7018 CB/HCP4A Super-precision Angular Contact Ball Bearings, 15° Contact Angle, High-speed B Design

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7018 CB/HCP4A

Bore Diameter:90 mm

Outside Diameter:140 mm

Width:24 mm

Weight:1.2 kg

Min. Order:1 Piece

The 7018 CB/HCP4A 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 7018 CB/HCP4A bearing is a super-precision angular contact ball bearings with an inner diameter of 90 mm , an outer diameter of 140 mm, a width of 24 mm. It typically uses P4A 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 28917 N, its static radial rated load is approximately 24799 N. open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

90 mm

Outside Diameter:

140 mm

Thickness:

24 mm

Weight:

1.2 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

28917 N

Static load Capacity, Radial (Cor):

24799 N

Reference speed (Grease rpm):

14871

Limiting speed (Oil rpm):

23897

Specifications:

Structure:

Angular Contact

Number of Rows:

Precision Rating:

P4A

Bearing Material:

Carbon chromium steel

Cage Type:

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

Seals Type:

open

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:

70..-CB/HCP4A

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

7018 CB/HCP4A bearings ( 90 mm x 140 mm x 24 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	7018 CB/HCP4A
Bearing Type	super-precision angular contact ball bearings
Internal design	CB = 15° contact angle, high-speed B design
Series	70..-CB/HCP4A
Weight [kg]	1.2
Units	Metric
Contact type	2-point contact
Accuracy class	P4A
Rows NO.	1
Cage	Cotton fabric reinforced phenolic resin or carbon fibre reinforced PEEK, outer ring centred
Dimension series	ISO dimension series 10
Contact angle - α	15 °
Manufacturer Part Code	7018CB/HCP4A
Bore Type	Z = Cylindrical Bore
Ring material	Carbon chromium steel
Ball material	HC = Balls made of bearing grade silicon nitride Si3N4 (hybrid bearing)
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]	14
f₀ Calculation coefficient	9.7
Dimension
d φ Inside [inch]	3.543
D Φ Outside [inch]	5.512
B Width [inch]	0.945
r₁,r₂(min.) Chamfer [inch]	0.059
r₃,r₄(min.) Chamfer [inch]	0.039
r_a(max.) Fillet [inch]	0.059
r_b(max.) Fillet [inch]	0.039
d₁ [inch]	4.280
d₂ [inch]	4.177
D₁ [inch]	4.921
D₂ [inch]	4.921
Performance (Load Capacity and speeds)
C_r Dynamic Radial [lbf]	6500
C_0r Static Radial [lbf]	5574
P_u Fatigue Radial [lbf]	191
Attainable speeds (Grease) [r/min]	14871
Attainable speeds (Oil-air) [r/min]	23897
Abutment dimensions
d_a(min.) [inch]	3.819
d_b(min.) [inch]	3.819
D_a(max.) [inch]	5.236
D_b(max.) [inch]	5.331
d_n [inch]	4.331

The 7018 CB/HCP4A 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.

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High quality 7018 CB/HCP4A ( 1.2 kg Mass, ID: 90 mm OD: 140 mm WD: 24 mm , 70..-CB/HCP4A Series , 1 Rows , P4A Accuracy Class , Carbon chromium steel Material , 28917 Radial dynamic , 24799 Radial static ), Just click the button " Contact Now " to mention your purchase Requirement , Quantity and Contact Method of your requested Bearing Item No. 7018 CB/HCP4A. 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.

7018 CB/HCP4A Super-precision Angular Contact Ball Bearings, 15° Contact Angle, High-speed B Design

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