Demek Top Quality Needle Roller Bearings Manufacturer

• Customization: Available
• Load Direction: Radial Bearing
• Material: Bearing Steel
• Model NO.: HK, K, NK, NA, HJ series
• OEM Service: Provide
• Application: All Types of Machinery
• Certificate: ISO9001
• Rolling Body: Roller Bearings
• The Number of Rows: Single
• Outer Dimension: Small and Medium-Sized (60-115mm)
• Spherical: Non-Aligning Bearings
• Separated: Separated
• Transport Package: Industrial Package
• Specification: P0, P6, P5
• Trademark: DEMEK
• Origin: China
• HS Code: 84824000
• Production Capacity: 200000 PCS/Month

Product Description

DEMEK Top Quality Needle Roller Bearings Manufacture

1. Instruction of Needle Roller Bearings:
Needle roller bearings are roller bearings with cylindrical rollers that are small in diameter. In spite of their low cross section, needle roller bearings have a high load carrying capacity and are therefore extremely suitable for bearing arrangements where radial space is limited.

2. Needle roller bearings design include:

- Drawn Cup Needle Roller Bearings
- Solid Cup Needle Roller Bearings
- Cage and Needle Roller Assemblies
- Inner rings for Needle Roller Bearings
- Cam and Roller Followers
- Needle Rollers
- Needle Roller Thrust Bearings
- Combined Needle Roller Bearings
Model HK, TA, TLA, open-end drawn cup needle roller bearings with retainer,
Model BK close-end drawn cup needle roller bearing with retainer,
Model SCE, BA, J, JH, drawn cup needle roller bearings (Inch series). 

 

3. Application:

Automotive transmissions, air-conditioner compressors, bulldozer blades, 

overhead traveling cranes, gearboxes, machine tool spindles, copying machines and many more. 

4. General Drawings of some types of Needle Roller Bearings:





5. More Part Numbers of Needle Roller Bearings We Produce:

 

model	inner diameter	outer diameter	width
HJ101812	15.8750	28.5750	19.0500
HJ101816	15.8750	28.5750	25.4000
HJ122012	19.0500	31.7500	19.0500
HJ122016	19.0500	31.7500	25.4000
HJ142212	22.2250	34.9250	19.0500
HJ142216	22.2250	34.9250	25.4000
HJ162412	25.4000	38.1000	19.0500
HJ162416	25.4000	38.1000	25.4000
HJ182616	28.5750	41.2750	25.4000
HJ182620	28.5750	41.2750	31.7500
HJ202816	31.7500	44.4500	25.4000
HJ202820	31.7500	44.4500	31.7500
HJ223016	34.9750	47.6250	25.4000
HJ223020	34.9250	47.6250	31.7500
HJ243316	38.1000	52.3875	25.4000
HJ243320	38.1000	52.3875	31.7500
HJ263516	41.2750	55.5625	25.4000
HJ263520	41.2750	55.5625	31.7500
HJ283716	44.4500	58.7375	25.4000
HJ283720	44.4500	58.7375	31.7500
HJ303920	47.6250	61.9125	31.7500
HJ324116	50.8000	65.0875	25.4000
HJ324120	50.8000	65.0875	31.7500
HJ364824	57.1500	76.2000	38.1000
HJ364828	57.1500	76.2000	44.4500
HJ405224	63.5000	82.5500	38.1000
HJ405228	63.5000	82.5500	44.4500
HJ445616	69.8500	88.9000	25.4000
HJ445624	69.8500	88.9000	38.1000
HJ445628	69.8500	88.9000	44.4500
HJ486024	76.2000	95.2500	38.1000
HJ486028	76.2000	95.2500	44.4500
HJ526828	82.5500		44.4500
HJ567232	88.9000		50.8000
HJ607632	95.2500		50.8000

 

Shaft diameter	Bearing Modle		weight	Dimension				Rated load
			Mass
Shaft	Bearing Designation		Approximate value	BoundaryDimensions				BasicLoadRating		Limiting Speed
Diameter			Approx	d	Fw	D	B			Oil
								Dynamic	Static
mm	CurrentCode	OriginalCode	g	mm				N		rpm
5	NA495		7	5		13	10	2670	2350	34000
	NA495TN		7	5		13	10	2670	2350	34000
6	NA496		9	6		15	10	3150	3000	32000
7	NA497		12	7		17	10	3600	3650	30000
8	NKI8/16			8	14	25	16	12400	11300	21500
	NA498		16	8		19	11	4300	3950	28000
9	NKI9/12		16.6	9	12	19	12	6200	7000	21700
	NA499		17	9		20	11	4850	4900	26000
	NKI9/16		21.9	9		19	16
10	NKI10/16		27.3	10	14	22	16	9800	10500	19650
	NA4900	4524900	21	10	14	22	13	8000	9000	23700
	NA6900	6534900	38.4	10	14	22	22	9000	11000	23700
12	NA4901	4524901	25.1	12	16	24	13	9000	10800	20000
	NKI12/20		39	12	16	24	20	14000	18400	21000
	NA6901	6534901	44.5	12	16	24	22	6000	21600	20000
	NKIS12		58	12	18	30	16	16000	17000	20000
	NA12X32X15V			12		32	15
15	NKI15/16		38	15	19	27	16	8800	12800	19100
	NKI15/20		45.7	15	19	27	20	12300	19000	19100
	NA4902	4924902	32	15	20	28	13	6400	9000	18000
	NA6902	6534902	61.6	15	20	28	23	13100	20900	18000
	NKIS15		90	15	22	35	20	23500	24000	17000
	NA5902		52	15	20	28	18
	NAI53212			15		32	12
	74802	74802		15		36	25.4
16	NKIS16			16		28	16	13000	17400	22000
	NA16X36X24			16		36	24
17	NKI17/16		41.1	17	21	29	16	13000	18200	20000
	NA4903	4544903	32.8	17	22	30	13	7000	10000	17000
	NA6903	6534903	68.2	17	22	30	23	14400	24900	17000
	NA5903		56	17	22	30	18	15200	21700	18000
	NA17			17		37	20
20	NKI20/16		48.5	20	24	32	16	10800	17000	16700
	NA4904	4524904	70.2	20	25	37	17	21000	25000	17000
	NKIS20		119	20	28	42	20	28000	35500	15000
	NA6904	6254904		20	25	37	30	36000	51000	17000
	NA5904			20	25	37	23
22	NKI22/16		50	22	26	34	16	15300	23600	17000
	NA49/22		76	22	28	39	17	22000	29500	15000
	NA69/22		130	22	28	39	30	37500	55000	15000
	NA223934			22	28	39	34
23	NA2020			23		42	22
25	NKI25/30		115	25	29	38	30	31500	56000	14000
	NA4905	4524905	76	25	30	42	17	23600	31500	14000
	NA6905	6534905	138	25	30	42	30	29000	59000	14000
	NKIS25		160	25	32	47	22	32000	55000	13000
		F-208277		25	32	47	22
	NKl25/20			25	29	38	20	21900	34000	15000
	NA5905		139	25	30	42	23	30500	43000	13000
28	NA49/28	45449/28	98	28	32	45	17	24000	33500	14000
	NA69/28		170	28	32	45	30	40500	63000	14000
	NKI28/20			28	32	42	20	23000	37500	14000
30	NA4906	4544906	115	30	35	47	17	25000	35500	13000
	NA5906	6534906	152	30	35	47	23
	NA6906			30	35	47	30	43500	71000	13000
	NKI30/20			30	35	45	20	24000	42500	13000
	NKI30/30			30	35	45	30	36500	69000	13000
32	NK132/20			32	37	47	20	24900	43900	12000
		TAFI324720		32	37	47	20	24900	43500	12000
	NA49/32	45449/32	150	32	40	52	20	24900	43500	12000
	NA69/32	66349/32	272	32	40	52	36	100000	100000	11000
35	NKI35/30		165	35	40	50	30	39000	79000	11000
	NA4907	4524907	151	35	42	55	20	19800	41500	11000
	NA6907	6534907	301	35	42	55	36	26000	60500	11000
	NKIS35		220	35	43	58	22	33000	56000	9500
	NA5907		256	35	42	55	27
40	NKI40/20		124	40	45	55	20	22000	48000	10000
	NKI40/30		184	40	45	55	30	35000	86000	10000
	NA4908	4544908	240	40	48	62	22	42000	65000	8500
	NA6908		401	40	48	62	40	64000	112000	8500
	NA5908		348	40	48	62	30	53000	92500	8500
42	NKI42/20		138	40	47	57	20	26000	52500	9500
45	NKI45/25		218	42	50	62	25	36000	70000	8500
	NKI45/35		289	42	50	62	35	41500	102000	8500
	NA4909	4544909	260	45	50	68	22	37000	96500	8000
	NA6909	6534909	479	45	50	68	40	61500	123500	8000
	NKIS45		306	45	55	72	22	43000	71000	7500
	NA5909		396	45	50	68	30
50	NKI50/25	TAFI506825	262	50	55	68	25	32000	78000	7500
	NA4910	4544910	264	50	58	72	22	41000	72000	7500
	NA5910			50	58	72	30
	NA6910	6534910	457	50	58	72	40	68000	135000	7500
	NKIS50		510	50	60	80	28	60000	95000	7500
	NKI50/35	TAFI506835		50	55	68	35	53000	118000	7500
55	NKI55/35		357	55	60	72	35	48000	126800	7500
	NA4911	4544911	386	55	63	80	25	50600	96580	7500
	NA5911			55	63	80	34
	NA6911	6534911	790	55	63	80	45	82560	172000	7500
60	NKI60/25		388	60	68	82	25	35500	85000	7000
	NA4912	4544912	412	60	68	85	25	52800	110500	6500
	NA5912		614	60	68	85	34
	NA6912	6534612	798	60	68	85	45	88500	186000	6500
	NKIS60		550	60	70	90	28	65000	110000	6500
65	NA4913	4544913	435	65	72	90	25	57500	110500	6500
	NA6913	6534913	821	65	72	90	45	87600	194500	6500
	NKI65/25			65	73	90	25	53000	100000	6500
	NKI65/35			65	73	90	35	75000	156000	6500
70	NA4914	4544914	712	70	80	100	30	79000	154000	5500
	NA6914	6534914	1326	70	80	100	54	121000	263000	5500
	NKI70/35			70	80	95	35	78000	184000	5500
75	NA4915	4544915	765	75	85	105	30	82000	158000	5500
	NA5915		1130	75	85	105	40
	NA6915	6534915	1429	75	85	105	54	128000	272000	5500
80	NA4916	4544916	870	80	90	110	30	81000	170500	5500
	NA6916	6534916	1510	80	90	110	54	130500	280600	5000
	NKI80/35			80	90	110	35	103000	208000	5000
85	NKI85/26			85	95	115	26	73000	137000	4800
	NKI85/36		1040	85	95	115	36	107000	223000	4800
	NA4917	4544917	1250	85	100	120	35	111000	237000	4600
	NA6917	6534917	2200	85	100	120	63	166000	400000	4600

NA, RNA type
CLUNT standard needle roller bearings NA type, outer side with ribs or elastic locking collar, no inner wall. And a single and double row roller two structural types. And whether single or double row needle roller bearings, inner ring can be made of the NA-type or without inner structure type RNA type.
An annular lubrication grooves and lubrication holes large series of needle roller bearing outer ring. NA-type needle bearing outer ring assembly (outer ring, needle roller and cage) can not be separated, but if the inner ring can be separated from the outer components.
Needle roller bearings without inner ring in direct contact with the journal surface, can further reduce bearing radial mounting position size requirements. But requires the journal surface hardness and dimensional accuracy should meet the technical requirements of the respective bearing raceways.
 
NAV, RNAV type
NAV type and RNAV type is not with cage full complement needle roller bearings. Type in the NA and RNA derived based on the bearing structure. Its carrying capacity greater than the NA type and RNA type bearings, but the speed is lower than the performance of NA type and RNA type bearings. At high speed is not suitable for working conditions to use.
 
NAO type
NAO inner and outer rings no wall, there are single or double row needle. When the double row needle, outer ring with lubrication grooves and lubrication holes.
 
K type
   K type known as "needle roller and cage assembly," no bearing inner and outer rings of the structure. It is the smallest radial bearing a class of bearings. Which the shaft surface and bearing surface to work as a raceway, therefore, requested with matching hardness and dimensional accuracy of the shaft surface and the bearing surface shall be substantially meet the corresponding technical requirements bearing raceways.
 
Long cylindrical roller bearings
Long cylindrical roller bearings, bearing similar characteristics with the use of needle roller bearings, but radial cross-section than the large size bearings needle roller bearings, and therefore can withstand greater radial load.
Long cylindrical roller bearings and needle roller bearings needle, its ratio of length to diameter (aspect ratio) greater than 3, the difference lies in long cylindrical roller bearing roller diameter greater than 5 mm. Therefore, in a structural form, long cylindrical roller bearings and needle roller bearings have many of the same structure.
Long cylindrical roller bearings with needle bearings, can only bear the pure radial load, can not limit the axial displacement of the bearing, bearing installation, it does not allow the axis of the inner and outer ring axis angular error generated.
 
NAOL type
NAOL type and needle roller bearing NAO same structure. Inner and outer rings are no ribs,
 
NAL type
NAL same type and NA-type needle bearing structures. Outer side with ribs or elastic locking collar, no inner wall.


6. Contact US: