71908CE/HCP4ADT Super-precision Angular Contact Ball Bearings, 15° Contact Angle, High-speed E Design

🔍

71908CE/HCP4ADT

Bore Diameter:40 mm

Outside Diameter:62 mm

Width:24 mm

Weight:0.176 kg

Min. Order:1 Piece

The 71908CE/HCP4ADT 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 71908CE/HCP4ADT bearing is a super-precision angular contact ball bearings with an inner diameter of 40 mm , an outer diameter of 62 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 15800 N, its static radial rated load is approximately 11854 N. open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.

Dimensions:

Inside Diameter:

40 mm

Outside Diameter:

62 mm

Thickness:

24 mm

Weight:

0.176 KG

Performance Data:

Dynamic load Capacity, Radial (Cr):

15800 N

Static load Capacity, Radial (Cor):

11854 N

Reference speed (Grease rpm):

37912

Limiting speed (Oil rpm):

57886

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

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:

719..-CE/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

71908CE/HCP4ADT bearings ( 40 mm x 62 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	71908CE/HCP4ADT
Bearing Type	super-precision angular contact ball bearings
Internal design	CE = 15° contact angle, high-speed E design
Series	719..-CE/HCP4A
Weight [kg]	0.176
Units	Metric
Contact type	2-point contact
Accuracy class	P4A
Rows NO.	2
Cage	Cotton fabric reinforced phenolic resin or carbon fibre reinforced PEEK, outer ring centred
Dimension series	ISO dimension series 19
Contact angle - α	15 °
Manufacturer Part Code	71908 CE/HCP4ADT
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）	19
Temperature - T(min) [°C]	-30
Temperature - T(max) [°C]	+110
Bearing set arrangement and preload	DT = Set of two bearings arranged in tandem <<
Ring type	inner rings(1 piece), outer rings(1 piece)
Load Direction	Angular Contact
Seal type	open
Grease quantity - G_ref [cm³]	1.4
f₀ Calculation coefficient	8.3
Dimension
d φ Inside [inch]	1.575
D Φ Outside [inch]	2.441
B Width [inch]	0.945
r₁,r₂(min.) Chamfer [inch]	0.024
r₃,r₄(min.) Chamfer [inch]	0.012
r_a(max.) Fillet [inch]	0.024
r_b(max.) Fillet [inch]	0.012
d₁ [inch]	1.831
d₂ [inch]	1.764
D₁ [inch]	2.134
D₂ [inch]	2.224
Balls diameter [inch]	0.250
Performance (Load Capacity and speeds)
C_r Dynamic Radial [lbf]	3551
C_0r Static Radial [lbf]	2664
P_u Fatigue Radial [lbf]	80
Attainable speeds (Grease) [r/min]	37912
Attainable speeds (Oil-air) [r/min]	57886
Abutment dimensions
d_a(min.) [inch]	1.701
d_b(min.) [inch]	1.654
D_a(max.) [inch]	2.315
D_b(max.) [inch]	2.362
d_n [inch]	1.890

The 71908CE/HCP4ADT 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 71908CE/HCP4ADT Super-precision Angular Contact Ball Bearings, 15° Contact Angle, High-speed E Design on the Internet?
High quality 71908CE/HCP4ADT ( 0.176 kg Mass, ID: 40 mm OD: 62 mm WD: 24 mm , 719..-CE/HCP4A Series , 2 Rows , P4A Accuracy Class , Carbon chromium steel Material , 15800 Radial dynamic , 11854 Radial static ), Just click the button " Contact Now " to mention your purchase Requirement , Quantity and Contact Method of your requested Bearing Item No. 71908CE/HCP4ADT. 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.

71908CE/HCP4ADT Super-precision Angular Contact Ball Bearings, 15° Contact Angle, High-speed E Design

71908CE/HCP4ADT Related Products »

Product Groups

Information

Category