2). Structrue of Inner Bearing:

V Groove Non-Standard Door and Window Roller Bearings with Lots of Moulds

Bearing rings: Dimension tolerance, geometric tolerances, and surface quality of bearing's working surface will influent the operating noise. BY-ROL Bearing adopts precision CNC machining to dimension precision, geometric tolerances, design drawing, mold making, grinding, cleaning,  assembly, testing, every link of strict checks, so as to ensure all our products are tested by our strict criteria.

Balls:  The balls evenly with by the cage, often make rolling movement between 2 rings. The shape, size and number will directly influent bearing's load tolerance and operating capability. We use high precision, small vibration steel ball. It's surface must be strengthened, no bumps scratches, lacerations, pitting and notch.

Cage: Enclose and move with all or part of the balls. It also be used to insulate the balls, guide the balls’ movement and to improve lubrication performance inside the bearing., etc. BY-ROL Bearing’s cage is commonly made of cold rolling carbon steel. But in the corrosiveness environment, nonparallel or high-speed situation, stainless steel, engineering plastics cagecan be decided on request.

Shield: BY-ROL Bearing’s shield, taking the carbon steel material, if necessary,taking stainless steel or other material.

Seal: BY-ROL Bearing adopts different kind of seal material to meet the requirement of their operating in high temperature and being compatible with grease. Acrylonitrile-butadiene rubber is our standard material. but in high temperature environment ,often adopt fluorocarbons, silicone , PTFE shield.

Grease: The shield and seal were filled with standard grease. We can use different grease as request. High Quality Grease is very crucial in plastic injection process. 

3) . Our Advantages:         

V Groove Non-Standard Door and Window Roller Bearings with Lots of Moulds                                                                

OEM Service: We are a company specialzing in producing deep groove ball bearings & miniature bearings & plastic pulleys. We prodcue in accordance with customers' samples or drawings or applicaitons. Customers' brand is avaible on the bearings.

Various existing moulds: We have our own mould factory. Now with years' production, we have lots of existing moulds for customer's choice. If not, new moulds can also be produced out within 15 days.

Authentications: Our products have passed related authentications and have been widely adopted and favored by domestic and overseas customers.

Lead Time: To save lead time, the production, inspection and packaging is doing at the same time.

Machining Workshop: We keep introducting advanced equipments from Germany to meet customers' requirements for precision and production capacity.

1) Are you a factory or trading company?
A : We are a factory. We expert in door and window accessories since 2010, enjoy more than 10 years export history.

2) How can I get a sample to check your quality?
A:After price confirmation, you can require for samples to check our quality. If you just need a blank sample to check the design and paper quality, we will provide you sample for free, as long as you afford the express freight.

3) How long can I expect to get the sample?
A:After you pay the sample charge and send us confirmed files, the samples will be ready for delivery in 3-7 days. The samples will be sent to you via express and arrive in 3-5 workdays. You can use your own express account or prepay us if you do not have an account.

4) How long does the whole procedure being worked out?
A:After you place a order,the production handling time is about 20-30 days.
We need 15 days to prepare all the stuff then 30 days for manufacturing.

5) What about the transportation and delivery date?
A:Normally we use shipment to transport the goods.It is about 15-20 days.It also depends on which country and port you are.It could be shorter if you need to send the goods like Asian. If there are some emergencies we can send the goods via air express, as long as you afford the traffic expense.

6) When can I get the price?
We usually quote within 24 hours after we get your inquiry.If you are very urgent to get the price, please call us or tell us in
your email so that we will regard your inquiry priority.

7) What is the MOQ ?
MOQ=1000 pcs, better price with more quantity.

8) How does your factory do regarding quality control?
A:Quality is priority. our workers always attach great importance to quality control from the very beginning to the very end. each products will be inspected before packing.

-- For any detailed inquiry, pls contact us freely. We will make a response within 12 hours.

BY-ROL Bearings will be always here to assit you.

Sales Department:

Email: sales@by-rol.com;  by-rol@outlook.com