Na4907 Auto Needle Roller Bearing Super Finishing Stable Flexible

• Cage: Without Cage
• Rows Number: Single
• Style: Without Inner Ring
• Material: Bearing Steel
• Type: Closed
• Inner Size: 35mm
• Model NO.: NA4907
• Outer Size: 55mm
• Width: 20mm
• Weight: 0.186kg
• Service: 24h
• OEM: Support
• Sameples: Availiable
• Address: Liaocheng,Shandong
• Model Name: Needle Roller Bearing
• Delivery Time: 15days as Your Quantity
• Factory or Trader: Factory
• Material Quality: High Quality
• Transport Package: Plastic Bag+Carton+Pallet
• Specification: 0.186kg
• Trademark: Haisai
• Origin: Liaocheng, Shandong
• HS Code: 8482101000
• Production Capacity: 100000pieces/Month

Product Description

PRODUCT DESCRIPTION
Needle roller bearings (needle bearing) is a cylindrical roller with a roller bearing, relative to its diameter, roller both thin and long. This is called needle roller. Despite having a smaller cross-section, has a higher load bearing capacity, equipped with a thin and long needle bearing roller (roller diameter D<5mm, l="">2.5, L is the length of the roller), therefore radial structure is compact, its diameter size and load capacity and other types of bearings, minimum diameter, especially for radial mounting dimensions restricted support structure.

According to different occasions, can be used without inner ring of the bearing or needle roller and cage assembly, when the surface of the journal bearing surface and shell holes as bearing directly match the outer rolling surface, in order to ensure the load capacity and operating performance and have the same ring bearing, shaft or housing bore raceway surface hardness, machining accuracy and surface quality should be similar roller bearing rings. Such bearings can only bear radial load.
CATALOGUE

	NA   49..RS	NA   49..2RS	d		F		D		C		B		rS
														C	Co
mm			mm						Min					N		rpm
10	NA 4900 RS	NA 4900.2RS	10		14		22		13		14		0.3	6800	6900		13000
12	NA 4901 RS	NA 4901.2RS	12		16		24		13		14		0.3	7600	8300		12000
15	NA 4902 RS	NA 4902.2RS	15		20		28		13		14		0.3	8600	10300		10000
17	NA 4903 RS	NA 4903.2RS	17		22		30		13		14		0.3	8800	11000		9000
20	NA 4904 RS	NA 4904.2RS	20		25		37		17		18		0.3	17300	19900		7500
25	NA 4905 RS	NA 4905.2RS	25		30		42		17		18		0.3	19300	24200		6500
30	NA 4906 RS	NA 4906.2RS	30		35		47		17		18		0.3	21100	28500		5500
35	NA 4907 RS	NA 4907.2RS	35		42		55		20		21		0.6	26500	39500		4800
40	NA 4908 RS	NA 4908.2RS	40		48		62		22		23		0.6	36000	53000		4200
45	NA 4909 RS	NA 4909.2RS	45		52		68		22		23		0.6	38000	59000		3900
50	NA 4910 RS	NA 4910.2RS	50	58		72		22		23		0.6		40000	64000

COMPANY INTRODUCTION
Haisai bearing is a regular model industrial manufacturing enterprise integrating bearing product research and development, design, manufacturing, import and export trade. The company was founded in 1998, covers an area of more than 90,000 square meters, plant area of more than 20,000 square meters, more than 200 employees, more than 20 technical engineers, has passed the international/SO9001:2008,1SO/TS16949:2009 and other quality management system certification. In addition, we have two factories (located in Shanghai and Liaocheng respectively) and a trading company. We have completed the high-speed forging of bearing steel dock, automatic high-precision grinding, cryoquenching, unitized automatic constant temperature grinding, intelligent assembly and so on, complete profession production. The product size from 30mm-750mm covers single and double row tapered roller bearing, British garden taper roller bearing, deep groove ball bearing, stainless steel shaft reducer special bearings, agricultural equipment bearings, a total of more than 2500 specifications of products.
We have a professional team of excellent quality, the technical center is equipped with all kinds of testing machines, high-precision testing instruments,material analysis instruments and more than 60 sets, for users to design develop, trial-produce all kinds of special purpose bearings, and do our best to provide high-end customers around the world with the best solutions and good after-sales service!
We has many years of experience in the industrial field of bearing supporting and industrial service, the products are exported to the United States, Germany, Italy, France, the Czech Republic, Russia and other European and American countries and supporting enterprises. We both at home and abroad enjoy a good business reputation!
We promise to be responsible for every set of bearings and industrial products sold! Make every customer satisfied, is our constant pursuit!


Certification
FAQ
Q:What's your after-sales service and warranty?
A: We promise to bear the following responsibilities when defective products were found:
1. Replacements would be sent with goods of your next order;
2. Refund for defective products if customers require.

Q:Do you accept ODM&OEM orders?
A: Yes, we provide ODM&OEM services to worldwide customers, we also customize OEM box and packing as your requirements.

Q:What's the MOQ?
A: MOQ is 10pcs for standardized products; for customized products, MOQ should be negotiated in advance. There is no MOQ for sample orders.

Q:How long is the lead time?
A: The lead time for sample orders is 3-5 days, for bulk orders is 5-15 days.

Q:Do you offer free samples? 
A: Yes we offer free samples to distributors and wholesalers, however customers should bear freight. We DO NOT offer free samples to end users. 

Q:How to place order?
A: 1. Email us the model, brand and quantity,shipping way of bearings and we will quote our best price for you; 
2. Proforma Invoice made and sent to you as the price agreed by both parts; 
3. Deposit Payment after confirming the PI and we arrange production; 
4. Balance paid before shipment or after copy of Bill of Loading.