Wheel Hub Ball Bearing:DAC40680042

Description

Basic Parameters

In the wheel hub ball bearing model DAC40680042: “DA” indicates the bearing type is a double-row angular contact ball bearing. This type of bearing can withstand both radial loads (from vehicle weight) and bidirectional axial loads (from cornering and braking) simultaneously. Its double-row structure and angular contact design form a stable force-bearing system, making it excellent at maintaining rotational precision under combined loads, which is crucial for wheel hub operation.

 

“C” represents the structural feature code, which reflects the bearing’s sealing performance. The “C” series typically means the bearing is equipped with a full-seal structure (such as double-lip rubber seals). This design effectively blocks the intrusion of water, dust, and other contaminants, while retaining lubricating grease, adapting to the complex working environments of vehicle hubs and reducing maintenance needs.

 

“40” is the inner diameter code. Following the calculation rule (inner diameter = code × 1), the inner diameter of this bearing is 40 × 1 = 40mm. This size is tailored to the shaft diameter of most passenger cars and light commercial vehicle hubs, ensuring precise matching with the axle system.

 

“68” is the outer diameter code. Combined with specific size rules, this series corresponds to a specific outer diameter range. In DAC40680042, it works with other parameters to determine the bearing’s outer diameter as 68mm, which is designed to fit the installation space of wheel hub assemblies and balance load-bearing capacity.

 

“0042” is the design sequence code. It is used to distinguish details such as material selection, heat treatment processes, or additional functions of bearings in the same type series. In this model, it helps identify specific manufacturing standards to ensure consistency in performance.

 

The tolerance grade is not directly marked in the DAC40680042 model and defaults to the normal grade (PN). This grade meets the requirements for dimensional accuracy and rotational precision in most vehicle wheel hub systems, ensuring stable operation under daily driving conditions.

 

In summary, DAC40680042 refers to a double-row angular contact ball bearing with a full-seal structure, 40mm inner diameter, 68mm outer diameter, and normal precision. It is widely used in passenger cars, SUVs, electric vehicles, and light commercial vehicles, playing a key role in working conditions requiring stable rotation, combined load resistance, and good sealing performance.

 

 

 

Product Application

The DAC40680042 wheel hub ball bearing is widely used in passenger cars, commercial vehicles, electric vehicles (EVs), SUVs, off-road vehicles, construction machinery, agricultural tractors, industrial conveyors, railway carriages, marine vessels, and precision equipment, among other fields.

 

Engineered to handle combined radial and axial loads with precision, this bearing excels in applications demanding stable wheel rotation and high reliability. In passenger cars and SUVs, it supports smooth handling and reduced road noise, with its sealed design protecting against water and dust to maintain long-term performance in daily commuting and highway driving. The bearing’s low-friction raceway design enhances fuel efficiency by minimizing energy loss during wheel rotation, a critical factor for modern eco-friendly vehicles.

 

Commercial vehicles such as trucks and buses rely on the DAC40680042 for its robust load-bearing capacity, enduring heavy payloads and repeated stress from start-stop operations. Its heat-resistant materials and precision machining ensure consistent performance under high-speed and high-temperature conditions, reducing maintenance downtime for logistics fleets. In electric vehicles, the bearing’s noise-free operation and high-speed stability align with EV requirements for quiet, efficient power transmission, while its corrosion-resistant surface treatment adapts to battery compartment environments.

 

Off-road vehicles and construction machinery benefit from its rugged design, capable of withstanding extreme vibrations and abrasive contaminants in mining, agriculture, and excavation sites. The bearing’s double-row ball structure distributes loads evenly, enhancing resistance to impact and misalignment—key for machinery operating on uneven terrain. Agricultural tractors and harvesters use it to maintain reliable wheel hub performance during prolonged field operations, where dust, moisture, and heavy loads are constant challenges.

 

Industrial applications, including conveyors and precision equipment, leverage the DAC40680042 for its high rotational accuracy and minimal radial play, ensuring smooth motion control in automated systems. Marine vessels and railway carriages adopt it for its saltwater resistance and durability in harsh, high-load environments, while its standardized dimensions facilitate easy integration into existing wheel hub systems.

 

From mainstream automotive to specialized industrial setups, the DAC40680042 balances load capacity, precision, and environmental adaptability, making it a versatile choice for any application requiring dependable wheel hub performance, reduced noise, and extended service life.

 

 

Product List

                                                                                               

Bearing No.	Dimension(mm)				Weight (kg)	Relative No.			Seal  Type
	d	D	B	C		SKF	FAG	KOYO
DAC37720052/45	37	72	52	45	0.70				D
DAC38700040	38	70	40	40	0.58				C
DAC38710233/30	37.99	71.02	33	30	0.50		38BWDD09	DAC3871W-2	A
DAC38720236/33	37.99	72.02	36	33	0.54			DAC3872W-3(-8)	A.B
DAC38740236/33	37.99	74.02	36	33	0.58		574795	DAC3874W-6	A
DAC38700037	38.1	70	37	37	0.52	636193A			C.D
DAC38700038	38	70	38	38	0.55			DAC3870BW	C.D
DAC38710039	38	71	39	39	0.62			DAC3871W-3	C.D
DAC38720034	38	72	34	34	0.46			DAC3872ACS42	B
DAC38720040	38	72	40	40	0.63			DAC3872W-10	C.D
DAC38730040	38	73	40	40	0.65			DAC3873-W	C
DAC38740040	38	74	40	40					B
DAC38740050	38	74	50	50	0.78	38BWD06	559192	NTNDE0892	B.G
DAC38740036	38	74	36	36	0.46				B.D
DAC39670037	39	67	37	37	0.46				B
DAC39680037	39	68	37	37	0.48	BA2B309692	540733		C.G.D.F
						311315BD309396
DAC39680737	39	68.07	37	37	0.48				C.D
DAC39720037	39	72	37	37	0.56	309639	542186A	DAC3972AW4	C.E
						BAHB311396B	(801663D)
DAC39720437	39	72.04	37	37	0.56	801663E			C.E
DAC39740036/34	39	74	36	34	0.62				B.D
DAC39740034	39	74	34	34	0.60				B
DAC39740038	39	74	38	38	0.65				B
DAC39740039	39	74	39	39	0.66	636096A	579557		B.D
DAC39/41750037	39/41	75	37	37	0.62	BAHB633815A	567447B		B.C
DAC40680042	40	68	42	42	0.51				C
DAC40720036	40	72	36	36	0.54				C
DAC40720037	40	72	37	37	0.55	BAHB311443B	566719		C.G.F
DAC40720036/33	40	72	36	33	0.54			DAC4072W-3CS35	A
DAC40720437	40	72.04	37	37	0.55	801663D			C.G
DAC40720637	40	72.06	37	37	0.55	-510004			C.G
DAC40730055	40	73	55	55	0.58				D
DAC40740036/34	40	74	36	34	0.58			DAC4074CWCS73	A
DAC40740036	40	74	36	36	0.60		AU0817-5	40BWD15	B.D
DAC40740040	40	74	40	40	0.66	801136	559493	DAC407440	B.D
DAC40740042	40	74	42	42	0.70			40BWD12	D
DAC40750037	40	75	37	37	0.62	BAHB633966	559494		B.C.D
DAC40760033	40	76	33	33	0.55		555800		B.D
DAC40760033/28	40	76	33	28	0.54	474743	539166AB		A