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8mm Bore High Speed Deep Groove Ball Bearings 678 617/8 ZZ Minature 8 X12X3.5mm

Name: 8mm Bore High Speed Deep Groove Ball Bearings 678 617/8 ZZ Minature 8 X12X3.5mm
Brand: Beining Intelligent Technology (Zhejiang) Co., Ltd
SKU: 678 ZZ
Availability: InStock

Product Details

Place of Origin: China

Brand Name: CNBTZC or OEM

Certification: IATF16949:2016

Model Number: 678 ZZ

Payment & Shipping Terms

Minimum Order Quantity: 50000

Price: Please contact us,thanks

Packaging Details: plastic tub/middle box,carton,pallet

Delivery Time: 2-4 weeks

Payment Terms: L/C,T/T

Supply Ability: 500000pcs per month

Get Best Price

Product Details

Product Description

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                                                                                                                                                                                high speed deep groove ball bearings, deep groove ball bearings 678
                              

Model Numbers::	678 ZZ,678-ZZ,678-2Z	Bearing Seals:	Double Shielded ZZ - Shields On Two Sides,2RS Or Open Available
Interchange:	FAG 678-2ZR, NTN W678 ZZA,B678 ZZ	Clearance:	Standard

Model Numbers::	678 ZZ,678-ZZ,678-2Z
Bearing Seals:	Double Shielded ZZ - Shields On Two Sides,2RS Or Open Available
Interchange:	FAG 678-2ZR, NTN W678 ZZA,B678 ZZ
Clearance:	Standard

8mm Bore High Speed Deep Groove Ball Bearings 678 617/8 ZZ Minature 8 X12X3.5mm

617/8 678 ZZ Minature Deep Groove Ball Bearings 8mm X 12mm X 3.5mm Thin Section Robot Bearings

The 678 ZZ miniature deep groove ball bearing, with dimensions of 7mm inner diameter × 11mm outer diameter × 3mm width, is renowned for its compact size, high-speed capability, and low noise characteristics.

Bearing Number		Boundary Dimensions(mm)					Basic Load Rating(N)		Limiting Speed(rpm)		Reference(kg) Weight
		Inner Diameter	Outer Diameter	Width		Chamfer	Dynamic	Static	Grease	Oil	Reference(kg) Weight
		d	D	B	B1	r(min)	Cr	Cor	Non-contact		Wt ≈
617/3	ZZ	3	6	2	2.5	0.1	242	94	60000	71000	0.00020
617/4	ZZ	4	7	2	2.5	0.1	222	88	54000	63000	0.00028
617/5	ZZ	5	8	2	2.5	0.1	217	91	49000	57000	0.00032
617/6	ZZ	6	10	2.5	3	0.1	465	196	43000	51000	0.00065
617/7	ZZ	7	11	2.5	3	0.1	555	269	40000	47000	0.00067
617/8	ZZ	8	12	2.5	3.5	0.1	515	252	38000	45000	0.00075
617/9	ZZ	9	14	3	4.5	0.1	920	465	36000	42000	0.00140

678 ZZ Ball Bearings 8X12X3.5mm Specifications & Dimensions

Universal	678 ZZ
Type	Deep Groove Ball
Inner/Outer Ring/ Ball Material	Chrome Steel
Cage Material	Steel/Nylon
CageType	Punching
Precision	P0,P6
Inner Dimension d(Ø)(mm)	8
Outer Dimension D(Ø)(mm)	12
Width B (or T)(mm)	3.5
Lubrication	Grease
Load Direction	Radial
Specifications/Environment	Standard
Number of Raceway Ring Rows	Single Track
Size Standards	Metric Series

The 678 ZZ miniature deep groove ball bearing is widely used across various specialized fields due to its compact size and high precision. Application areas include:

1. Aerospace Engine Auxiliary Systems

In auxiliary systems such as fuel pumps and cooling fans, which require small rotating components, the compact size and high-speed performance of the 678 ZZ bearing are crucial.

2. Spacecraft Precision Mechanisms

For mechanisms like camera gimbals and solar panel steering systems, this bearing provides the necessary micro-scale support for high-sensitivity operations.

3. Drone Motors

The 678 ZZ bearing supports lightweight, low-noise operation in small drones, contributing to their efficient and quiet performance.

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