Drives for the textile industry: gearboxes, motors, servos and couplings
A textile machine is dozens or hundreds of synchronized drives on a single frame: a carding machine carries up to 50 independently controlled rolls, a sizing machine up to 30, and a weaving shop with group drive of 200 looms runs 24/7. There are no heavy metallurgy-style shock loads here, but the requirements are exacting in their own way: yarn tension accuracy of ±0.5%, continuous S1 duty without stops, the humidity of dyeing shops, combustible textile dust (Ex-rated equipment is required at carding and beating stations), and compactness — drives sit in tight envelopes of frame machines on a 200–400 mm pitch.
Industry-typical tasks
- Main drives for carding machines and beating units — continuous S1 duty, stable speed, dust protection and Ex execution for Zone 22
- Spindle drives on ring spinning frames and roving frames — precise speed holding at 6,000–25,000 rpm, group control of 240–1,200 spindles
- Main drives for OE (open-end) rotor spinning — 60,000–120,000 rpm, independent servo control of each rotor
- Beam drives on warping and sizing machines — warp tension accuracy of ±0.5%, synchronized feed and winding
- Main drives for looms (rapier, air-jet, water-jet) — main shaft 400–1,100 rpm, up to 150,000 cycles per shift
- Drives for dryers and stenter frames — section ratings 30–250 kW, precise fabric speed control
- Drives for dyeing jiggers, jet dyeing machines and continuous dye ranges — 75–355 kW, IP65 protection against aggressive liquors and humidity
- Drives for nonwoven lines (spunbond, meltblown, needle-punched) — spinneret blocks, calenders, needle looms under servo control
Gearboxes and gearmotors
Textile equipment calls for two core gearbox families: compact R/M/F-series gearmotors for frame and multi-section machines (where dozens of drives sit in tight envelopes on a 200–400 mm pitch) and medium-power industrial gearboxes for the main drives of dryers, dye ranges and calenders. The key selection criteria are compactness and quiet operation (textile mills run around the clock, so drive noise directly affects working conditions) and continuous S1 duty without overheating at full load 24/7.
Compact gearmotors for frame and multi-section machines
BONENG R-series (helical inline) and M-series (parallel-shaft) gearmotors rated 0.18–7.5 kW are installed on every section of frame machines — stenters, sizing machines, finishing lines. Compact dimensions (housing length from 180 mm) allow one drive per section on a 250–400 mm pitch. Continuous S1 duty at 0.7–0.9 load factor is the typical textile profile.
- — Rated power 0.18–7.5 kW
- — Gear ratio 5–250
- — Housing length up to 350 mm for R-series rated up to 2.2 kW
- — Service factor of at least 1.4 at S1, 24/7
- — IP55, insulation class F
Main drives for dryers and stenter frames
Two- and three-stage helical-bevel K-series gearboxes from BONENG or GUOMAO drive stenter frames and dryer sections at 30–110 kW. They operate with the fabric tensioning chain and demand smooth motion and accurate speed holding — a ±1% deviation already produces shade variation in dyeing. A forced-lube system with oil filtration is mandatory above 45 kW.
- — K-series (helical-bevel) or R-series (helical inline)
- — Rated power 30–110 kW
- — Service factor of at least 1.5
- — Speed-holding accuracy of ±1% under varying load
- — Forced circulation lubrication
Drives for dyeing jiggers and jet dyeing machines
Dyeing equipment runs at 100% humidity with aggressive dye liquors and bath temperatures of 95–135°C. IP65-rated gearmotors are used, with FKM (Viton) shaft seals and anti-corrosion housing coatings. Power ratings are 7.5–45 kW for the jigger barrel drive and 22–75 kW for the jet-machine circulation pump.
- — IP65 minimum, housing with anti-corrosion coating
- — FKM shaft seals (resistant to dyes and elevated temperature)
- — Rated power 7.5–75 kW
- — Insulation class H with thermal reserve for humid environments
- — Service factor of at least 1.5
Drives for calenders and coating lines
Calenders for embossing, film lamination and fabric sizing require gearboxes with high torsional stiffness and accurate torque holding — otherwise streaks and coating irregularities appear on the fabric. Helical H-series BONENG gearboxes or general-purpose GUOMAO/HUALI units rated 22–160 kW are used, often paired with hydraulic roll-loading systems.
- — High torsional stiffness (vibration minimization)
- — Rated power 22–160 kW
- — Service factor of at least 1.8
- — Servo control compatibility via incremental encoder
- — Ability to operate in tandem (two-roll calender shaft synchronization)
Electric motors and servo drives
Textile equipment uses three classes of electric machine: general-purpose induction motors (Y2/YE2/YE3) for auxiliary drives and circulation pumps; medium- and high-power motors (22–355 kW) for the main drives of dye machines and stenter frames; and servo motors for precise positioning and multi-motor synchronized control. Modern nonwoven lines and high-speed looms are built almost exclusively around INOVANCE servo drives — this is what enables ±0.5% yarn tension accuracy and synchronization of dozens of drives over an EtherCAT bus.
Main drives for dyeing and drying lines
WOLONG high-efficiency YE3/YE4 induction motors rated 22–250 kW drive jet-machine circulation pumps, jigger main drives and stenter-frame fans. Continuous S1 duty with low starting frequency (1–3 per shift), but accurate speed holding via VFD is required — a series with closed-loop speed feedback through an incremental encoder is used.
- — Rated power 22–250 kW, IE3/IE4 efficiency
- — IP55 minimum, insulation class F with class B temperature rise
- — VFD-compatible (NEMA MG1 Part 31 insulation)
- — Thermal reserve for continuous S1 duty, 24/7
- — Optional encoder for closed-loop control
Servo motors for multi-motor synchronized control
INOVANCE SV660 / IS620P servo drives with 0.64–55 N·m torque control every shaft of a multi-section machine independently over EtherCAT. This is the baseline architecture for modern lines: yarn tension is held to ±0.5%, and acceleration/deceleration is synchronized between drives to within 1 ms. Used on warping, sizing, needle-punching and spunbond lines.
- — Torque 0.64–55 N·m, speed up to 6,000 rpm
- — Encoder resolution of at least 23 bits
- — EtherCAT bus for drive synchronization
- — Positioning accuracy of ±5 arc seconds
- — IP65 motor housing
Servo drives for needle-punching nonwoven machines
Needle looms deliver 1,000–3,000 strokes per minute through a crank-eccentric drive. A WOLONG ZD-series direct-drive servo motor or an INOVANCE servo with 30–150 N·m torque ensures precise speed holding and fast response to changes in fiber density. Replacing an induction drive with a servo saves up to 35% energy and improves needle-pattern uniformity across the web.
- — Torque 30–150 N·m, speed 1,500–3,000 rpm
- — Thermal reserve for S6 duty (40% cyclic duration factor)
- — IP65 housing with forced-air cooling
- — Compatibility with the machine PLC over EtherCAT
- — 23-bit absolute encoder
General-purpose motors for auxiliary drives
HUALI Y2/YE2 motors rated 0.75–22 kW power auxiliary drives: extraction fans, circulation pumps for liquor preparation, roll-feeding conveyors and rewinder drives. Continuous S1 duty without frequent starts. Carding and beating stations (combustible textile dust) require Ex execution for Zone 22.
- — Rated power 0.75–22 kW, IE2/IE3 efficiency
- — IP55 for general areas, IP65 for wet shops
- — Ex execution for Zone 22 (textile dust) at carding stations
- — Insulation class F with class B temperature rise
- — VFD operation capability
Drive control, variable-frequency drives and hydraulics
Beyond the drives themselves, textile machines need a full control infrastructure: VFDs for general drive speed control, servo systems for precise positioning, hydraulic power units for squeeze rolls and calenders, and heat exchangers for cooling dye liquors and gearbox oil. Electronics and hydraulics account for 30–40% of the cost of a modern textile line, and the stability of the whole machine in 24/7 operation depends on the quality of these components.
Variable-frequency drives for general-purpose drives
INVT GD200A / GD350 VFDs rated 0.75–315 kW are used on general variable-speed drives: pumps, fans, conveyors and main drives of auxiliary equipment. Sensorless vector control delivers ±0.5% speed-holding accuracy without an encoder — enough for the majority of continuous drives in textile production.
- — Rated power 0.75–315 kW, supply voltage 380 V
- — Sensorless vector control, ±0.5% accuracy
- — Built-in braking unit up to 30 kW
- — Modbus RTU / Profinet bus for PLC communication
- — IP21 cabinet version, optional IP54 built-in execution
Hydraulic power units for squeeze rolls and calenders
DONLY hydraulic power units with 7.5–55 kW pumps deliver 16–25 MPa for calender pressing rolls, post-dye squeeze rolls and mercerizing machines. Oil filtration to ISO 4406 17/15/12 is required, because textile fibers can enter the circuit through seals and quickly clog fine filters.
- — Working pressure 16–25 MPa
- — Flow rate 30–250 L/min
- — Oil filtration to ISO 4406 class 17/15/12
- — Oil cooler (for continuous duty)
- — Pressure and temperature monitoring reported to the PLC
Heat exchangers for dyeing and drying equipment
DEO DFL/DFLA plate heat exchangers cool dye liquors (from a 130°C cook down to 60°C before discharge) and the oil of forced-lube circuits on large gearboxes. On stenter dryers they are used to recover heat from exhaust air, delivering 15–25% fuel savings.
- — Thermal capacity 50–800 kW
- — Working pressure 1.0–1.6 MPa
- — Plate material AISI 316 (resistant to dyes)
- — EPDM or FKM gaskets
- — Easy disassembly for cleaning out textile fibers
PLCs and control systems for multi-motor machines
A modern warping or sizing machine is run by a PLC controlling 30–60 servo drives on a single EtherCAT bus. INOVANCE AM600 or AC700 PLCs are used, with native EtherCAT support and matching servo drives. This delivers a single-vendor system — commissioning and service are simpler than with a mixed-brand drive integration.
- — PLC with EtherCAT support (minimum 32 axes)
- — 10–15 inch HMI, IP65 on the front panel
- — Modbus TCP / Profinet support for MES integration
- — Program cycle time of 1 ms or better
- — PLC power redundancy (UPS)
Couplings
Three coupling types dominate textile drives: pin-bush flexible couplings on the main drives of dryers and dye machines (damping load pulsations); compact jaw and bellows couplings on servo drives (minimal backlash for positioning accuracy); and gear couplings on the main drives of calenders and large dye machines. A textile-specific feature is machine length — warping machines reach 12–18 m, with 5–8 couplings in a row between shafts, each one having to compensate radial misalignments of 0.3–0.5 mm caused by thermal expansion of the housings.
Pin-bush flexible couplings for dryer main drives
YONGJING LX (LMC) and LONGXUAN HL pin-bush flexible couplings with elastomer bushes cover 0.1–25 kN·m torque. They damp load pulsations and compensate 0.2–1.0 mm radial misalignment between the motor and the stenter gearbox. Bushes are made of NBR or polyurethane — the choice depends on the installation zone temperature (NBR up to +80°C, PU up to +110°C).
- — Torque 0.1–25 kN·m
- — Radial misalignment compensation 0.2–1.0 mm
- — NBR bushes (standard) or PU (hot zones)
- — Bush service life of at least 30,000 h
- — G6.3 balancing above 1,500 rpm
Compact couplings for servo drives and multi-motor lines
Servo drives on warping and needle-punching machines use YONGJING bellows and jaw couplings with zero backlash and torque from 1 to 500 N·m. Long machines — a 12–18 m warping line — carry up to 8 couplings on one shaft train, and the cumulative backlash of the whole chain must stay under 0.1° to hold yarn tension to ±0.5%.
- — Zero backlash
- — Torque 1–500 N·m
- — Compact form factor (housing length up to 80 mm for sizes up to 50 N·m)
- — Temperature rating up to +120°C
- — G2.5 balancing above 3,000 rpm
Gear couplings for calender and dye-machine main drives
YONGJING GIICL and LONGXUAN WGZ gear couplings transmit 5–125 kN·m between the motor and the calender gearbox, compensating up to 1° angular misalignment and 6–10 mm axial offset. Grease lubrication through a fitting with a 6-month service interval. Dye-machine duty calls for sealing that keeps steam and dye liquor out of the tooth ring.
- — Torque 5–125 kN·m
- — Angular misalignment compensation up to 1°
- — Grease lubrication, 6-month service interval
- — Sealing protected against steam and humidity
- — G6.3 balancing
Small-footprint couplings for tight envelopes of frame machines
Compact gearmotors on frame machines (sizing, finishing) use miniature LONGXUAN ML / YONGJING LMS flexible couplings with 10–500 N·m torque and 60–120 mm housing length. This allows a drive to fit into the 250–400 mm envelope between machine sections. They cushion starts and compensate small post-warm-up misalignments.
- — Torque 10–500 N·m
- — Housing length 60–120 mm (for sizes up to 100 N·m)
- — Misalignment compensation 0.1–0.5 mm
- — NBR/PU bushes, 30,000 h service life
- — On-site bush replacement without removing the shafts
Applications gallery
Our solutions for this industry
SDS portfolio brands that cover typical applications in this industry.
- BONENGcompact R/M/F-series gearmotors 0.18–7.5 kW for frame and multi-section machines — the workhorse of textile equipment; industrial K/H-series 22–160 kW for the main drives of dryers and calenders
- WOLONGhigh-power motors for dye and drying machine drives 22–250 kW (YE3/YE4); ZD-series servo motors for needle-punching and precise positioning
- HUALIgeneral-purpose Y2/YE2 motors for auxiliary drives 0.75–22 kW: fans, pumps, conveyors, including Ex execution for carding stations
- INOVANCESV660/IS620P servo drives for precise yarn tension and multi-motor synchronized control over EtherCAT — the baseline architecture of modern textile lines
- INVTGD200A/GD350 VFDs 0.75–315 kW for general variable-speed drives, sensorless vector control
- DONLYhydraulic power units for squeeze rolls, calenders and mercerizing machines at 16–25 MPa
- DEODFL/DFLA plate heat exchangers for dye-liquor cooling, stenter exhaust heat recovery and gearbox oil cooling
- YONGJINGLX pin-bush flexible couplings, bellows and jaw couplings for servo drives, GIICL gear couplings for calender main drives
- LONGXUANcompact ML/HL couplings for long machines (warping, sizing) with minimal backlash and misalignment compensation
- GUOMAOmedium-power industrial gearboxes for stenter and calender main drives 22–110 kW
Image credits: Jack Boucher, HAER (U.S. Library of Congress) (Public domain) · Clem Rutter, Rochester, Kent. (CC BY 3.0) · Ryj (Public domain) · Terry Whalebone (CC BY 2.0) · Anh Nhi Đỗ Lê (CC0)