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GQZ 7204CDB Back‑To‑Back DB Duplex Angular Contact Ball Bearing 20×47×28mm 15° Contact Angle Preloaded Spindle Bearing

Name: GQZ 7204CDB Back‑To‑Back DB Duplex Angular Contact Ball Bearing 20×47×28mm 15° Contact Angle Preloaded Spindle Bearing
Brand: Wuxi Guangqiang Bearing Trade Co.,Ltd
SKU: 7204CDB
Price: 509.10 USD
Availability: InStock

Brand Name:	GQZ
Model Number:	7204CDB
MOQ:	100.PCS
Price:	negotiation
Delivery Time:	5 working days
Payment Terms:	T/T,Western Union,Paypal,MoneyGram

Detail Information

Product Description

Detail Information

Place of Origin:

CHINA

Certification:

ISO9001/ISO14001/GJB9001

Size:

18*31.7*21

Noise Level:

Low

Oem:

Available

Width:

Varies (e.g., 14mm, 15mm, 20mm)

Outer Diameter:

55mm

Inner Diameter:

120mm

Material:

Bearing Steel GCr15

Height:

36 Mm

Lubrication:

Grease Or Oil

Model:

CRB131107 CRB131310

Weight:

3.5KG

Precision Class:

P0, P6, P5, P4, P2

Other Name:

Ball Roller Bearing

Output:

Millimeter

Sealing:

Without

Precision Industries:

P0 P6 P5 P4

Apilication:

Hydraulic Pump

Load Type:

Radial Load

Ouside Diameter:

72mm

Feature:

Smooth

Hardness:

HR60-65

Oringin:

Wuxi China

Innerring:

Yes

Type Of Product:

Cylindrical Roller Bearing

Radial Clearance:

P0,P6,P5,P4

Bearing Number:

51117

Warranty:

12 Months

Collar:

With Eccentric Collar

Outerring:

Single Or Double Piece

Productname:

Angular Contact Ball Bearing

Bearing Thickness:

Various (see Description)

Greese:

As You Requirement, Such As SRL ,PS2, A

Thickness:

33mm

Cage:

Steel Cage,Brass Cage

Service:

OEM

Cagematerial:

Steel / Brass / Polyamide

Clearance:

C3, C4, C2, CO, C1 C2 0 C3 C4 C5

Bearing Size:

38x45x12 Mm

Sealing Type:

Open / Shielded / Sealed

Stock Qty:

125.pcs

Separable:

Yes

Delivery:

10-25 Days

Stock:

Plentiful

Rolling Element:

Steel Ball

Model No:

F-682626.RNU-BNS

Cage Material:

Metal/Brass

Precisiongrade:

P0, P6, P5, P4

Outside Size:

7.1/2inch

Appliexcavatorion:

Machine Tool

Bearing Material:

Gcr15|Chrome Steel

System Of Measurement:

Metric

Origin:

Wuxi

Loadtype:

Radial Load

Type:

Thrust Bearing

Precision Rating:

P6 P5 P4

Axial Load Capability:

Single-direction

Mass:

0.11 Kg

Seals Type:

Open

Type Of Bearing:

BA...Z, BAM

Sealingtype:

Open, Sealed, Shielded

Row No:

Single Row

Hs Code:

8482800000

Outer Packaging:

Paper Box.wooden Box

Bore Size:

0 - 60 Mm

Structure:

Deep Groove, Self-aligning

Sample:

Available

Packing:

Customer Requirement

Original:

Wuxi

Seal:

Z, ZZ, RS, 2RS

Inner Dia:

260MM

Industry:

Industrial Reducer Bearings

Gross Weight:

12.11kg

Limiting Speed:

21100

Seals:

Lip Seals On Both Sides

Bearing Type:

7030 AC

Main Market:

UK,Spain,Japan,USA,Germany,etc

Feture:

Angle >45, But Incl. Angle = 40

Row:

Double Row

Bore Siz:

35mm

Vibration:

Z2V2; Z3V3

Bearing:

751176MSP/5

Stock Quantity:

25 Piece

Type Name:

BSA210

Vibration Level:

V2,V3

Packaging Details:

Standard Carton Box

Supply Ability:

1000.pcs / Month

Highlight:

7204CDB duplex angular contact bearing

20x47x28mm spindle bearing

15° contact angle preloaded bearing

Product Description

1. Product Overview

The 7204CDB back‑to‑back (DB) duplex angular contact ball bearing consists of two 7204CD single bearings pre‑ground and matched back‑to‑back. With 15‑degree CD contact angle, DB arrangement provides high moment rigidity, bears combined radial load and bidirectional axial loads, factory pre‑preloaded to eliminate manual pairing errors.

It is widely used for precision machine tool spindles, high‑frequency motors and automation rotary positioning units.

👉 Get a quote within 24 hours for your project

2. Technical Specifications

Model: 7204CDB
Inner Diameter (ID): 20 mm
Outer Diameter (OD): 47 mm
Total Set Width: 28 mm
Single bearing width: 14 mm
Contact Angle: 15°
Structure: DB back‑to‑back duplex matched angular contact ball bearing
Material: GCr15 chrome bearing steel
Cage: Polyamide resin cage
Clearance: Pre‑loaded
Precision Grade: P0, P4 optional
Approx Net Weight: 0.21 kg
Dynamic Load Cr: 13400 N
Static Load C0r: 8300 N
Limiting Speed(Grease): 13800 rpm

👉 Full technical data and drawings available upon request

3. Key Advantages

DB back‑to‑back pairing structure offers excellent moment rigidity and anti‑tilting capacity
15° CD contact angle balances high‑speed performance and radial‑axial combined load capacity
Factory pre‑ground duplex matched set, fixed preload value saves on‑site adjustment work
Handles radial load together with bidirectional axial thrust force for precise shaft positioning
Open‑type structure supports external lubrication for continuous high‑speed operation
Custom design available (P4 precision grade, hybrid ceramic balls, OEM laser marking)

👉 Helps reduce maintenance cost and improve machine performance

4. Applications

This bearing is widely used in:

Precision machine tool spindles and grinding machine spindle assemblies
High‑frequency motors, testing instruments and automated rotary positioning equipment
Robotic joint components and high‑speed light‑cutting processing machinery
Various precision rotary mechanisms requiring high rigidity and bidirectional axial support

👉 Ideal for customers looking for reliable and long‑life bearing solutions

5. Why Choose GQZ Bearing

25+ years experience in industrial bearing manufacturing
Exported to 50+ countries worldwide
Rich experience in OEM DB duplex matched angular contact bearing custom projects
Strict duplex‑matching tolerance, contact angle and high‑speed simulation inspection before shipment
Fast response within 24 hours
Stable supply for long‑term cooperation

👉 We focus on quality, reliability, and long‑term partnership

6. Quality Control

Raw material hardness inspection
Precision grinding & superfinishing raceway machining
Heat treatment metallurgy control
Duplex matching tolerance, contact angle and rotation smoothness testing
Final dimensional & appearance inspection before delivery

👉 Ensuring consistent performance for every bearing set

7. Get a Quote Now

Looking for a reliable bearing supplier?

👉 Send your inquiry to get:

Fast quotation within 24 hours
Technical support from engineers
Custom duplex‑matched angular contact bearing matching solution suggestions
Competitive factory price

👉 Click “Send Inquiry” or contact us now

Wholesale High Speed Deep Groove Ball Bearings Hybrid Ceramic Ball Bearing 625 Bearings 2RS ZZ for Mechanical 1 GQZ 7204CDB Back‑To‑Back DB Duplex Angular Contact Ball Bearing 20×47×28mm 15° Contact Angle Preloaded Spindle Bearing

8. FAQ

Q1: Can you supply single loose 7204CD bearing without DB pairing?

Yes, single open bearing and DF face‑to‑face matched sets are available.

Q2: What is your delivery time?

Standard duplex matched angular contact bearings:10‑18 days

Custom high‑precision specification products: depending on specifications

Q3: Do you support bulk orders?

Yes, we provide stable supply for long‑term cooperation.

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Cylindrical Roller Bearing

Tapered Roller Bearing

Needle Roller Bearing

Spherical Roller Bearing

Self Aligning Ball Bearing

Thrust Ball Bearing

Thrust Roller Bearing

Pillow Block Bearing

Linear Ball Bearing

Track Roller Bearing

Thin Section Bearing

Slewing Ring Bearing

Spherical Plain Bearing

Ceramic Ball Bearings

Super Precision Bearings

Bearing Accessories

Stainless Steel Roller Chain

Mini Excavator

products details

GQZ 7204CDB Back‑To‑Back DB Duplex Angular Contact Ball Bearing 20×47×28mm 15° Contact Angle Preloaded Spindle Bearing

7204CDB duplex angular contact bearing

20x47x28mm spindle bearing

15° contact angle preloaded bearing