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Bearing No. 7003 A DB DF DT WkBearings heavy duty for mining crusher

Bearing No. 7003 C DB DF DTWkBearings heavy duty for mining crusher

Bearing No. 7903 C DB DF DT WkBearings heavy duty for mining crusher

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Designed for small bore diameters (17-25mm), it has a compact structure, ideal for equipment with limited space (e.g., small motors, precision instruments).

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We will accept exchanges and returns of unworn and unwashed garments within 30 days of the date of purchase (14 days during the sales period).

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Size	Chest	Waist	Hips
XS	34	28	34
S	36	30	36
M	38	32	38
L	40	34	40
XL	42	36	42
2XL	44	38	44
All measurements are in INCHES and may vary a half inch in either direction.

Size	Chest	Waist	Hips
2XS	32	26	32
XS	34	28	34
S	36	30	36
M	38	32	38
L	40	34	40
XL	42	36	42
All measurements are in INCHES and may vary a half inch in either direction.

Size	Chest	Waist	Hips
XS	34	28	34
S	36	30	36
M	38	32	38
L	40	34	40
XL	42	36	42
2XL	44	38	44
All measurements are in INCHES and may vary a half inch in either direction.

Estimated Delivery: Sun, Feb 15 – Thu, Feb 19

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Single: Suitable for light, unidirectional load applications;
Back-to-Back (DB)/Face-to-Face (DF): Can bear bidirectional axial loads and enhance rigidity;
Tandem (DT): Capable of withstanding larger radial loads or unidirectional axial loads

d	D	B	r_min	r1_min	C_r	C_0r	C_r	C_0r	f_0	Grease	Oil	a	d_a_min	D_a_max
17	35	10	0.3	0.15	6400	3800	655	390		22000	30000	12.5	19.5	32.5

r_a_max	approx.	Single	Duplex	C_r	C_0r	C_r	C_0r	Grease	Oil	DB	DF	d_b (3) min.	D_b max.	r_b (3) max.
0.3	0.040	7003 A	DB DF DT	10400	7650	1060	780	17000	24000	25.0	5.0	18.2	33.8	0.15

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Category: Angular contact ball bearings

Mastery in manufacturing, dedication to service

Wankai Bearings makes heavy machinery operate more reliably.

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Engineered to Solve Your Toughest Challenges

Our bearings are designed with precision and durability to meet the demanding requirements of modern industrial applications.

Extended Service Life

High-wear alloy steel and precision grinding processes deliver 50% longer lifespan than standard bearings, even in heavy-load, high-speed applications.

Micron-Level Precision

±0.001mm machining tolerance and ISO 9001 certification ensure consistent performance, reducing equipment downtime and maintenance costs.

Extreme Environment Rated

Temperature-resistant (-40°F to 572°F) and corrosion-proof designs perform reliably in harsh industrial conditions.

Custom Engineered Solutions

Our 10-engineer team delivers tailored designs from concept to production, supporting low-volume custom orders with fast turnaround.

Rapid Delivery

In-stock items ship within 24 hours, custom orders in 3-5 days, with global logistics partners ensuring on-time delivery to North America.

Industry Certifications

ISO 9001, TS 16949, and RoHS compliant, meeting strict automotive and industrial quality standards for global markets.

Trusted Across Critical Industries

Specialized bearing solutions engineered for your industry's unique challenges

Automotive Transmission, axle, and EV motor bearings meeting TS 16949 standards. Get Appointment Construction Heavy-duty bearings for excavators, cranes, and earthmoving machinery. Get Appointment Renewable Energy Wind turbine main shaft and generator bearings for 20+ year service life. Get Appointment Industrial Machinery Precision bearings for CNC machines, pumps, and compressors. Get Appointment

What Our North American Customers Say

Real feedback from industry leaders who trust Wankai Bearings

"Wankai's bearings have reduced our equipment downtime by 40% in our manufacturing plant. The custom engineering team delivered exactly what we needed in just 4 days."

John Miller Maintenance Director, Ford Motor Company (MI)

"As a construction equipment rental company, we need bearings that can handle tough conditions. Wankai's tapered rollers outperform competitors by nearly double the lifespan."

Sarah Johnson Procurement Manager, United Rentals (TX)

"The precision of Wankai's ball bearings has improved our CNC machine accuracy significantly. Their customer service team is responsive and knowledgeable about industrial applications."

Michael Chen Plant Manager, Haas Automation (CA)

"We switched to Wankai for our wind turbine bearings last year, and have seen zero failures compared to our previous supplier. The cost savings have been substantial."

Emily Rodriguez Engineering Lead, NextEra Energy (FL)

Frequently Asked Questions

Get answers to the most common questions about our bearings and services

What is the typical lead time for custom bearings?

Our standard lead time for custom bearings is 3-5 business days for prototypes and 7-10 business days for production runs. For rush orders, we can deliver within 48 hours for an additional fee.

Do you offer samples before placing a bulk order?

Yes, we provide free samples (up to 5 units) of standard bearings and low-cost prototypes for custom designs. Shipping is free within the US and Canada.

What industries do your bearings serve?

We serve automotive, construction, renewable energy, industrial machinery, aerospace, medical devices, agriculture, marine, food processing, and material handling industries.

What certifications do your bearings meet?

Our bearings are ISO 9001, TS 16949, RoHS compliant, and meet ANSI/ABEC precision standards. We also comply with ASTM material standards and FDA requirements for medical applications.

Do you provide technical support for bearing selection?

Yes, our US-based technical team provides free bearing selection assistance, load calculation support, and application engineering to ensure you get the right bearing for your needs.

What is your warranty policy?

We offer a 2-year warranty on all standard bearings and a 1-year warranty on custom bearings against manufacturing defects. We also provide a performance guarantee for properly applied bearings.

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1466 Hidden Meadow Drive

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3566 Cambridge Drive

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Bearing No. 7003 A DB DF DT WkBearings heavy duty for mining crusher

Size Guide

Delivery

Store delivery FREE

Home or collection point from £35.00 FREE

Returns

Return

Returns in store FREE

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Mastery in manufacturing, dedication to service