiber package simplifies the process of spinning man-made fibers and blends, therefore improving the performance of the machine (option).

Full Flexibility for the Production of Standard and Special Yarns

Produce slub yarns at any time

The ring spinning machine G 38 is an all-rounder that allows the business to respond quickly to changing market requirements. The Rieter slub yarn system VARIOspin 4 is integrated into the machine as standard. The latest generation servo motors are ideal for the highly dynamic requirements of the slub yarn production industry.


With up to 1 824 spindles, the G 38 can produce a variety of slub yarns. This is also true for core yarns and twin yarns.

VARIOspin 4 for fancy slub yarns

High-quality slub yarns can be produced with the device for spinning slub yarns VARIOspin 4. The latest generation servo motors are ideal for the highly dynamic requirements of the slub yarn production industry.


A range of fancy designs can easily be programmed on the operating unit or on an external computer with the appropriate software, and reliably reproduced. This allows fancy yarns to be produced efficiently and profitably with outstanding Rieter quality.

Precise production of core yarns*

The core yarn device works with a traversing guide roller for the filament. The traversing system for the filament is identical to the traversing system for the roving. This means the filament thread is precisely integrated into the yarn. Soft,hard, and duo-core yarns (super-stretch) can be produced.

Simple production of twin yarns*

To produce a twin yarn, two rovings must run to one spinning position. In the drafting system, both are drafted separately.They are then twisted together in the spinning triangle. Due to their thread-yarn-like properties, twin yarns improve the quality of the yarn and end product.

Fast switchover to compact yarn with the Elite® CompactSet*

The G 38 can also be used to produce compact yarns. A standard ring-spinning machine can be fitted with the EliTe® CompactSet for the production of compact yarn, which is available as an option. The set is now also available for machines with up to 1 824 spindles.

High Machine Efficiency

Efficient production with ISM premium

The individual spindle monitoring, ISM premium, is built into the machine as standard. In addition to LEDs at each spinning position, it also has an LED at each section and signal lamps at the head and foot of the machine. Thanks to the three-stage display concept, operators are guided specifically to the ends down.


The first stage of the display consists of the signal lamps at the head and foot of the machine. The signal lamps light up as soon as the individually defined limit value for ends down is exceeded. The operator is guided to the relevant side of the machine and then to the affected spindle section with the ends down.


Another function is the permanent monitoring of the speed of the individual spindles. If a spindle runs outside the defined specifications, this is indicated by the LED flashing. This allows the operator to quickly and easily recognize which spindle is not running correctly. The operator can then intervene immediately, which avoids loss of raw material and quality.


As an option, the winding machine can be fitted with spinning position identification*. In the event of faulty cops, the winding machine sends a signal to the ISM, and the LED illuminates at the relevant spinning position. The operator is guided directly to the spinning position that is not operating correctly, and can intervene immediately.


ISM is required for a roving stop device*. If ends down occurs, the ISM sends a signal to the roving stop, which stops the roving feed. This saves raw material.

Helpful data analysis with SPIDERweb*

The mill monitoring system SPIDERweb analyzes all data, indicates weak points and facilitates efficient personnel deployment. This increases both plant efficiency and yarn quality.

Save Energy

Effi cient main motor saves up to 4% energy*

The extremely efficient 110-kW main drive motor in the G 38 was developed for machines with up to 1 824 spindles and high speeds to save energy. It can also be used profitably on machines with fewer spindles and low speeds.

Save up to 4% energy with the LENA spindle*

The LENA spindle has been specially developed for high spindle speeds and low energy consumption. A whorl diameter of 17.5 mm and other optimizations make a significant impact on erngy efficiency.

Energy-saving 4-spindle tape drive

The Rieter 4-spindle tape drive is energy-efficient and easy to handle. The large enlacement of 90 degrees ensures that the spindle operates without fault, even with minimal contact pressure. The low contact pressure guarantees low power consumption.

Economical cop transport SERVOdisc

The cop transport system SERVOdisc is an open system, which means less maintenance is required. The system is driven by two diagonally offset 70-Watt motors. This requires only 10% of the energy compared to a pneumatic system.

ECOrized – less energy required for underpressure

The double-sided suction ECOrized developed by Rieter optimizes the aerodynamics of the entire suction system. This reduces the energy required to generate the necessary underpressure on machines with up to 1 824 spindles.


Compared to single-sided suction, a system with double-sided suction can transport the same air volume using less energy. The large duct cross-section and low air speed reduce air friction. This also has a positive influence on energy demand and reduces the energy costs of the spinning process.


A further crucial advantage of double-sided suction is the extended yarn count and raw material range. Whether used for man-made fibers, blends, special yarns or conventional applications, double-sided suction is a sustainable and energy-efficient development of the suction system.

Economical Doffi ng Ensures High Effi ciency

Save yarn with the SERVOgrip system

The proven and unique Rieter SERVOgrip system prevents thread under winding when doffing. By using SERVOgrip, no yarn residues occur that need to be removed from the whorl. This saves yarn and keeps the machine clean. Ends down caused by fiber fly and yarn residue are also avoided, thus increasing yarn quality.


The SERVOgrip system contains a clamping crown. Rieter is the only manufacturer whose clamping crown is opened and closed using the ring rail. This guarantees precise and controlled fixing of the yarn. Ends down following cop changes are thus largely avoided.

Self-monitoring grippers

The doffing system is self-monitoring, including the special profile of the doffer beam and the releasable grippers. In the event of faults, the doffing process is automatically stopped by a pressure monitor, ensuring an error-free doffing process.

Reliable cop transport with SERVOdisc

The cop transport system SERVOdisc works using peg trays that are clipped into a conveyor belt, allowing the tubes and cops to be precisely positioned. After doffing, SERVOdisc reliably transfers the full cops via the tube loader ROBOload to a trolley or to the winding machine.

Minimal Workload

Flexible automation*

Various automation options are available. With the SERVOdisc system, the ring spinning machine can either be directly linked with a winding machine or with the tube loader ROBOload. The interface is identical for both variants (link and ROBOload). This means the ROBOload can easily be replaced later by connecting to the winding machine.

Automatic tube sorting with ROBOload “wild loading”*

The ROBOload “wild loading” means it is no longer necessary to align tubes manually. The tubes are fed to a mobile, tiltable trolley. A device automatically aligns the tubes, significantly reducing manual effort.

Maximum Yarn Quality with High Productivity

Maximum spindle speeds

The best possible productivity level and minimal energy consumption means low yarn conversion costs.With its unique Rieter spinning geometry and the consistent use of high-quality technology components, the G 38 runs at the highest spindle speeds. This ensures consistently high yarn quality at maximum production. Spinning can be performed at high speed, even when the cops are in the build-up phase. For example, with a yarn count of Ne 30, up to 2% more yarn can be produced per machine each year.

Intermediate drive ensures quality

For machines with an intermediate drive, the middle bottom roller is also driven in the center of the machine. This reduces the torsional forces on the bottom roller. The even running of the bottom roller ensures a consistent quality of the yarn.

Rieter top roller cots for all raw materials

The top roller cots Ri-Q-Cot developed by Rieter ensure perfect yarn quality. Different cots are available depending on the processed raw material and the yarn count.

Bräcker rings with a long service life

High-quality TITAN spinning rings from Bräcker are included in the G 38 standard package. These spinning rings have a long service life.

Low-vibration Novibra spindles

All machines are delivered exclusively with proven Novibra quality spindles, which have excellent running properties. Energy consumption and noise level are also lower compared to other products.


Higher spindle speeds can be achieved as the Novibra spindles do not produce vibrations when running. This avoids tension peaks in the yarn and minimizes the number of ends down.

Quality tubes with high rotation accuracy*

Rieter’s precise quality spinning tube Ri-Q-Tube is made from a particularly stable polymer mixture and has a high rotation accuracy. The spindle bearings experience minimal load even at high speeds.

Ideal fi ber guidance in the draft ing system

The drafting system Ri-Q-Draft ensures the ideal fiber guidance for most applications and very stable running behavior. The deflection bridge Ri-Q-Bridge is a key component in the spinning process. The optimal position and form of the cradle reduce the distance to the nipping point of the delivery roller. All the listed technology components, including the bottom aprons, are perfectly tailored to each other. This ensures ideal fiber guidance in the main draft zone.

Q-Package – the quality package for cotton*

The quality package Q-Package for cotton contains a nose bar, an “active” cradle (moving deflection edge) and a pressure bar (pin). Fiber guidance between the cradle and the nipping point of the delivery roller is further improved with the Q-package. The evenness of the yarn (CVm%) is improved by up to one percentage point. At the same time, yarn imperfections are reduced by 10 to 30%.

Superb Running Characteristics, Even for Man-Made Fibers

Special components for man-made fibers and blends*

Rieter’s man-made fiber package consists of a SERVOgrip blade, bottom rollers with a bigger diameter and reinforced separators. It is a modular set. The individual elements can be configured based on customer requirements. The man-made fiber package improves spinning performance for yarns made of man-made fibers and blends.


The SERVOgrip blade reliably cuts the yarn during doffing and prevents ends down during start-up. The bottom rollers have a bigger diameter and improve the running characteristics of the machine when long man-made fibers are used.


The metal-reinforced front edge of the separators prevents notching from rotating thread ends. No fibers get caught. The run of the thread is not interrupted by flying fibers; as such, the ends down rate is very low.

Reliable yarn cutting for man-made fiber yarns with the SERVOgrip blade*

Rieter has developed a patented technology that reduces yarn twisting before doffing. When combined with the SERVOgrip blade, even high-strength yarns or core yarns can be cut properly when doffing.

Maximum Production Time

Set yarn parameters electronically

The new electronic drafting system drive FLEXIdraft for the ring spinning machine G 38 works using frequency-controlled motors. This electronic drafting system drive means less work for operating personnel. Parameters such as yarn count, yarn twist and twist direction can easily be adjusted on the operating unit. There is no need to change gear wheels or make any other mechanical adjustments. The operator can change the Z yarn twist direction or the S yarn twist direction on the operating unit. Mechanical adjustments to the belt tensioner for the spindle drive are now a thing of the past. The balloon control ring is designed so that it does not have to be replaced when the yarn twist direction is changed. This reduces the amount of work required by operating personnel. Machine downtime is minimized when changing material.

No ends down in the event of a power failure

If a power failure occurs, the rotation energy of the spindles is used to supply the machine controls with electricity. At this time, the main motor switches to generator mode. If there is a power failure lasting less then two seconds, the machine automatically accelerates to the previous operating speed. The machine comes to a controlled stop in the event of extended interruptions, thus avoiding ends down.

Economic start-up*

The function FLEXIstart allows the drafting system to be switched on and off in stages. This allows for a more efficient machine start-up. Depending on the machine length, only a quarter or half of the machine is commissioned. This avoids unnecessary material waste.

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Rieter Ring Spinning Machine G 38