71804 CD/HCP4 Super-precision Angular Contact Ball Bearings, 15° Contact Angle, High-capacity Design

🔍

71804 CD/HCP4

Bore Diameter:20 mm

Outside Diameter:32 mm

Width:7 mm

Weight:0.017 kg

Min. Order:1 Piece

The 71804 CD/HCP4 Ultra-precision angular contact ceramic ball bearings are widely used in high-speed, high-precision applications and situations where there is a risk of shaft current, such as: high-speed machining center spindles, high-speed electric spindles, grinding machine spindles, lathe spindles, ball screw support mechanisms, and medical equipment (high-speed dental drills).

The 71804 CD/HCP4 bearing is a super-precision angular contact ball bearings with an inner diameter of 20 mm , an outer diameter of 32 mm, a width of 7 mm. It typically uses P4 grade precision tolerances and Carbon chromium steel rings, HC = Balls made of bearing grade silicon nitride Si3N4 (hybrid bearing) rolling mlement. Its dynamic radial rated load is approximately 3854 N, its static radial rated load is approximately 2613 N. open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

20 mm

Outside Diameter:

32 mm

Thickness:

7 mm

Weight:

0.017 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

3854 N

Static load Capacity, Radial (Cor):

2613 N

Reference speed (Grease rpm):

52936

Limiting speed (Oil rpm):

79871

Specifications:

Structure:

Angular Contact

Number of Rows:

Precision Rating:

Bearing Material:

Carbon chromium steel

Cage Type:

Cotton fabric reinforced phenolic resin or carbon fibre reinforced PEEK, outer ring centred

Seals Type:

open

Number of Balls:

Rolling Mlement Material:

HC = Balls made of bearing grade silicon nitride Si3N4 (hybrid bearing)

Bore Type:

Z = Cylindrical Bore

Operating Temperature:

-30 to +110 °C

System of Measurement:

Metric

Series:

718..-CD/HCP4

Rolling Element:

balls

Transaction Information:

Transport Package:

Standard Export Package

Service:

7*24 hour

Shipping Ways:

by Sea or Air

Country of Origin:

china

Stock:

100 Piece

Port:

Tianjin, Shanghai, Shenzhen, Guangzhou or Qingdao

Payment term:

by T/T in advance

Delivery time:

2-3 days for stock, 25-30 days for bulk production

Detailed description

71804 CD/HCP4 bearings ( 20 mm x 32 mm x 7 mm) have the advantages of ceramic balls materials, high speed, ultra-high precision and high thermal stability, corrosion resistant, non-magnetic, and are therefore widely used in the Machine tool spindles, high-speed electric spindles, precision instruments, aerospace and semiconductor equipment.

Part Number	71804 CD/HCP4
Bearing Type	super-precision angular contact ball bearings
Internal design	CD = 15° contact angle, high-capacity design
Series	718..-CD/HCP4
Weight [kg]	0.017
Units	Metric
Contact type	2-point contact
Accuracy class	P4
Rows NO.	1
Cage	Cotton fabric reinforced phenolic resin or carbon fibre reinforced PEEK, outer ring centred
Dimension series	ISO dimension series 18
Contact angle - α	15 °
Manufacturer Part Code	71804CD/HCP4
Bore Type	Z = Cylindrical Bore
Ring material	Carbon chromium steel
Ball material	HC = Balls made of bearing grade silicon nitride Si3N4 (hybrid bearing)
Balls qty（single row）	17
Temperature - T(min) [°C]	-30
Temperature - T(max) [°C]	+110
Single bearing - execution and preload	Single standalone bearing
Ring type	inner rings(1 piece), outer rings(1 piece)
Load Direction	Angular Contact
Seal type	open
Grease quantity - G_ref [cm³]	0.18
f₀ Calculation coefficient	16
Dimension
d φ Inside [inch]	0.787
D Φ Outside [inch]	1.260
B Width [inch]	0.276
r₁,r₂(min.) Chamfer [inch]	0.012
r₃,r₄(min.) Chamfer [inch]	0.006
r_a(max.) Fillet [inch]	0.012
r_b(max.) Fillet [inch]	0.006
d₁ [inch]	0.949
d₂ [inch]	0.949
D₁ [inch]	1.106
Balls diameter [inch]	0.125
Performance (Load Capacity and speeds)
C_r Dynamic Radial [lbf]	866
C_0r Static Radial [lbf]	587
P_u Fatigue Radial [lbf]	17
Attainable speeds (Grease) [r/min]	52936
Attainable speeds (Oil-air) [r/min]	79871
Abutment dimensions
d_a(min.) [inch]	0.866
d_b(min.) [inch]	0.866
D_a(max.) [inch]	1.181
D_b(max.) [inch]	1.228
d_n [inch]	0.965

The 71804 CD/HCP4 Ultra-precision angular contact ceramic ball bearings are primarily composed of high-precision bearing steel inner and outer rings, silicon nitride ceramic balls, and a cage. The cage is available in ball-guided polyamide (silent series) or brass. Contact angles are available in various specifications, including 15°, 25°, and 40°, with precision grades reaching P4 and above.

Ultra-precision angular contact ceramic ball bearings feature low-density ceramic balls, resulting in low centrifugal force, significantly improved limiting speed, and lower heat generation. The electrical insulation properties of the ceramic material effectively prevent electrolytic corrosion, extending bearing life. The silent series uses ball-guided polyamide cages to reduce vibration and noise, and optimized tolerances ensure more uniform load distribution and superior radial stiffness in bearing groups.

Share this product to:

Let more people see your product

How can you buy 71804 CD/HCP4 Super-precision Angular Contact Ball Bearings, 15° Contact Angle, High-capacity Design on the Internet?
High quality 71804 CD/HCP4 ( 0.017 kg Mass, ID: 20 mm OD: 32 mm WD: 7 mm , 718..-CD/HCP4 Series , 1 Rows , P4 Accuracy Class , Carbon chromium steel Material , 3854 Radial dynamic , 2613 Radial static ), Just click the button " Contact Now " to mention your purchase Requirement , Quantity and Contact Method of your requested Bearing Item No. 71804 CD/HCP4. then click the button " Send " The web site will make your purchasing information sent to the supplier's mailbox, who will come to contact you upon they get your information at the first time.

71804 CD/HCP4 Super-precision Angular Contact Ball Bearings, 15° Contact Angle, High-capacity Design

71804 CD/HCP4 Related Products »

Product Groups

Information

Category