Product Overview
The LMF20UU nickel plating flange linear bearing is a round flanged linear ball bushing designed for 20mm shafts, built for applications that demand smooth linear motion, reliable mounting, and resistance to corrosion. The nickel-plated housing sets this version apart from standard chrome steel units, extending service life in environments where moisture, humidity, or mild chemical exposure would otherwise accelerate surface degradation.
At Zhejiang Siqiang Bearing Manufacturing Co., Ltd., this bearing is manufactured in our 19,800-square-meter production facility in Lishui, Zhejiang, using over 100 CNC machining and grinding centers. Every unit passes through our ISO 9001-certified quality management process before leaving the factory.
Key Specifications
| Parameter | Value |
|---|---|
| Model | LMF20UU |
| Inner Diameter (ID) | 20 mm |
| Outer Diameter (OD) | 32 mm |
| Total Length | 42 mm |
| Flange Diameter | 54 mm |
| Flange Thickness | 8 mm |
| Mounting Holes | 4-hole round flange |
| Dynamic Load Capacity (Cr) | 883 N |
| Static Load Capacity (Cor) | 1,373 N |
| Material | Chrome steel housing, nickel-plated finish |
| Seals | Double rubber seals (UU type) |
| Shaft Compatibility | 20mm ground linear shaft (g6 tolerance) |
Key Features & Benefits
Enhanced Corrosion Resistance
The high-quality nickel plating provides a robust barrier against oxidation, making it ideal for environments where standard steel bearings may fail.
01
Precision Manufacturing
Produced using industry-leading CNC machinery and grinding equipment to ensure a 20 mm inner diameter with strict tolerance control (0 to -9 μm).
02
High Load Capacity
Designed with five rows of balls to support a basic dynamic load rating (C) of 860 N and a static load rating (C0) of 1370 N.
03
Durability & Low Noise
Built with premium bearing steel and optimized internal geometry to withstand high temperatures and high-speed operation while maintaining low noise levels.
04
Global Quality Standards
Our products are RoHS and REACH compliant, ensuring compliance with the environmental safety requirements of the European and North American markets.
05
Products Description
Zhejiang Siqiang Bearing Manufacturing Co., Ltd. holds ISO 9001 quality management system certification and operates as a recognized honest enterprise in Lishui City. Our quality inspection process covers dimensional verification, surface hardness, seal integrity, and dynamic running tests before any batch ships.
The SQ brand has been built on this production discipline since the company's founding on June 19, 2007. Customers in Southeast Asia, Europe, Africa, and South America who have sourced from us over multiple years do so because the dimensional consistency across batches eliminates the qualification overhead that comes with switching suppliers.
Industrial Applications
The LMF20UU Nickel Plating flange bearing is widely utilized across various sectors due to its versatility and "clean" aesthetic finish:
Product Specification
| Round Type | Square Type | Oval Type | No. of ball rows | Weight* (gf) | Max allowable radial clearance (μm) | Basic dynamic load rating C (N) | Basic static load rating C0 (N) | Inner Diameter Dr (mm) | Inner Diameter Tolerance (μm) |
| LMF 6UU | LMK 6UU | LMH6UU | 4 | 26.5 | -5 | 200 | 260 | 6 |
0 -9 |
| LMF 8UU | LMK 8UU | - | 4 | 34 | -5 | 170 | 220 | 8 | |
| LMF 8UU | LMK 8UU | LMH8UU | 4 | 40 | -5 | 260 | 400 | 8 | |
| LMF 10UU | LMK 10UU | LMH10UU | 4 | 78 | -5 | 370 | 540 | 10 | |
| LMF 12UU | LMK 12UU | LMH12UU | 4 | 76 | -5 | 410 | 590 | 12 | |
| LMF 13UU | LMK 13UU | LMH13UU | 4 | 94 | -7 | 500 | 770 | 13 | |
| LMF 16UU | LMK 16UU | LMH16UU | 5 | 134 | -7 | 770 | 1170 | 16 | |
| LMF 20UU | LMK 20UU | LMH20UU | 5 | 180 | -9 | 860 | 1370 | 20 | |
| LMF 25UU | LMK 25UU | LMH25UU | 6 | 340 | -9 | 980 | 1560 | 25 |
0 -10 |
| LMF 30UU | LMK 30UU | LMH30UU | 6 | 460 | -9 | 1560 | 2740 | 30 | |
| LMF 35UU | LMK 35UU | - | 6 | 795 | -13 | 1660 | 3130 | 35 |
0 -12 |
| LMF 40UU | LMK 40UU | - | 6 | 1054 | -13 | 2150 | 4010 | 40 | |
| LMF 50UU | LMK 50UU | - | 6 | 2200 | -13 | 3820 | 7930 | 50 | |
| LMF 60UU | LMK 60UU | - | 6 | 2960 | -16 | 4700 | 9990 | 60 | 0-15 |
| LMF 80UU | LMK 80UU | - | 6 | 5800 | -20 | 7350 | 16000 | 80 | |
| LMF 100UU | LMK 100UU | - | 6 | 10600 | -30 | 14100 | 34800 | 100 |
0 -20 |
Notes: Nickel plating is available as an option; 1 N = 0.102 kgf
| Outer Diameter D (mm) | Tolerance (μm) | Length L (mm) | Tolerance (μm) | D1 (mm) | Tolerance (μm) | H | PCD | K | W | A | F | Verticality (μm) | d1×d2×h | Type |
| 12 |
0 -11 |
19 |
0 -200 |
28 |
0 -200 |
5 | 20 | 22 | 18 | 20 | - | 12 | 3.5×6×3.1 | LMFKH6UU |
| 15 | 17 | 32 | 5 | 24 | 25 | - | - | - | 12 | 3.5×6×3.1 | LMFKH8SUU | |||
| 15 | 24 | 32 | 5 | 24 | 25 | 21 | 24 | - | 12 | 3.5×6×3.1 | LMFKH8UU | |||
| 19 |
0 -13 |
29 | 40 | 6 | 29 | 30 | 25 | 29 | - | 12 | 4.5×7.5×4.1 | LMFKH10UU | ||
| 21 | 30 | 42 | 6 | 32 | 32 | 27 | 32 | - | 12 | 4.5×7.5×4.1 | LMFKH12UU | |||
| 23 | 32 | 43 | 6 | 33 | 34 | 29 | 33 | - | 12 | 4.5×7.5×4.1 | LMFKH13UU | |||
| 28 |
0 -16 |
37 | 48 | 6 | 38 | 37 | 34 | 31 | 22 | 12 | 4.5×7.5×4.1 | LMFKH16UU | ||
| 32 | 42 | 54 | 8 | 43 | 42 | 38 | 36 | 24 | 15 | 5.5×9×5.1 | LMFKH20UU | |||
| 40 | 59 |
0 -300 |
62 |
0 -300 |
8 | 51 | 50 | 46 | 40 | 32 | 15 | 5.5×9×5.1 | LMFKH25UU | |
| 45 |
0 -19 |
64 | 74 | 10 | 60 | 58 | 51 | 49 | 35 | 15 | 6.6×11×6.1 | LMFKH30UU | ||
| 52 | 70 | 82 | 10 | 67 | 64 | - | - | - | 20 | 6.6×11×6.1 | LMFKH35UU | |||
| 60 | 80 | 96 | 13 | 78 | 75 | - | - | - | 20 | 9×14×8.1 | LMFKH40UU | |||
| 80 |
0 -22 |
100 |
0 -400 |
116 |
0 -400 |
13 | 98 | 92 | - | - | - | 20 | 9×14×8.1 | LMFKH50UU |
| 90 | 110 | 134 | 18 | 112 | 106 | - | - | - | 25 | 11×17×11.1 | LMFKH60UU | |||
| 120 |
0 -25 |
140 | 164 | 18 | 142 | 136 | - | - | - | 30 | 11×17×11.1 | LMFKH80UU | ||
| 150 |
0 -29 |
175 |
0 -500 |
200 |
0 -500 |
20 | 175 | 170 | - | - | - | 40 | 14×20×13.1 | LMFKH100UU |
Customization Options
Siqiang accepts orders with custom specifications across the following parameters:
- Surface finish: Standard chrome steel, nickel plating, or zinc treatment depending on corrosion requirements.
- Sealing: Open (no seal), single seal, or double seal (UU) configurations available.
- Packaging: Plastic bag, paper box, carton, or custom-branded packaging with your logo. Custom packaging design, including branded boxes and cartons, is available for OEM orders.
- MOQ and sampling: Sample units with real production photos available before bulk order. Prototype and sample preparation service included.
- Installation support: Assembly tutorial videos and installation documentation can be provided for all products.
Why Choose SQ
Proven Expertise
Established in 2007, we specialize in linear motion systems, including sliding units, shafts, and ball screws.
Comprehensive Customization
We offer OEM/ODM services for seals, plastic bags, and branded packaging (logo customization) to suit your distribution needs.
Global Supply Chain
With self-managed export rights, our products are trusted by clients in Southeast Asia, Europe, South America, and the USA.
Reliable Support
We provide a 1-year warranty and offer technical installation videos and assembly tutorials to ensure seamless integration.
Frequently Asked Questions
Q: What are the specific advantages of the "Nickel Plating" on the LMF20UU bearing?
A: The nickel-plating process provides an extra layer of protection, significantly enhancing corrosion and rust resistance compared to standard bearing steel. This makes the LMF20UU Nickel Plating ideal for applications in high-humidity environments, such as food packaging, medical equipment, and chemical processing. Beyond durability, it also offers a clean, professional aesthetic for high-end machinery.
Q: Is SQ a certified manufacturer for international projects?
A: Yes, we are a high-tech enterprise and serve as the Vice President Unit of the Lishui Rolling Function Component Association. Our factory is ISO 9001-certified. Furthermore, our products comply with international standards, including RoHS and REACH, ensuring they meet the strict environmental and safety requirements of markets in Europe and North America.
Q: Can I request customized packaging or branding (OEM) for my order?
A: Absolutely. We provide comprehensive customization services for B2B clients, including custom seals, logo engraving, and specially designed brand boxes or cartons. We can also provide physical samples and design mock-ups before mass production to ensure the final product aligns with your brand identity.
Q: What is your production capacity and typical lead time?
A: We operate a 19,800-square-meter modern facility equipped with over 100 sets of advanced CNC lathes and grinding machines. With a workforce of over 140 employees and specialized automated assembly lines, we can handle high-volume orders efficiently. Lead times are negotiable depending on the order size and customization requirements.
Q: What kind of after-sales support and warranty do you provide?
A: We offer a 1-year warranty on our linear bearings. To ensure successful integration, we provide technical support through operation videos and assembly tutorials. If any components are damaged during normal use within the warranty period, we provide free replacement parts as part of our commitment to "Quality First, Sincere Service".
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