High precision Angular Contact Ball Bearing HRB 7005 AC P5 DBB

Bore Size:25 – 1000 mm

Outside Diameter:47 – 1500 mm

Customization:

Customized logo(Min. Order: 10 Pieces)

Customized packaging(Min. Order: 10 Pieces)

Product Description

High precision Angular Contact Ball Bearing HRB 7005 AC P5 DBB

Angular contact ball bearings are particularly suitable for carrying combined (axial and radial) loads. Sometimes, they also can carry pure axial load and operate in higher speed. Under radial load, axial component force will be produced which must be counteracted. So the bearings are normally adjust against a second bearing.
Single row angular contact ball bearings can carry axial load acting in one direction only. In many applications, angular contact ball bearings in pairs or muti-arrangement should be used. The axial load carrying capacity of angular contact ball bearings increases with the increase of contact angle.

Model	Dimesion(mm)
	d	D	T
7000AC	10	26	8
7002AC	15	32	8
7003AC	17	35	10
7004AC	20	42	10
7005AC	25	47	12
7006AC	30	55	13
7008AC	40	68	15
7030ACM	150	225	35
7032ACM	160	240	38
7038ACM	190	290	46
7040ACM	200	310	51
7044ACM	220	340	56
7217ACM	85	150	28
7222ACM	110	200	38
7224ACM	120	215	40
7226ACM	130	230	40
7228ACM	140	250	42
7302AC	15	42	13
7303AC	17	47	14
7304AC	20	52	15
7305AC	25	62	17
7306AC	30	72	19
7307AC	35	80	21
7307ACM	35	80	21
7308AC	40	90	23
7308ACM	40	90	23
7309AC	45	100	25
7309ACM	45	100	25
7310AC	50	110	27
7310ACM	50	110	27
7311AC	55	120	29
7311ACM	55	120	29
7312AC	60	130	31
7312ACM	60	130	31
7313AC	65	140	33
7313ACM	65	140	33
7314AC	70	150	35
7314ACM	70	150	35
7315AC	75	160	37
7315ACM	75	160	37
7316AC	80	170	39
7316ACM	80	170	39
7317AC	85	180	41
7317ACM	85	180	41
7318AC	90	190	43
7318ACM	90	190	43
7319ACM	95	200	45
7320ACM	100	215	47

High precision Angular Contact Ball Bearing HRB 7005 AC P5 DBB — hrb-7005-ac-p5-dbb-angular-contact-bearing

FAQ1: What does DBB mean in angular contact bearings?

DBB stands for Duplex Back-to-Back. It’s a common arrangement for mounting two angular contact bearings. In a DBB configuration, the wider sides (higher shoulders) of the outer rings face each other. This arrangement provides excellent rigidity and can accommodate axial loads in both directions, making it suitable for applications where moment loads are present.

FAQ2:What is the difference between P5 and P4 precision grades?

P5 and P4 are ISO precision grades for bearings, with P4 being a higher precision grade than P5.
P5 (ISO Class 5): This is a high-precision grade suitable for many demanding applications, including machine tool spindles, gearboxes, and other machinery requiring good rotational accuracy.
P4 (ISO Class 4): This is a super-precision grade, even more precise than P5. Bearings with P4 accuracy have tighter tolerances for dimensions, runout, and rotational accuracy. They are used in the most critical applications where extreme precision, minimal vibration, and maximum stiffness are required, such as ultra-high-speed CNC machine tool spindles, precision measuring equipment, and aerospace applications.
The difference lies in the manufacturing tolerances; P4 bearings are produced to even stricter specifications than P5.

FAQ3: How is HRB 7005 AC P5 used in CNC spindle systems?

An HRB 7005 AC P5 bearing is a high-precision angular contact ball bearing often used in CNC spindle systems due to its specific characteristics:
HRB: This refers to the manufacturer, Harbin Bearing Group, a common Chinese bearing manufacturer.
7005: This is the basic bearing designation. “70” indicates it’s a single-row angular contact ball bearing.
AC: This indicates a contact angle, typically 15 degrees, which is a standard contact angle for general-purpose angular contact bearings, offering a balance of radial and axial load capacity.
P5: This signifies a precision grade of P5 (ISO class 5), which is a high precision standard. This level of precision is crucial for CNC spindles to ensure high rotational accuracy, minimal runout, and consistent machining performance.
In CNC spindles, these bearings are often used in pairs (or sets of three or four) with a preload to achieve high stiffness and accuracy, supporting the cutting tool and resisting forces during machining.