laminar ring | laminar seal ring

Laminar ring is a metallic spiral retaining ring made from coiled flat wire. Shunhua Engineering Co. is a dedicated laminar seal ring manufacturer based in China. Laminar rings have the characteristics of a labyrinth seal, the labyrinth gap effect will lead some penetrated liquid back by centrifugal force. It is mainly used for the bearings. We masted the core manufacturing process through R&D, As the demand increases, We are committed to investing more to improve manufacturing efficiency and expand production. If you have used German or American laminar rings before, We are a perfect alternative supplier for your needs.
finished laminar ring

Check for laminar ring dimensions

We support all following assembly features.

The following configurations/Types are the most popular ones, if you want something else, please Contact Us:
single wound: FK3 AS, FK3 ASK, FK3 IS, FK3 ISK double wound: FK6 ASD, FK6 ASKD, FK6 ISD, FK6 ISKD FK6: lSD,  1 set = 2 rings ( for shaft ).         lSKD, 1 set = 3 rings(2 for shaft, 1 for bore) .         ASD, 1 set = 2 rings( for bore).         ASKD,  1 set = 3 rings(1 for shaft, 2 for bore) . FK3: lS,  1 set = 3 rings(for shaft).         AS,  1 set = 3 rings(for bore).         lSK,  1 set = 5 rings(3 for shaft, 2 for bore) .         ASK,  1 set = 5 rings(2 for shaft, 3 for bore).
All FK3 series is single wound Laminar Rings used for bearings. Its protective ability is less than FK6 series, but still, get the job done. FK3 prevents the ingress of dust and environmental moisture. The 5 ring types ASK or ISK ring sets have increased labyrinth effect. simply because these 2 types have more rings per set. Within 3 ring set config, IS laminar ring is easier to fit in the grooves. For 5 ring set config, The ISK is easier to fit in. generally speaking laminar rings for the shaft is easier to install.
All FK 6 series Laminar Rings are double wound laminar rings for bearings and the front of radial lip seals. Higher sealing performance is achieved by the FK 6 Laminar Rings when exuding grease. They also perform better, compared to FK3 series, in protection against dust, dirt and splash water. FK 6 Laminar Rings benefited from the double wound nature, First, It has no gap, second, the double wound enable higher retention force. Like the FK3 series, ASKD and ISKD perform better because they are 3 rings per set(the other types ISD and ASD is 2 ring per set). After your decision to choose 2 ring config or 3 ring config, then remember that ISD is easier to fit in than ASD for 2 ring config. For 3 ring config, The ISKD is easier to fit in.

Pricing of our laminar rings:

Our laminar rings cost one-third the price of the others. And the reason that ours are cheaper is not that we cut corners. It’s because we have established a very efficient ecosystem here over the years, and we also located 2-hour drive away from Shanghai, which is distant enough to keep cost low and close enough to facilitate the international shipping. Combining the 2 factors(efficient supply chain and location), we have managed to produce the highest quality laminar rings at a fraction of the cost of the other brands. Tell us your requirements: material, specifications, and quantity. e.g. FK5 ISD 170/6.0×2.0 material: SS304 quantity:1000 sets.  We will quote within 8 hours.   Preferred Payment: West Union/TT etc. Not in stock, we produce according to your order. 


Same as the German ones. As we have perfected the coiling process and heat treatment process, so compared with German laminar rings using the same material, there’s no quality difference. If you want higher quality, you can ask us using higher quality material like SS316Ti. If you don’t have a specific material in mind, then we will assume that material is SS304 which is good enough for most situations. And our products adhere to the same tolerance standard as Germany’s. Transport Package: Carton.  For small orders, packages can be delivered by air. And you can always ask for a refund or replacements with no strings attached. MOQ is 50 sets, you can have a trial order. our products are widely used in our domestic steel mills. we also have exported to many European countries.  The feedback is great. Our business relies on repeat customers. We look forward to establishing a long-term relationship with you.

Notes :

Laminar rings are not like the O-rings. There is an opening in a laminar ring and this opening is crucial for the sealing as the opening become smaller or larger depending on the installation.  e.g. ASD laminar rings used for the bore, the opening is larger before installation, after installation, the opening is squeezed smaller, the tension makes the sealing ring cling tighter to the bore. Laminar seal ring’s HS Code is  8484100000. There is a range of standard sizes you can choose from. for non-standard sizes, we need your drawings. We also produce US versions like VH & VS, WH & WS, EH & ES, WHT & WST, WHM & WSM, DNH & DNS series. Just give us your inquiries like this “WH-52 material: SS304, quantity:1000 pcs”, then you will get quotes within hours.
Tolerance table:
We also produce Tollok locking assemblies