PVDF Bearings Manufacturers

Jiangsu Yinghong Transmission Technology Co., Ltd. manufactures PVDF Bearings as part of the plastic bearing family we produce under the YHU brand. We are a group-based transmission products manufacturer formed through the joint investment of Dongguan Yinghong, Linqing Boshuo and Yancheng Jiwei, running automated production lines and high-precision inspection equipment at our facility in Funing County, Yancheng City, Jiangsu. Polyvinylidene fluoride bearings serve rotating assemblies that meet acids, bases, halogens, salt water and warm process media on the same shaft.

PVDF is not a commodity plastic. It is the strongest and stiffest of the common fluoropolymers, keeps usable strength at 100 °C, absorbs almost no water, and remains electrically insulating and non-magnetic throughout its working range. We build it as a complete bearing — rings, balls, cages and covers — so corrosion protection comes from the whole assembly instead of a surface treatment.

Our PVDF Bearing Range and Material Positioning

PVDF sits inside a plastic bearing programme that already covers POM, PP, UPE, PEEK, PTFE, PA66, PI and specially modified polymers. That breadth matters in practice, because PVDF is chosen when chemical exposure and mechanical strength both have to hold, while a lighter polyolefin or a softer fluoropolymer would fail on one of the two.

• Construction: open assemblies for direct media contact, plus shielded or sealed builds where contamination control or washdown protection is part of the requirement.
• Geometry: miniature and thin-section outlines produced as standard or to drawing, with bore and outside diameter tolerances matched to the mating shaft and housing.
• Ball choice: polymer balls keep the assembly fully non-metallic and non-magnetic; ceramic or glass balls raise stiffness and load capability when the duty needs it.
• Clearance: running clearance is set for the interference of the installation and the expected temperature rise at the working point.
• Customisation: non-standard rings, cages and complete assemblies developed from your drawing or sample through design, prototype and series production.

Where PVDF Bearings Fit

PVDF bearings perform best in slow to moderate speed positions where the environment, not the load, is the constraint: chemical dosing and transfer pumps, plating and etching lines, wet benches, water and effluent treatment, marine deck hardware, and washdown zones in medical, food and textile equipment. Semiconductor tooling and precision instrument assemblies also use them where metal contamination and magnetic interference must be excluded.

They are not a general replacement for hardened steel in high-load, high-speed shafts. Where the duty exceeds what a polymer ring can carry, we move the project to our Deep Groove Ball Bearings or Flanged Bearings lines in stainless steel, and keep the PVDF part for the positions where chemistry dictates the material.

Selecting Between PVDF and Our Other Plastic Materials

The table below reflects how we position PVDF against the polymers we already produce in volume. It is the comparison we run internally before confirming a grade, and it keeps the choice anchored to the working point rather than to habit.

Configuration Detail We Fix Before Production

Plastic bearings behave differently from steel ones in the housing, so the configuration work is mostly about fit, clearance and wall thickness. We confirm each of these on the drawing release, not at assembly.

• Interference and press fit: PVDF has a lower elastic modulus than steel, so the recommended bore interference is set to hold the ring without distorting the raceway.
• Thermal clearance: differential expansion between the polymer ring and a metal shaft is calculated across the full temperature range, including peak conditions.
• Ring section: wall thickness and cage design are matched to the radial and axial load split the application actually applies.
• Retention: press fit, shoulder location, adhesive bonding or retaining rings are selected against the mounting method in the equipment.
• Lubrication: dry running with the self-lubricating polymer, or a chemically compatible grease where the seal arrangement allows it.

Capacity, Speed and Thermal Practice

Load capacity in a PVDF bearing is governed by contact geometry, running clearance and temperature together, which is why a single static load figure is not useful on its own. We size the bearing against the real working point: the load split, the speed and duty cycle, and the temperature the rings will actually see.

Creep resistance is one of the reasons PVDF works in sustained preload positions. Under a 9.8 MPa load, creep strain stays near 2.2 % at ambient and about 7 % at 100 °C, so the ring keeps its form instead of relaxing out of the housing over a long service interval. Speed limits follow the PVDF grade, the ball material and the clearance we set, and we state the permissible window on the proposal rather than leaving it to field trial.

Quality Control and Acceptance

Yinghong operates a closed-loop quality management system covering raw material intake, production processes and finished product release, supported by high-precision inspection and testing equipment. We are a National High-Tech Enterprise holding invention and utility model patents, certified to IATF 16949, RoHS, CE and SGS.

• Dimensional verification of bore, outside diameter, width and running clearance against the released drawing.
• Rotation checks covering friction, noise and vibration behaviour of the assembled bearing.
• Sealing and cover integrity where a shielded or sealed build is specified.
• Material and corrosion verification appropriate to the polymer grade and the media list.
• Documentation agreed for the order, with the certification set behind it including RoHS, CE and SGS test reports.

Information We Use to Configure Your Solution

A PVDF bearing proposal is only as good as the working point behind it. The table shows what we work from and how each input changes the design we release.

Custom PVDF Bearing Development and Project Support

Our customisation programme integrates R&D, production, sales and after-sales service, and it covers standard and non-standard PVDF bearing projects from solution design and prototype production through mass delivery and technical follow-up. Where an existing assembly is failing, we work from the failure description, the media list and the mounting arrangement, then design or optimise the ring structure, polymer grade and running clearance for the application.

The same engineering group supports the wider range we manufacture, so a project that starts with a PVDF position and grows into stainless or ceramic hardware stays with one technical contact. Our complete bearing product range covers the material families and geometries that most chemical, medical, semiconductor, marine and precision instrument projects require.

Frequently Asked Questions

Which chemicals can PVDF bearings handle?

PVDF withstands most acids, bases, halogens, aliphatic and aromatic hydrocarbons, alcohols and aldehydes at room temperature, and it resists chlorinated media particularly well because of its low permeability. Fuming sulfuric acid, strong bases, ketones and ethers cause swelling, and strongly polar solvents such as dimethylacetamide and dimethyl sulfoxide dissolve the polymer. We confirm the full media list, concentration and temperature before releasing a grade.

How does PVDF compare with PTFE and PEEK for bearing duty?

PVDF delivers higher strength and stiffness than PTFE while keeping excellent acid, base and halogen resistance, which makes it the better choice where the position carries real load in an aggressive medium. PTFE remains the option for the widest chemical tolerance and lowest friction at low load. PEEK takes over where temperatures run above the PVDF range or where mechanical demands are highest.

What temperature range do your PVDF bearings work in?

Long-term service runs from -40 °C to +150 °C, with an embrittlement point below -60 °C and a crystalline melting point near 180 °C. Peak conditions matter as much as the nominal figure, so we ask for both and set the running clearance accordingly.

Can you produce a non-standard PVDF bearing from our drawing or sample?

Yes. Custom development of standard and non-standard bearings is core to what we do, and we support it through solution design, prototype production, mass delivery and after-sales technical support. Send the drawing or a mating sample together with the working point, and we return a configuration and quotation against it.

Do PVDF bearings need lubrication?

The polymer is self-lubricating, so dry running is normal and often preferred in chemical contact positions where grease would be attacked or would contaminate the process. Where the speed or load benefits from lubrication, we configure a chemically compatible grease and select the cover or seal arrangement that keeps it in place.

Are the bearings non-magnetic and electrically insulating?

PVDF rings and polymer balls produce a fully non-metallic, non-magnetic bearing with high volume resistivity and a dielectric constant between 6 and 8. That combination suits instrument, semiconductor and medical positions where metal rings would interfere with the measurement or the process.