Wholesale 25x42x9mm 6905-2RS Automotive Alternator Bearings

Name: Wholesale 25x42x9mm 6905-2RS Automotive Alternator Bearings
SKU: 6905-2RS

The 6905 medium duty bearing installed inside an electric vehicle EV drivetrain and motor assembly

6905-2RS 25mm shaft bearing showing dual rubber seals optimized for CNC machine tool spindles

Engineering dimension drawing and blueprint of the 6905-2RS 25x42x9mm deep groove ball bearing

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Item No :	6905ZZ (Metal Shield) / 6905-2RS (Rubber Seal)
Size (dDB) :	25x42x9mm
Material :	Chrome Steel GCr15
Lead Time :	3-5 days
Weight :	0.04KG
MOQ :	100 pcs
Service :	Support Sample Testing

⚙️Product Description:

Upgrading a 25mm shaft system that demands higher dynamic load capacities than ultra-thin series can provide? The 6905-2RS and 6905ZZ Bearings (25x42x9mm) step firmly into the medium-duty arena. By expanding to a robust 9mm width and 42mm outer diameter, this bearing accommodates substantially larger rolling elements, easily absorbing the intense torque and continuous vibrations that would overwhelm a 6805. It is the industrial backbone for automotive alternators, CNC machine tool spindles, and electric vehicle (EV) powertrains. As a top-tier B2B bearing trader, we optimize your Bill of Materials (BOM): deploy our rigorously tested RMO proprietary brand for highly cost-effective volume manufacturing, or utilize our global network to source premium international legacy brands to meet stringent aerospace and automotive OEM standards.

⚙️Product Features:

9mm Power Profile: Bridging the gap between thin-section and standard bearings, the 9mm width provides significantly higher dynamic load ratings (~7,050 N), making it highly resilient against radial stresses and belt tension.
Automotive-Grade Endurance: Specifically engineered to withstand the continuous high RPMs, heat cycles, and mechanical vibrations inherent in engine compartments and heavy CNC machinery.
Defensive Sealing Dynamics: Choose the 6905-2RS (Rubber Seals) to permanently lock out coolant, abrasive dust, and road grime; or the 6905ZZ (Metal Shields) for ultra-low rolling resistance in high-temperature, clean environments.
Thermal & Structural Stability: Machined from high-carbon 52100 (GCr15) chrome steel and precision-ground to ABEC tolerances, ensuring strict dimension retention and minimizing runout during intense heat cycles.
Adaptive B2B Supply Chain: We fuel your operational scalability. Procure wholesale bulk pallets of RMO bearings for the aftermarket, or request specialized tier-1 global brands for highly automated assembly lines.

⚙️Product Applications:

With its elevated structural integrity and 25mm bore, the 6905 series dominates medium-duty electromechanical sectors:

Automotive alternators, starter motors, and air conditioning compressor clutches.
CNC machine tool secondary spindles, automated robotic joints, and heavy stepper motors.
Electric Vehicle (EV) drivetrains, electric motorcycles, and ATV wheel hubs.
Industrial high-pressure fluid pumps, commercial air compressors, and packaging machinery.
Global automotive aftermarket distributors and B2B industrial machinery manufacturers.

⚙️Precautions:

1. Keep clean	2. Use with caution	3. appropriate tool	4. Hot-loading	5. Be careful of rust
Dust will have a bad effect on the bearing, so keep the surrounding clean.	Strong impact during use can easily cause scratches and indentations.	Avoid replacing existing tools, and use appropriate tools.	Bearings are precision parts, so hot installation is recommended.	Sweat on your hands during operation will cause rust, so it is best to wear gloves.

⚙️Obtain Certificate:

About Rimao

Since its establishment in 2011, Rimao Bearing has combined international vision with local wisdom and injected innovative ideas into every bearing and pulley with its profound industry accumulation and unremitting pursuit of technology. We have not only passed CE and ROHS certification, but also set a new benchmark in the industry and led the development trend of the bearing industry.

We are not just a ball bearing and roller bearing importer and wholesaler. We provide real solutions to help you achieve the product and design goals set by your customers. With more than 20 years of production and sales experience, tens of thousands of models and specifications, we look forward to cooperating with you!

⚙️Technical Parameters:

Model No.	6905ZZ / 6905-2RS (61905 Series)
Size	25x42x9mm
Bearing Type	Light Series Thin Section Ball Bearing
Load Category	Medium Duty / Automotive & CNC
Material	Chrome Steel GCr15
Sealing Form	ZZ (Metal Shields) / 2RS (Rubber Seals) Optional
Dynamic Load (Cr)	~ 7,050 N
Static Load (Cor)	~ 4,550 N
Max RPM	~ 14,000 RPM (Grease / Reference value for ZZ metal shield version)
Working Temperature	-20°C to +120°C
Brand	RMO Brand Wholesale & Global Brand Sourcing
Package	Individual plastic bag, plastic tube or original RMO brand box
Lead Time	3-5 days for stock; 7-15 days for bulk orders
Shipping	Express (DHL/FedEx/UPS), Air Freight, Sea Freight
Payment	100% T/T, or 30% T/T In Advance, 70% T/T After Finished Production

Model No.	d	D	H	m	Model No.	d	D	H	m
6900-2RS	10 mm	22 mm	6 mm	0.01 KG	6912-2RS	60 mm	85 mm	13 mm	0.19 KG
6901-2RS	12 mm	24 mm	6 mm	0.01 KG	6913-2RS	65 mm	90 mm	13 mm	0.21 KG
6902-2RS	15 mm	28 mm	7 mm	0.02 KG	6914-2RS	70 mm	100 mm	16 mm	0.34 KG
6903-2RS	17 mm	30 mm	7 mm	0.02 KG	6915-2RS	75 mm	105 mm	16 mm	0.36 KG
6904-2RS	20 mm	37 mm	9 mm	0.04 KG	6916-2RS	80 mm	110 mm	16 mm	0.38 KG
6905-2RS	25 mm	42 mm	9 mm	0.04 KG	6917-2RS	85 mm	120 mm	18 mm	0.53 KG
6906-2RS	30 mm	47 mm	9 mm	0.05 KG	6918-2RS	90 mm	125 mm	18 mm	0.58 KG
6907-2RS	35 mm	55 mm	10 mm	0.08 KG	6919-2RS	95 mm	130 mm	18 mm	0.55 KG
6908-2RS	40 mm	62 mm	12 mm	0.11 KG	6920-2RS	100 mm	140 mm	20 mm	0.79 KG
6909-2RS	45 mm	68 mm	12 mm	0.13 KG	6921-2RS	105 mm	145 mm	20 mm	0.82 KG
6910-2RS	50 mm	72 mm	12 mm	0.14 KG	6922-2RS	110 mm	150 mm	20 mm	0.85 KG
6911-2RS	55 mm	80 mm	13 mm	0.18 KG	6924	120 mm	165 mm	22 mm	1.15 KG