Hangzhou Huaxing Kechuang Holding Group Co., Ltd. is one of the leading manufacturers and suppliers of precision bearings b7020-e-t-p4s-ul in China. As we have world-leading production equipment and strong manufacturing capabilities, we warmly welcome you to buy bulk high quality bearings at competitive price from our factory.

Angular Contact Ball Bearing-Precision Bearing-7020ACSUP4

Also know as S7020CDP4A, B7020-E-T-P4S-UL, 7020ACDP4

Technical Data

Inside Ø (mm):	80
Outside Ø (mm):	125
Width (mm):	22
Contact Angle:	15°
Seal:	Open
Rolling Element Material:	Steel
Cage Material:	Polyamide or Phenolic Resin
Tolerance Class:	P4S
Lubrication:	Grease or Oil
Product weight:	0,85kg

Type	Dimensions					Abutment dimension				Load rating		Speed value		Weight
	mm					mm				N		r/min		(kg)
	d	D	B	R min	r1 min	Da	da	Ra max	ra1 max	Cr	Cor	Noil	N grease
71920 C	100	140	20	0.6	0.6	127.2	132.0	0.6	0.6	51500	57000	14000	10500	0.8
71920 AC	100	140	20	0.6	0.6	127.2	132.0	0.6	0.6	48500	54000	12000	9000	0.8
7020 C	100	150	24	1.5	0.6	134.2	140.1	2.0	1.0	78000	83000	13500	10000	1.25
7020 AC	100	150	24	1.5	0.6	134.2	140.1	2.0	1.0	74000	79000	11500	8600	1.25

B7020-E-T-P4S-UL is a large-size, high-rigidity, universal paired all-steel super-precision spindle bearing for heavy-duty and medium-high speed high-end spindle systems. Each code represents exclusive performance and structural attributes:

B7020: Large-bore 7020 ultra-precision angular contact bearing (bore 100mm, outer diameter 150mm), belonging to large-scale spindle bearing specification, used for high-load and large-stroke spindle units.

E: 25° large contact angle, significantly enhanced axial rigidity and composite load capacity, core configuration for heavy-duty precision spindles.

T: High-strength fiber-reinforced resin window-type cage, high temperature resistance, low friction, anti-deformation, adapting to long-term high-load and high-speed continuous operation.

P4S: Ultra-high precision special grade, narrowed tolerance band, dimensional accuracy P4 level, rotational runout accuracy upgraded to P2 level, far higher than standard P4 bearings, ensuring ultra-precision stable rotation.

UL: Universal single bearing for free pairing. All single bearings have consistent tolerance parameters, allowing spindle manufacturers to arbitrarily match DB/DT/QBC combinations and adjust preload on demand, with strong assembly flexibility.

Features

Precision bearings is suitable for high radial and axial loads in one direction.
It has also an axial load carrying capacity on both sides in the X- or O-arrangement in pairs.
Accuracy grade: P4S (main dimensions at least according to ISO-tolerance class 4).
All running tolerances are classified according to ISO-tolerance class 2.
It is designed for a high running accuracy and high speeds with maximum rigidity and operational safety.
Seal: open design (without seal).
Exchange: 7020-E-T-P4S-UL, 7020CTA/P4S, 7020CTRP4 (NSK), 7020CD/P4A , 7020CTA P4 SUL.
Application: electric spindle, wood carving machine, engraving machine, CNC router, CNC machine, machine tool spindle bearing.

Applications

Relying on large-size specification, heavy-load rigidity, P4S ultra-precision and UL flexible pairing, this bearing is exclusively used for high-end large-scale CNC spindles and heavy-duty precision processing equipment, with precise application scenarios as follows:

4.1 Large Vertical & Horizontal Machining Center Spindles

It is the core matching bearing for heavy-duty machining centers, large gantry machining centers and five-axis linkage machining center spindles. It adapts to medium-heavy load semi-finishing and precision finishing of large mechanical parts, effectively suppressing spindle vibration and cutting deflection, ensuring high dimensional accuracy of large workpieces.

4.2 Heavy-Duty Precision Grinding Machine Spindles

Widely used in large surface grinding machines, external cylindrical grinding machines and precision roller grinding equipment. Its ultra-low runout and high rigidity eliminate grinding chatter, improve workpiece surface finish and roundness accuracy, and meet the high-precision processing requirements of shaft and sleeve parts.

4.3 Large High-Power Electric Spindle Units

Matched with high-power industrial electric spindles and large high-frequency motor spindles, suitable for mold heavy cutting, aerospace parts processing and automotive precision component batch production. It balances high-power load bearing capacity and high-speed operation stability, supporting long-term uninterrupted industrial production.

4.4 High-End Customized Spindle Equipment

Due to UL universal free pairing advantage, it is specially applicable for non-standard customized large spindles, special-purpose machine tool spindles and multi-bearing combined spindle systems. Spindle manufacturers can flexibly adjust assembly spacing and preload to adapt to personalized structural design and diversified working condition requirements.

4.5 Precision Heavy-Duty Industrial Processing Equipment

Suitable for large precision boring machines, milling and drilling composite processing equipment, semiconductor large-scale auxiliary processing equipment and heavy-duty automation precision rotating mechanisms, meeting the dual requirements of heavy-load operation and ultra-high precision transmission.

Advantages

∗ 30 years of dedicated development

HXB was founded in 1995, with nearly 30 years of dedicated development, HXB now operates6 subsidiaries.

∗ 2 high-tech R&D centers

∗ 2 modern manufacturing factories - Hangzhou Yijia Precision Bearing Co., Ltd. and Zhejiang Ruiyang Bearing Technology Co., Ltd.

∗ Supported by advanced digital MES and SPC management systems

∗ IATF16949:2016, ISO9001:2015 and ISO14001 certifications

∗ High-end equipment and high-quality material

About HXB

1. Hangzhou Factory - YJB

Founded in June 2007, YJB is located in Hangzhou. As a subsidiary of HXB Group, we are a national high-tech enterprise and provincial science & technology enterprise specializing in R&D and manufacturing of high-precision, high-speed, advanced, special and professional bearings.

Product Size: Inner diameter Φ3–Φ300mm
Precision Classes: P2, P4 (ultra-precision grades)
Annual Capacity: 3 million sets of precision bearings in a lean & intelligent factory

Main Products

Precision Spindle Bearings
Angular Contact Ball Bearings

Servo Motor Bearings
Vacuum Pump Bearings
Ball Screw Support Bearing

Certificates

Exhibition

FAQ

Q1: Why does this model adopt UL universal pairing design instead of factory fixed pairing?

A1: Large-size heavy-duty spindles have diverse structural designs and inconsistent assembly spacing and preload requirements. The UL universal single-bearing design allows manufacturers to freely match DB/DT combinations and fine-tune preload according to actual spindle structures, realizing customized assembly. It avoids the poor compatibility of fixed factory-paired bearings for non-standard large spindles, with higher application flexibility.

Q2: What is the difference between P4S precision and ordinary P4 grade?

A2: P4S is an upgraded ultra-precision grade with narrowed tolerance band. Its dimensional tolerance is P4 level, while the rotational runout accuracy is upgraded to P2 ultra-high precision level. It has lower vibration and higher repeat positioning accuracy than ordinary P4 bearings, which can maintain micron-level precision stability under long-term heavy-load operation, suitable for high-end precision processing scenarios.

Q3: Can this bearing be used for heavy roughing processing?

A3: It supports medium-heavy load semi-finishing and high-precision finishing, but long-term violent heavy roughing with strong impact is not recommended. Although it has high rigidity, long-term extreme impact load will cause raceway stress concentration, resulting in precision attenuation and shortened service life.

Q4: What lubrication method is most matched for this bearing?

A4: It is optimized for precision oil-air lubrication and oil mist lubrication. The large-size open internal structure ensures smooth lubricant circulation and rapid heat dissipation, avoids heat accumulation under long-term heavy-load operation, and maintains stable dynamic precision of large spindles.

Q5: What kind of manufacturers and equipment is this model targeted at?

A5: It is mainly for high-end spindle manufacturers engaged in large machining centers, heavy-duty grinding machines, customized high-power electric spindles. It is the preferred bearing for large precision processing equipment that requires heavy-load rigidity, ultra-high precision and flexible assembly adaptation.