Product Overview
Linear Motor Tubular Magnet Track
Linear motor tubular magnet tracks are precision cylindrical permanent magnet assemblies used as the magnetic secondary in tubular linear motors, linear actuators, voice-coil systems, pump drives, automation modules and high-speed positioning equipment. The magnet track is typically built with ring magnets, cylindrical magnets or segmented magnets arranged along a shaft or tube to create a stable axial magnetic field for smooth linear thrust.
A typical tubular magnet track includes ring magnets or cylindrical magnets, pole spacers, a center shaft or tubular core, optional steel flux-return parts, structural adhesive, end stops, protective sleeve or potting, and final magnetic inspection. By controlling magnet grade, pole pitch, radial or axial magnetization, concentricity, runout and air-gap field, the track can support high force density, low friction, smooth motion and long service life.
Ningbo Vanguard Technologies supplies customized tubular magnet tracks according to motor force requirement, stroke length, pole pitch, outer diameter, inner diameter, working gap, temperature, corrosion environment and installation method. We support alternating ring-magnet tracks, multi-pole tubular tracks, segmented long-stroke rods, Halbach-style tubular arrays, protective sleeve designs, field mapping and batch inspection.
Whether you need prototype tubular magnet rods for actuator development or mass-production cylindrical magnet tracks for motion-control systems, Vanguard can provide sample assembly within 10-20 days after drawing, magnet grade, pole pitch, shaft structure and inspection requirements are confirmed.
Quick View
Linear Motor Tubular Magnet Track Selection Snapshot
Ring / Rod
Tubular Geometry
Ring magnets, cylindrical magnets or segmented sleeves are arranged along the motion axis.
Pole Pitch
Axial Pitch Control
Axial pole pitch, spacer width and polarity sequence are matched to the tubular coil design.
OD / ID
Track Diameter Control
Outer diameter, inner diameter, total length, shaft fit, sleeve and end features can be customized.
10-20 Days
Prototype Lead Time
Fast sampling after drawing, ring layout, shaft design and test method are confirmed.
Tubular Tubular Track Design Focus
Cylindrical Field Uniformity
Low ripple
Sleeve / Potting
Protection
1Rod ReviewOD, ID, pitch, length
2Grade MatchBr, Hcj, temperature
3Core DesignShaft, sleeve, end stops
4Rod AssemblyBonding, polarity, runout
5Field CheckGauss, mapping, report
Key Applications
Tubular Linear Motors
Tubular magnet rods for cylindrical linear motors requiring smooth thrust, compact size and repeatable magnetic output.
Linear Actuators
Magnet tracks for electric cylinders, precision actuators, valve drives and compact reciprocating motion modules.
Pump & Valve Drives
Tubular magnetic tracks for pump drives, valve actuators and sealed linear motion systems.
Automation Modules
Compact tubular tracks for automation modules, pick-and-place equipment and direct-drive linear mechanisms.
Medical & Instruments
Cylindrical magnet assemblies for medical devices, analytical instruments and precision laboratory equipment.
Prototype Motor R&D
Small-batch tubular tracks for force testing, coil validation, field comparison and new actuator development.
Typical Tubular Magnet Track Specifications
The following options are commonly used for custom linear motor tubular magnet tracks. Final specifications are confirmed according to force target, coil design, working gap, stroke length, outer diameter, pole pitch, temperature and inspection standard.
|
Item |
Available Options |
Engineering Notes |
|
Track Type |
Ring-magnet rod, cylindrical magnet rod, segmented tubular track, Halbach-style tubular array, sleeved rod |
Selected according to motor topology, thrust target, coil inner diameter, stroke length and field distribution requirement. |
|
Magnet Material |
NdFeB, SmCo, ferrite |
NdFeB is most common for high force density; SmCo suits high temperature; ferrite is used for lower-cost or larger tracks. |
|
Magnet Shape |
Ring magnet, cylindrical magnet, radially magnetized ring, axially magnetized ring, segmented sleeve |
Ring size, pole pitch and spacer thickness are matched to coil pitch, working gap and required force ripple performance. |
|
Pole Pitch |
Customer-defined axial pitch, equal pitch, spacer-controlled pitch, matched coil pitch |
Axial pole pitch is one of the most important parameters for force output, smoothness and magnetic field distribution. |
|
Magnetization |
Axial, radial, diametrical, multi-pole or custom vector direction |
Magnetization direction must match the tubular magnetic circuit and ring-to-ring polarity sequence. |
|
Core / Shaft |
Carbon steel shaft, stainless shaft, non-magnetic tube, magnetic flux-return core, custom machined rod |
Core material affects magnetic circuit efficiency, strength, weight, corrosion resistance and assembly accuracy. |
|
Sleeve / Potting |
NiCuNi, epoxy, Zn, parylene, stainless sleeve, plastic sleeve, potting resin |
Sleeve / Potting is selected by humidity, handling risk, chemical exposure, temperature and customer safety requirements. |
|
Inspection |
Dimension, runout, concentricity, polarity, surface Gauss, working-gap field mapping, appearance |
Field mapping is recommended for precision tubular motors, long rods and force-sensitive actuator systems. |
Magnet Material & Grade Selection
|
Material |
Common Grade Range |
Temperature Capability |
Best Used For |
|
NdFeB |
N35-N52, M/H/SH/UH/EH series |
Approx. 80-200 °C depending on grade |
Compact high-force tubular motors, precision actuators, automation modules and cylindrical linear drives. |
|
SmCo |
SmCo5, Sm2Co17 series |
Approx. 250-350 °C depending on grade |
High-temperature, vacuum, aerospace, scientific and harsh-environment tubular magnet tracks. |
|
Ferrite |
Y30, Y30BH, Y35, C5, C8 |
Approx. 200-250 °C depending on grade |
Cost-sensitive tubular actuators, education systems, long rods and lower-force applications. |
Selection note: Tubular magnet track performance should be reviewed together with coil inner diameter, working gap, axial pole pitch, force target, continuous temperature, peak current, demagnetization margin, core material and field uniformity requirement.
Available Assembly Configurations
Alternating Ring Track
Axially arranged ring magnets are assembled with alternating polarity to create a repeating magnetic field along the stroke.
Halbach Tubular Track
Radial and axial magnetization segments can be combined to improve field strength and reduce leakage where design allows.
Segmented Long Rod
Long tubular magnet tracks can be supplied as matched rod segments with polarity marking and assembly sequence labels.
Sleeved Magnet Rod
Stainless, plastic or composite sleeves protect ring magnets from impact, dust, moisture and handling damage.
Potted Rod Assembly
Epoxy or resin potting improves environmental protection, insulation, magnet retention and handling safety.
Prototype Rod Kit
Small-batch tubular tracks with polarity marking, field report and packaging by set for engineering validation.
Design Points for Linear Motor Tubular Magnet Tracks
Linear motor tubular magnet tracks must satisfy magnetic performance, mechanical straightness and installation accuracy. During design review, Vanguard focuses on axial pole pitch, magnet grade, core material, adhesive strength, rod runout, concentricity, field uniformity, working gap, temperature and protection method.
For tubular linear motors, ring position, concentricity and rod straightness directly affect force ripple, air-gap stability and positioning repeatability. Field mapping and dimensional inspection are recommended for production validation.
Axial Pitch Match
Axial pole pitch, ring size, spacer width and polarity sequence are matched to the coil pitch and force target.
Cylindrical Field Uniformity
Ring tolerance, spacer control, surface field and working-gap field can be checked to reduce force ripple.
Mechanical Concentricity
Core straightness, OD consistency, concentricity and end-stop control help maintain a stable annular air gap.
Ring Retention
Adhesive type, shaft fit, sleeve, end stops, potting and handling protection are selected by load and environment.
Manufacturing & Quality Assurance
Our tubular magnet track process includes incoming magnet inspection, core or shaft inspection, surface cleaning, polarity and magnetization verification, fixture positioning, adhesive dispensing, ring placement, curing, optional sleeve or potting, dimensional inspection, runout check, surface Gauss testing, field mapping and final packaging.
|
Process Step |
Control Target |
Typical Inspection Method |
|
Magnet Inspection |
Grade, size, coating, polarity and magnetic strength |
Gauss meter, flux meter, polarity checker, caliper and visual inspection. |
|
Core / Shaft Check |
Length, diameter, straightness, runout, end features, surface condition |
CMM, runout gauge, micrometer, caliper, visual check and drawing-based dimensional inspection. |
|
Bonding & Assembly |
Ring polarity sequence, spacer thickness, adhesive coverage, curing and rod runout |
Assembly fixture, process record, visual check, OD check and sample strength validation. |
|
Magnetic Verification |
Surface field, ring polarity sequence, working-gap field and segment consistency |
Surface Gauss test, polarity check, flux test and magnetic field mapping when required. |
|
Final Track Check |
Appearance, marking, dimensions, runout, packaging and set consistency |
Visual inspection, dimensional report, magnetic report and packing checklist. |
Available Custom Features
Custom Rod Length
Rod length, outer diameter, inner diameter, segmented layout, end stops, threads and datum features can be produced according to drawings.
Custom Axial Pitch
Axial pole pitch, ring size, spacer width and polarity layout can be matched to the coil design.
Field Mapping
Surface Gauss, annular working-gap field scan and magnetic consistency report can be provided for precision applications.
Surface Sleeve / Potting
Nickel, epoxy, zinc, parylene, stainless sleeve, plastic sleeve, end caps or potting options are available.
Polarity Marking
N/S marking, arrow marking, color marking, ring sequence marking and assembly orientation labels can be provided.
Inspection Report
Dimensional report, magnetic report, field mapping report and batch traceability documents are available.
Information Needed for Fast Quotation
To quote a linear motor tubular magnet track quickly, please provide rod drawing, total length, outer diameter, inner diameter, pole pitch, ring magnet size, magnet material, core or shaft material, sleeve or potting requirement, end structure, required surface Gauss or working-gap field, annual quantity and testing standard.
If the design is still under development, you may share motor type, force target, coil inner diameter, working gap, axial pole pitch, stroke length, available installation space, operating temperature and whether field mapping is required. Our engineering team can help recommend a practical tubular magnet layout.
Frequently Asked Questions
Can you customize tubular magnet tracks according to our drawing?
Yes. Rod length, outer diameter, inner diameter, ring magnet size, pole pitch, core material, sleeve structure and inspection method can be customized according to your drawing.
Which magnet material is best for a tubular magnet track?
NdFeB is most common for high thrust density. SmCo is recommended for high-temperature or harsh environments. Ferrite can be used when cost is more important than compact force density.
Can you make long tubular magnet tracks in segments?
Yes. Long tubular tracks can be supplied as matched rod segments with alignment features, polarity marking and installation sequence labels to support long-stroke systems.
Can you provide magnetic field mapping?
Yes. Surface Gauss testing, annular working-gap field scanning, polarity sequence checks and magnetic consistency reports can be provided depending on project requirements.
How do you protect ring magnets during operation?
We can use magnet coating, stainless sleeve, plastic sleeve, epoxy potting, end caps, edge protection and suitable packaging depending on moisture, dust, impact and handling conditions.
What is the lead time for custom tubular magnet tracks?
Prototype lead time is usually 10-20 working days after drawing confirmation. Mass-production lead time is typically 25-45 working days depending on rod length, magnet grade, core machining, sleeve structure and testing requirements.
