What material is the 604 bearing made from?

Standard 604 bearings use chrome steel (GCr15/SAE52100) rings and balls with a pressed steel cage; 440C stainless steel construction is available for corrosive or aerospace-adjacent environments.

What is the load capacity of a 604 bearing?

The 604 bearing has a dynamic load rating of approximately 0.8kN and a static load rating of approximately 0.28kN, suitable for lightweight, low-to-moderate load applications such as micro motors and drones.

Is the 604 bearing suitable for skateboard or roller skate wheels?

No, skateboard and roller skate wheels typically require 608-size bearings (8mm bore); the 604's 4mm bore is designed for smaller precision applications such as micro motors, fans, and instruments.

High-Speed Lightweight 604 Miniature Ball Bearing for Precision Instruments

Name: High-Speed Lightweight 604 Miniature Ball Bearing for Precision Instruments
Brand: Xiamen Dreampower Intelligent Technology Co., Ltd.
SKU: 2284051965

Fujian, ChinaXiamen Dreampower Intelligent Technology Co., Ltd.

US$0.50-2.50

10 Pieces

Sample price:US$0.50/piece.Request sample

Product profile

Customization

Available

Limiting Speed

60,000 Rpm (Grease)

Reference Speed

120,000 Rpm

Model NO.

604

Vibration Grade

Z1/Z2 (Low Noise Standard)

Operating Temperature

-30°C to +120°C

Weight

~2g

Bearing Material

Chrome Steel (Gcr15/SAE52100) Standard

Cage Material

Pressed Steel Cage

Radial Clearance

Cn (Standard) / C2 / C3 / C4 / C5

Precision Grade

P0 / P6 / P5

Seals Type

Open / Zz / 2RS

Application Field 1

Micro Motors, Drones, Cooling Fans

Application Field 2

Precision Instruments, Hard Drives

Application Field 3

Fidget Spinners, Miniature Pumps

Transport Package

Industrial Packing/Single Box Packing/Carton Box

Specification

4mm*12mm*4mm

Trademark

Welink

Origin

China

HS Code

84821020

Production Capacity

2000000/Monthly

Key features

Precision & Performance: Silent, maintenance-free, long-life, and high-efficiency operation for demanding applications.

Versatile Seal Options: Available in 2RS, ZZ, or open configurations to suit various environmental needs.

Compact Dimensions: Ultra-small size of 4mm*12mm*4mm ideal for micro motors and compact mechanisms.

Wide Application Range: Suitable for micro motors, drones, cooling fans, precision instruments, medical devices, and small automotive sensors/actuators.

Certified Quality: Certified by ISO 9001:2015, ROHS, and REACH for global compliance and safety.

Lifetime Warranty: Comprehensive lifetime warranty coverage for all mechanical defects.

Global Support Network: 24/7 technical assistance and partnered service centers in key regions worldwide.

Custom Solutions: OEM/ODM capabilities and tailored size solutions available for specific requirements.

Company profile

Xiamen Dreampower Intelligent Technology Co., Ltd.

Fujian, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2010-12-01Nearest Port: Guangzhou, Xiamen, ShanghaiAverage Response Time: ≤6.58hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DDP, DAP, DAT, FAS, CIP, CPT, FCA, Others

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier focused on bearings and power-transmission products. It offers broad customization and ODM services, but does not provide 3D software design, SDKs, or OEM services for popular brands, and reported no new products in the past year. ISO 9001 certification is stated. The supplier claims integrated R&D-production bases, automated equipment, measurement tools, and strict quality control, while finished products are checked by packing staff. Export activity is reported at 90% of sales, with self-operated import/export rights and one year of export experience. However, reported operating revenue, costs, gross profit, and operating profit for the stated periods are zero, and there is no overseas warehouse, overseas showroom, overseas agent or branch, or offline trade-show participation. After-sales capability is not sufficiently documented.

Supplier typeThe supplier is explicitly identified as a professional technical supplier and its business scope includes bearing manufacturing, bearing sales, and high-speed precision heavy-duty bearings. This supports classification as a specialized bearing and industrial power-transmission supplier.

CertificationsThe supplier states that it holds an ISO 9001 supplier management-system certification. The provided information does not include the certificate number, issuing body, or validity period, but it is explicit evidence of certification holding.

After-Sales capabilityThe supplier has no in-stock service capacity, overseas warehouse, overseas showroom, overseas agents or branches, and offers overseas services in zero countries. Service-capability assessment also lacks written procedures or followed records, so the available evidence does not demonstrate a robust after-sales network.

Financial creditThe stated financial records report zero operating revenue, operating costs, gross profit, and operating profit for the listed periods. These figures provide explicit negative evidence regarding reported financial performance and therefore raise a material financial-credibility concern.

Production capacityThe business scope explicitly includes bearing manufacturing, including high-speed precision heavy-duty bearings. The supplier also claims integrated R&D-production bases, automated equipment, precise measuring tools, skilled operators, and strict process quality control, although the provided information does not quantify production capacity.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, flexible customization, and ODM services. This is direct evidence of broad product customization capability, despite the absence of 3D software design services.

Product Q&A

Q:Do you provide after-sales service overseas?

Yes, we have partnered service centers in key regions.

Q:Can I request a customized size?

Absolutely! We offer tailored solutions.

Q:What documents do you provide for export?

Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q:How do I place an order?

Q:What are the dimensions and speed rating of a 604 bearing?

The 604 bearing measures 4mm bore x 12mm outer diameter x 4mm width, with a limiting speed of up to 60,000 rpm under grease lubrication, making it ideal for high-speed micro motors and precision instruments.