Rotor Complete Assemblies — Balanced, Ready to Mount
JSM manufactures ready-to-mount rotor complete assemblies for OE rotor spinning machines: precision rotor cup and spindle, dynamically balanced in-house — with custom diameter, groove and coating for your machine and yarn count.
Rotor Complete, Rotor Assembly or Rotor Cup Complete — Same Component
The ready-to-mount unit is called a rotor complete on most platforms, a rotor assembly in maintenance documentation, and a rotor cup complete in parts catalogues. The rotor cup and spindle can also be ordered separately — tell us how your machine’s parts list names it, and we match the correct configuration.
Anatomy of a JSM Rotor Complete
Every rotor complete leaves the factory as one balanced unit — no pressing, no mounting, no guesswork at your mill.
Rotor Cup
Precision-machined rotor cup (cup head) whose groove type defines the yarn count range — G, GT, K, S, T, T(B5), U, TT and GL profiles.
Rotor Spindle
Precision-ground rotor spindle (rotor shaft) matched to the cup for high-speed rotation, with balancing-matched fit and surface finish.
Complete Unit
Pre-assembled and dynamically balanced rotor complete — ready to mount. Rotor bearings are supplied separately from JSM’s 13-model bearing line.
Which Rotor Groove for Your Yarn?
Rotor groove geometry directly affects fibre collection, yarn strength and spinning stability. Use the table below as a starting point — our engineers confirm the final groove with your yarn count and fibre blend.
| Groove Type | Yarn Count Range (Ne) | Typical Use |
|---|---|---|
| G | 16–40 | Medium to fine yarns |
| GT | 3–30 | Coarse to medium yarns |
| K | 30–40 | Fine yarns |
| S | 16–40 | Medium to fine yarns |
| T | 16–40 | Medium to fine yarns |
| T (B5) | 16–40 | Medium to fine yarns |
| U | 10–30 | Medium-coarse yarns |
| TT | 16–40 | Medium-fine yarns (narrower groove, T variant) |
| GL | 3–16 | Coarse yarns, large-diameter rotors |
Reading the model code: on Schlafhorst-platform codes, the last two digits are the rotor diameter in millimetres — for example, T533 means a T-type rotor of Φ33 mm. Standard JSM diameters range from 26 mm to 48 mm; custom diameters are manufactured on request.
Three Surface Options, One Quality Standard
Coating choice balances wear resistance, fibre behaviour and cost — matched to your fibre type and rotor speed.
DN Diamond Coating
Maximum wear resistance and reduced fibre deposits on the groove surface. Best for abrasive fibres (recycled cotton, polyester blends) and high rotor speeds — extends rotor life and stabilises yarn quality between changes.
BD Boronized
Boronizing hardens the rotor surface for improved wear resistance at a lower cost — a practical choice for mills replacing rotors in high volume.
Standard Surface
Precision-machined and polished to original equipment specification for normal cotton applications — the economical baseline for standard running conditions.
Find Compatible Rotor Completes for Your Machine
Choose your OE spinning machine series to browse the matching JSM rotor assemblies — custom configurations available for any platform.
Rotor Complete — Specification Overview
| Item | Description |
|---|---|
| Product Name | Rotor Complete Assembly (rotor cup + rotor spindle) |
| Diameter Range | Φ26–48 mm standard series; custom diameters on request |
| Groove Types | G · GT · K · S · T · T(B5) · U · TT · GL |
| Surface Treatment | DN diamond coating (HV 1000-1200) · BD boronized · Standard |
| Balancing | Dynamic balancing performed on every complete assembly before dispatch |
| Machine Brands | Schlafhorst · Rieter · Saurer · Taitan · Jingwei · Rifa |
| Material | Wear-resistant alloy steel |
| Manufacturing | Precision CNC machining + heat treatment + surface coating |
| Quality Control | 100% inspection before delivery |
| Customization | Custom diameter, groove and coating per sample or drawing (reverse-engineering service) |
Machine Series Coverage
| Machine Brand | Machine Series | Configuration |
|---|---|---|
| Schlafhorst | Autocoro SE7 / SE8 / SE9 / SE10 / SE11 / SE12 / SE20 | Rotor Complete |
| Rieter | R1 / R20 / R40 / R60 / R923 / R35 / R36 / R37 | Rotor Complete |
| Saurer | BD320 / BD330 / BD350 / BD380 / BD448 / BD416 / BD6 / BD7 | Rotor Complete |
| Taitan | TQF 368 / TQF 568 / TQF-K80 / K90 series | Rotor Complete |
| Rifa / Jingwei | Mainstream domestic OE series (RF-RS, JWF 1618) | Rotor Complete |
Machine not listed? We cover more platforms than listed here. Send us your machine model, part number or a photo of the existing rotor — we match the right diameter, groove and coating, with custom configurations included.
Manufacturing & Quality Control
JSM controls the complete production process so every rotor complete delivers stable performance, batch after batch.
CNC Machining
Rotor cup and spindle machined to OEM tolerances.
Heat Treatment
Wear-resistant alloy steel hardened for long service life.
Surface Coating
DN diamond (HV 1000-1200), BD boronized or standard finish applied.
Assembly & Balancing
Cup and spindle assembled and dynamically balanced.
100% QC
Dimensional, groove profile and run-out inspection before packaging.
Frequently Asked Questions
What is a rotor complete assembly?
A rotor complete assembly is the ready-to-mount unit of precision rotor cup and rotor spindle, dynamically balanced as one piece. On different machine platforms it is also called a rotor assembly or rotor cup complete. Rotor bearings are available separately from JSM.
Which machines are compatible with JSM rotor complete assemblies?
JSM covers Schlafhorst Autocoro SE7–SE20, Rieter R1/R20/R40/R60/R70/R923 and R35/R36/R37, Saurer BD320/BD330/BD350/BD380/BD448/BD416/BD6/BD7, plus Taitan, Jingwei and Rifa OE spinning machines.
How do I read a rotor model code?
On Schlafhorst-platform codes, the last two digits indicate the rotor diameter in millimetres. For example, T533 means a T-type rotor of 33 mm diameter. Standard JSM diameters range from 26 mm to 48 mm, with custom diameters available on request.
Which groove type should I choose for my yarn?
As a general guide: GL and GT for coarse counts (3–16 Ne and 3–30 Ne), G/S/T/T(B5)/TT for medium to fine counts (16–40 Ne), U for medium-coarse (10–30 Ne), and K for fine counts (30–40 Ne). Send your yarn count and fibre blend — our engineers confirm the final groove.
Which coating is recommended?
DN diamond coating (HV 1000-1200) is recommended for abrasive fibres, high rotor speeds and maximum service life. BD boronized is a cost-effective wear-resistant option, and standard uncoated rotors are available for normal conditions.
Can JSM manufacture rotor completes according to samples or drawings?
Yes. We reverse-engineer and produce compatible rotor completes from customer samples or technical drawings, with custom diameter, groove and coating, and 100% inspection before delivery.
How long does delivery take?
Standard models ship within 7–15 days. Custom orders typically take 20–30 days depending on specification.
Complete Your Spinning Box Spares
Rotor Bearing
Precision rotor bearings (60K–120K rpm) for stable high-speed spinning performance.
Opening Roller Complete
Plug-and-play opening roller / combing roller complete assemblies, ready to mount and spin.
Clothing Ring
One-piece precision rings with integrated tooth profile — B174, S21, OB20, OK40, OK61, OS21.
Carding Wire / Strip
Individual wire strips for roller head re-clothing — Graf, DN diamond and Cr coating options.
Need the Correct Rotor Complete for Your Machine?
Send your machine model, part number or a photo of the existing rotor. Our engineering team confirms the diameter, groove and coating — and quotes within 24 hours.