Rieter Compact-Spinning Machine K 48

Compact-Spinning Machine K 48

Fully Compacted Yarns Produced with High Performance

The compact-spinning machine K 48 produces fully compacted standard and special yarns with highest performance. It is supplied with a device for producing slub yarns as standard. The machine uses up to 25% less energy in comparison to other compact-spinning machines.


The integrated individual spindle monitoring system ISM premium checks the running properties of each individual spinning position and enables efficient machine supervision. This ensures a high level of machine efficiency and can safe about 5% personnel costs.


The K 48 only requires around 20% of the compacting energy needed by other comparable solutions. This is achieved thanks to the unique compacting system and the energy-efficient components.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 maintenance costs for the machine are low as the system does not include a compacting apron and is equipped with technology components with long service lifes.


Parameters such as yarn count, twist and twist direction can be easily changed on the operating unit thanks to an electronic drafting system drive. This maximizes production time.With the tube loader ROBOload “wild loading” tubes are tipped out of a trolley and into a loading device, where they are sorted automatically. This reduces the work involved.


The air-guide element Detect ensures precise air guiding and monitors the compacting process at each individual spinning position. This ensures a consistently high yarn quality.

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


The K 48 is very flexible. The machine is supplied with a device for producing slub yarns (VARIOspin) as standard. Systems for producing core yarns and ply yarns are also available on request.

An improved coating on the sieve drum enables various raw materials to be spun. This expands the application range of the K 48.

Save Energy

Energy saving of up to 25%

The compact-spinning machine K 48 can achieve an energy saving of up to 25% compared to other spinning machines with a comparable production volume. This results from combining an energy-saving basic machine, a unique compacting system, the new, efficient 110-kW motor and the LENA spindle.

Very low energy consumption for compacting

The K 48 only requires around 20% of the compacting energy in comparison to other solutions. This is thanks to a unique compacting system and energy-efficient technology components. The one-duct system for suction reduces the energy consumption needed to generate underpressure. The large cross-section of the suction duct reduces air resistance. This is just one of the measures that keeps energy consumption low.

Uniform underpressure

Machines with an intermediate drive feature a suction unit on both the head and foot of the machine. The speed of the air flow is reduced and the underpressure level along the K 48 becomes more uniform and energy-efficient.

The air-guide element Detect covers the compacting zone. As a result, the air flow is directed in a targeted manner, significantly reducing the air flow rate required for compacting. The air-guide element Detect also contributes to the reduction in energy consumption.

Save up to 4% energy with the LENA spindle*

The LENA spindle has been specially developed for high spindle speeds and low energy consumption. The whorl diameter is only 17.5 mm. This results in an energy saving of up to 4%.

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 every spindle operates without fault, even with minimal contact pressure.

Efficient main motor saves up to 4% energy*

The extremely efficient 110-kW main drive motor in the K 48 was developed for machines with up to 1 824 spindles and high speeds in order to save energy. It can also be used profitably on machines with fewer spindles and low speeds.

Energy-effi cient cop transport

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 solution.

Full Flexibility for Special Yarns

Produce slub yarns at any time

The compact-spinning machine K 48 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.

A range of effect designs can easily be programmed on the operating unit or an external computer using the software provided and reliably reproduced. This allows effect yarns to be produced efficiently and profitably with outstanding Rieter quality. With up to 1 824 spindles, the K 48 can produce a variety of slub yarns. This is also true for core yarns and twin yarns.

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 and compacted 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.

High Machine Efficiency

Efficient production with ISM premium

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.

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.

Wide Range of Raw Materials for Fully-Compacted, High-Quality Yarn

Basis for a wide range of applications

A sieve drum with minimal maintenance is the a basis for a long-term consistent yarn quality. The low-wear surface of the sieve drum ensures a good and above all uniform yarn quality over long operating periods. The improved surface coating of the sieve drum means that the K 48 is even capable of processing blends of various raw materials. The machine can therefore be used in a broader range of applications.

Controlled compacting

The compacting unit forms the heart of the compact-spinning machine. The compacting unit comprises the sieve drum, suction insert Bright, and air-guide element Detect. The optimal shape of the air guide element and suction insert ensures that the drawn-in air is guided in a targeted manner.

The fibers to be spun are neatly and continuously incorporated into the yarn body via the air flow drawn in at the sides. The targeted air routing in the compacting unit prevents dust and fiber particles from being deposited inside the machine. By doing so, the machine is always able to produce fully compacted yarn with the highest strength and low hairiness.

Simple quality monitoring

The new air-guide element Detect monitors the air flow at the individual spinning positions. If the underpressure reaches a limit value, a red marking on the air guide element indicates that the compacting unit must be checked. This feature prevents non-compacted yarn being produced. Monitoring each individual spinning position guarantees a consistently high yarn quality.

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.

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%.

Ideal fiber guidance in the drafting 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 the form of the cradle reduce the distance to the nipping point of the delivery roller. These technology components, including the bottom aprons, are perfectly tailored to each other. This ensures ideal fiber guidance in the main draft zone, guaranteeing consistently high yarn quality.

Economical Doffi ng Ensures High Effi ciency

Save yarn with the SERVOgrip system

The proven and unique Rieter SERVOgrip system enables doffing without underwinding. By using SERVOgrip, no yarn remnants 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 remnants is also avoided, thus increasing yarn quality.

The SERVOgrip system comprises a special 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 is 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 to the tube loader ROBOload or to the winding machine.

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

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

Highest Level of Productivity at Lowest Maintenance Costs

Maximum spindle speeds

With its unique Rieter spinning geometry and the consistent use of high-quality technology components, the K 48 runs at the highest spindle speeds. These high speeds ensure maximum production with a consistently high yarn quality. For example, with a yarn count of Ne 30, up to 10% more yarn can be produced per machine each year.

Productivity is more than maximum spindle speed

Production can be increased even when the cops are in the buildup stage. The precise machine design of the K 48 and the use of high-quality components allow the machine to run at higher starting speeds. Such speeds can increase production rates, especially in the lower end of the cop size range. The maximum spindle speed is reached quicker. At a yarn count of Ne 30, for example, it is therefore possible to produce an additional 6 500 kilograms of yarn on each machine each year.

Low spinning costs

With the K 48 the labor-intensive and expensive exchange of compacting aprons is not needed. Machine downtimes are avoided. Increased efficiency can be achieved as a result, making it simpler to plan production.

Maximum Production Time

Set yarn parameters electronically

The new electronic drafting system drive FLEXIdraft for the compact-spinning machine K 48 uses 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.

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, a quarter or half of the machine is comissioned. This avoids unnecessary material waste.

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 than 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.

Minimal Workload

Flexible automation

Various automation options are available. With the SERVOdisc system, the compactspinning 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 the machine in a mobile, tiltable trolley. A device automatically aligns the tubes, significantly reducing manual effort.

Advantages for Downstream Processing

Better effi ciency of the weaving machine

High strength and low hairiness are important factors for good running behavior on the weaving machine. These characteristics are provided by the Com4®compact yarns produced on the K 48. The high strength improves the load capacity of the warp threads and the low hairiness reduces the clinging tendency during shed formation. This results in high efficiency levels and low costs thanks to reduced machine downtimes.

Reduced needle wear on the knitting machine

In the knitting mill, the less hairy yarn supports the smooth running of the knitting machine. Less fiber fly is generated and the smoother yarn reduces wear on the needles. Fewer machine downtimes lead to a better utilization capacity of the knitting machine.

High flexibility in finishing

The finishing of woven and knitted fabrics places high demands on the yarns used. The popular iron-free finishing of shirts and blouses, for instance, reduces the strength of the yarns used by up to 50%. The high strength of the Com4®compact yarn provides the necessary reliability and flexibility for customer-friendly and high-quality fabric finishing.

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Rieter Compact-Spinning Machine K 48