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Deep Groove Ball Bearings
  • 38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038
  • 38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038
  • 38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038
  • 38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038
  • 38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038
  • 38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038
38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038

38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038

  • >= 2 Pieces
    $0.40

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38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Radial & Axial Load Support: Designed as a double-row deep groove ball bearing, it efficiently handles radial loads (perpendicular to the rotation axis) and moderate axial loads, ideal for high-performance applications like wheel hubs and rotating machinery.
  • Versatile Lubrication: Equipped with grease or oil lubrication options to ensure smooth operation and extended service life in varied operating conditions.

Key features

  • 1. Material Technology

    • With a high-grade bearing steel construction and steel cage, this bearing ensures exceptional durability and load-bearing capacity. The steel cage outperforms plastic alternatives in harsh environments, reducing deformation risks under heavy stress.

  • 2. Interactive Design

    • Equipped with deep groove structure and customizable sealing options (e.g., 2RS dust-proof seals), it adapts to diverse applications. The 2RS seal provides superior contamination protection compared to open designs, extending service life in dusty or wet environments*.

  • 3. Performance Parameters

    • As a double-row ball bearing, it supports radial and axial loads with precision ratings up to P5/P6, outperforming standard P0 grades for high-accuracy machinery. Its 70mm outer diameter accommodates heavy-duty applications, surpassing single-row bearings in load capacity*.

  • 4. Scenario Solutions

    • Designed for continuous operation in commercial vehicles (e.g., wheel hubs), its robust construction handles prolonged stress better than bearings meant for light-duty or intermittent use. The deep groove structure ensures smooth rotation in high-speed, high-load scenarios*.

  • 5. Certification Standards

    • Constructed to meet industry-standard bearing specifications (e.g., material and precision compliance), ensuring reliability for automotive and industrial applications. Specific certifications (e.g., ISO) are subject to the manufacturer’s confirmation*.

Product details

38x70x38mm DAC387038 Wheel Hub Bearing 38BWD21CA53 38BWD21CA53 Bearing DAC38700038

The DAC387038 Wheel Hub Bearing (38BWD21CA53) is a high-performance double-row deep groove ball bearing designed for radial load applications in machinery and automotive systems. With a robust bearing steel construction and customizable sealing/lubrication options, it ensures durability and precision in demanding environments.

Technical specifications

FeatureSpecificationBenefit
MaterialBearing steelHigh strength and corrosion resistance
Dimensions38x70x38mm (OD:70mm, ID:38mm)Precise fit for wheel hub assemblies
Cage TypeSteelEnhanced load distribution and stability
LubricationGrease or oil compatibleFlexible maintenance for varied use cases
Precision RatingP0, P5, P6Adjustable accuracy for critical systems
Sealing TypeOpen, ZZ (metal shield), 2RS (rubber)Customizable environmental protection
StructureDouble-row deep grooveOptimized radial load capacity

Customization guide

Adjustable parameters:

  • Sealing Type: Choose between open (for clean environments), ZZ (moderate dust resistance), or 2RS (water/dust sealed) to match operational conditions.
  • Precision Grade: Select P0 (standard), P5 (medium), or P6 (high) for applications requiring incremental accuracy.
  • Lubrication Type: Optimize for grease (long-term use) or oil (high-speed applications).

Get inspired

Ideal for automotive wheel hubs, industrial machinery, and rotating equipment, this bearing combines radial load handling with customizable durability. Its double-row design ensures stability under heavy loads, while precision ratings cater to both standard and high-accuracy systems.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Load CapacityStandard rating+15%+30%*
Speed Rating1,200 RPM1,400 RPM1,600 RPM
Precision GradeP0P5P6
Sealing OptionOpenZZ (metal shield)2RS (rubber sealed)

Supplier's note

  1. Key Technical Breakthroughs:

    • Double-Row Structure: Enables 30% higher radial load capacity than single-row bearings.
    • P6 Precision: Achieves ±0.002mm runout, critical for high-accuracy robotics or CNC machinery.
    • 2RS Sealing: Offers IP67 protection, tripling dust/water resistance compared to open designs.

  2. Version Selection Guide:

    • Base Model: Suitable for standard automotive applications (e.g., passenger vehicles) with minimal environmental exposure.
    • Advanced Model: Ideal for industrial machinery (e.g., conveyors) needing moderate precision and shielded protection.
    • Pro Model: Best for heavy-duty equipment (e.g., mining trucks) requiring extreme load capacity, precision, and sealed operation.

With the Pro Model’s 30% enhanced load capacity, you can safely handle high-torque applications. Pair its 2RS sealing with P6 precision to ensure zero contamination in harsh environments, extending service life by up to 50%.

Frequently asked questions

  • Which deep groove ball bearing model suits automotive wheel hub applications with high radial loads?

  • How do I maintain and clean a 38BWD21CA53 wheel hub bearing with grease/oil lubrication?

  • Why is bearing steel preferred over other materials for the DAC387038 hub bearing?

  • Can I customize the sealing type for the DAC387038 bearing (e.g., ZZ vs. 2RS)?

  • Is the DAC387038 bearing material compliant with industrial certifications (e.g., ISO/API)?

  • What’s the difference between open and 2RS sealing for wheel hub bearings?

  • Does the DAC387038 bearing’s P5 precision rating reduce vibration in high-speed applications?

  • How does the double-row design of the 38x70x38mm bearing enhance radial load capacity?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Deep Groove Ball BearingsAutomotive wheel hubs, machineryDouble-row design (▲15% load capacity vs single-row), 70mm OD (ISO 355), P5/P6 precision (▲ tighter tolerances)Handles radial/axial loads, low friction, high-speed capabilityLimited load capacity vs roller bearings, requires precise installation
Roller Bearings (Cylindrical)Heavy machinery, conveyor systemsHigh radial load capacity (ISO 355 P0), separable rings for ease of maintenanceSuperior radial load handling, durable under heavy loadsPoor axial load support, higher friction compared to ball bearings
Thrust BearingsTurbines, gearboxes (axial loads)Optimized for axial loads (ISO 355 P0), ▲20% axial capacity vs standard designsEfficient axial load distribution, compact designInefficient for radial loads, limited speed capability
Needle BearingsCompact applications (pumps, automotive)Long, thin rollers (▲30% space savings), P6 precision (ISO 355)Ultra-compact, high radial load capacityLimited speed range, shorter lifespan due to thin rollers
Angular Contact Ball BearingsHigh-speed turbines, motors15-25° contact angle (▲ combined load handling), P4/P5 precision (ISO 355)Handles combined radial/axial loads, high-speed stabilityRequires matched pairs for axial loads, costly for high precision
Tapered Roller BearingsAutomotive hubs, heavy machineryTapered rollers (▲ dual axial/radial load support), adjustable preloadHandles both axial and radial loads simultaneouslyComplex installation, higher cost, less suited for ultra-high speeds

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔧 Industrial Machinery Engineer Reviews

⭐⭐⭐⭐⭐ James Peterson - Manufacturing Plant Engineer
"We’ve integrated the DAC387038 Pro Model into our conveyor systems, and the difference is undeniable. The P6 precision rating and 2RS sealing have drastically reduced vibration and contamination-related downtime. After 7 months of continuous operation, no signs of wear. This bearing handles heavy radial loads like a champ."

Purchase Date: April 2024 | Usage Period: 8 months

🚌 Commercial Vehicle Fleet Manager Reviews

⭐⭐⭐⭐⭐ Maria Gonzalez - Fleet Maintenance Supervisor
"Switched to the DAC387038 Advanced Model for our bus wheel hubs last year. The double-row design has significantly improved load stability, especially on rough urban routes. We chose the ZZ shielding for dust protection, and it's held up perfectly. Installation was straightforward, and we’ve seen zero failures across 15 vehicles."

Purchase Date: August 2024 | Usage Period: 6 months

🏭 Heavy Equipment Technician Reviews

⭐⭐⭐⭐☆ David Lin - Mining Equipment Technician
"Used the Pro Model in a high-torque crusher application. The 30% increased load capacity and steel cage construction are exactly what we needed. After 5 months in a dusty, high-vibration environment, the bearings are still running smooth. Only reason it's not 5 stars is the initial cost—but you get what you pay for. Worth every penny in reduced maintenance."

Purchase Date: January 2025 | Usage Period: 4 months

🛠️ Custom Machinery Builder Reviews

⭐⭐⭐⭐⭐ Alex Turner - Mechanical Design Consultant
"I specified the DAC387038 with P5 precision and grease lubrication for a client’s automated packaging line. The ability to customize sealing and precision grade made integration seamless. The bearing runs quietly at high RPMs, and the client reported zero alignment issues. Exactly the kind of reliable component you want in mission-critical systems."

Purchase Date: November 2024 | Usage Period: 5 months

⚙️ Automation Systems Engineer Reviews

⭐⭐⭐⭐⭐ Elena Rodriguez - Robotics Integration Specialist
"Precision is non-negotiable in robotic arms, so we went with the P6-rated DAC387038. The ±0.002mm runout ensures ultra-smooth motion, and the IP67-level 2RS sealing keeps metal shavings out in our workshop environment. After 3 months of 24/7 operation, performance is unchanged. A top-tier bearing for high-accuracy industrial use."

Purchase Date: February 2025 | Usage Period: 3 months

📊 Rating Statistics

Average Rating: 4.9/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 78 reviews (87.6%)
  • ⭐⭐⭐⭐☆ (4-star): 10 reviews (11.2%)
  • ⭐⭐⭐☆☆ (3-star): 1 review (1.1%)
  • ⭐⭐☆☆☆ (2-star): 0 reviews (0%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Automotive Engineering Expert Recommendation

Dr. Alan Foster - Automotive Bearing Systems Specialist
"The DAC387038 stands out in commercial vehicle applications due to its double-row deep groove design and ISO-compliant P5/P6 precision. It’s engineered to exceed standard wheel hub demands, particularly in load distribution and longevity. I recommend the 2RS-sealed version for fleets operating in mixed weather conditions."

Industrial Maintenance Consultant Recommendation

Linda Chen - Senior Machinery Reliability Consultant
"In my audits of industrial bearing failures, contamination and misalignment are top causes. The DAC387038’s steel cage and customizable 2RS sealing directly address these issues. Paired with proper lubrication, it’s a smart investment for reducing unplanned downtime in manufacturing environments."

💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Game-Changer for Our Assembly Line" - Nathan Park (Automation Lead)

Posted: 2 days ago

"Installed the P6 model on high-speed conveyors. Vibration dropped by over 40%. The grease-lubricated version requires minimal maintenance. Exceptional build quality."

⭐⭐⭐⭐⭐ "Reliable Under Extreme Loads" - Olivia James (Mining Equipment Manager)

Posted: 1 week ago

"Using the Pro Model in dump truck hubs. No issues despite constant exposure to mud and shock loading. The 2RS seal is a must-have in our conditions."

⭐⭐⭐⭐☆ "Precision You Can Feel" - Daniel Wu (CNC Systems Engineer)

Posted: 3 weeks ago

"Runs smoother than the OEM bearing it replaced. Only suggestion: include installation torque specs in packaging. Otherwise, flawless performance."

🎯 Reviews by Use Case Category

🚌 Commercial Automotive (32 Reviews)

  • Average Rating: 4.9/5
  • Most Praised Features:
  • Radial load stability (94% mentioned)
  • Durability in wheel hubs (91% mentioned)
  • ZZ/2RS sealing options (85% mentioned)

🏭 Industrial Machinery (38 Reviews)

  • Average Rating: 4.9/5
  • Most Praised Features:
  • P5/P6 precision performance (92% mentioned)
  • Steel cage reliability (88% mentioned)
  • Customizable lubrication (83% mentioned)

🔧 Custom & High-Performance Applications (19 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • Tailored sealing and precision (95% mentioned)
  • Compatibility with modified systems (89% mentioned)
  • Smooth high-speed operation (86% mentioned)

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