YP Petro manufactures power end components including extension rods, crossheads, crosshead pins, cross pin baffles, upper and lower guide plates, packing boxes, seal rings, and oil seal lips. We also supply crankshaft assemblies, gear sets, and connecting rods for major mud pump models.

Yes. YP Petro accepts OEM/ODM orders based on customer drawings, technical specifications, or reverse-engineered samples. Our engineering team can confirm feasibility, recommend material upgrades, and provide quotations within 3-5 working days.

What power end parts does YP Petro manufacture?

YP Petro manufactures power end components including extension rods, crossheads, crosshead pins, cross pin baffles, upper and lower guide plates, packing boxes, seal rings, and oil seal lips. We also supply crankshaft assemblies, gear sets, and connecting rods for major mud pump models.

What other fluid end parts does YP Petro supply?

In addition to cylinder liners, YP Petro supplies a complete range of fluid end parts, including pistons, piston rubber, valve bodies, valve seats, valve rubber, liner seals, cylinder head gaskets, valve cover seals, piston rods, clamp assemblies, valve covers, cylinder heads, flange heads, cylinder flanges, cylinder covers, and inhalation capsules. We also supply dampener diaphragms, pressure gauges, fittings, relief valves, and exhaust valves.

What size range of cylinder liners does YP Petro offer?

YP Petro cylinder liners are available in metric sizes from 100mm to 180mm and imperial sizes from 3" to 7.5" (including 3", 3.5", 4", 4.5", 5", 5.5", 6", 6.25", 6.5", 6.75", 7", 7.25", 7.5"). Custom sizes are available on request.

What is the difference between bi-metal, ceramic, chrome-plated, and high-frequency quenching cylinder liners?

Products

Home » Products » Drilling Rig Mud Circulation System » Drilling pump » Bearing » NSK HRB ZWZ NU/NJ/NUP/N/NF Series Cylindrical Roller Bearing

PRODUCT CATEGORY

NSK HRB ZWZ NU/NJ/NUP/N/NF Series Cylindrical Roller Bearing

NSK HRB ZWZ NU/NJ/NUP/N/NF Series Cylindrical Roller Bearing

Model:
all
Brand:
hebei yingpai
Code:
84139100


SKU:
Availability:



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Product Description

Product Description

Cylindrical Roller Bearings are designed to handle radial load at high performance and speed. According to the presence or absence of ribs, it can be divided into NU, NJ, NUP, N, NF, NH and other single-row cylindrical roller bearings, and NNU, NN and other double-row cylindrical roller bearings.

The bearing has a separable inner ring and outer ring structure.Pressed steel or machined brass cages are generally used, but sometimes molded polyamide cages are also used.

Technical specification

Some cylindrical roller bearings have no ribs on either the inner or outer ring, so the rings can move axially relative to each other. These can be used as free-end bearings. Cylindrical roller bearings, in which either the inner or outer rings has two ribs and the other ring has one, are capable of taking some axial load in one direction Double-row cylindrical roller bearings have high radial rigidity and are used primarily for precision machine tools.

Types NU, N, NNU, and NN are suitable as free-end bearings.
Types NJ and NF can sustain limited axial loads in one direction.
Types NH and NUP can be used as fixed-end bearings.
NH-type cylindrical roller bearings consist of the NJ-type cylindrical roller bearings and HJ-type L-shaped thrust collars.
The inner ring loose rib of an NUP-type cylindrical roller bearing should be mounted so that the marked side is on the outside.

Technical specification

Some cylindrical roller bearings have no ribs on either the inner or outer ring, so the rings can move axially relative to each other. These can be used as free-end bearings. Cylindrical roller bearings, in which either the inner or outer rings has two ribs and the other ring has one, are capable of taking some axial load in one direction Double-row cylindrical roller bearings have high radial rigidity and are used primarily for precision machine tools

Bearing No.			Boundary Dimensions (mm)			Basic Load Rating (KN)		Mass
Bearing No.			d	D	B	C	Co	kg
N208EM	NU208EM	NJ208EM	40	80	18	51.5	53.0	0.39
N209EM	NU209EM	NJ209EM	45	85	19	58.5	63.8	0.52
N210EM	NU210EM	NJ210EM	50	90	20	61.2	69.2	0.56
N211EM	NU211EM	NJ211EM	55	100	21	80.2	95.5	0.62
N212EM	NU212EM	NJ212EM	60	110	22	89.8	102.0	0.84
N213EM	NU213EM	NJ213EM	65	120	23	102.0	118.0	1.05
N214EM	NU214EM	NJ214EM	70	125	24	112.0	135.0	1.29
N215EM	NU215EM	NJ215EM	75	130	25	125.0	155.0	1.45
N216EM	NU216EM	NJ216EM	80	140	26	132.0	165.0	1.74
N217EM	NU217EM	NJ217EM	85	150	28	158.0	192.0	2.08
N218EM	NU218EM	NJ218EM	90	160	30	170.0	203.0	2.50
N219EM	NU219EM	NJ219EM	95	170	32	192.0	214.0	2.80
N220EM	NU220EM	NJ220EM	100	180	34	208.0	226.0	3.14
N222EM	NU222EM	NJ222EM	110	200	38	239.0	342.0	2.11
N224EM	NU224EM	NJ224EM	120	215	40	247.0	249.0	6.32
N226EM	NU226EM	NJ226EM	130	230	40	358.0	372.0	7.38
N228EM	NU228EM	NJ228EM	140	250	42	302.0	415.0	9.01
N230EM	NU230EM	NJ230EM	150	270	45	450.0	595.0	12.50
N232EM	NU232EM	NJ232EM	160	290	48	500.0	665.0	15.50
N234EM	NU234EM	NJ234EM	170	310	52	605.0	800.0	19.20
N236EM	NU236EM	NJ236EM	180	320	50	625.0	850.0	20.00
N238EM	NU238EM	NJ238EM	190	340	55	695.0	955.0	24.00
N240EM	NU240EM	NJ240EM	200	360	58	765.0	1060.0	28.60
N244EM	NU244EM	NJ244EM	220	400	65	760.0	1080.0	37.30
N248EM	NU248EM	NJ248EM	240	440	72	935.0	1340.0	50.40

bearing Roller Bearing Cylindrical Roller Bearing Hub Bearings Automotive Bearings Front Wheel Bearings

FAQ

Q YP Petro manufactures power end components including extension rods, crossheads, crosshead pins, cross pin baffles, upper and lower guide plates, packing boxes, seal rings, and oil seal lips. We also supply crankshaft assemblies, gear sets, and connecting rods for major mud pump models.

A
Yes. YP Petro accepts OEM/ODM orders based on customer drawings, technical specifications, or reverse-engineered samples. Our engineering team can confirm feasibility, recommend material upgrades, and provide quotations within 3-5 working days.
Q What power end parts does YP Petro manufacture?

A
YP Petro manufactures power end components including extension rods, crossheads, crosshead pins, cross pin baffles, upper and lower guide plates, packing boxes, seal rings, and oil seal lips. We also supply crankshaft assemblies, gear sets, and connecting rods for major mud pump models.
Q What other fluid end parts does YP Petro supply?

A
In addition to cylinder liners, YP Petro supplies a complete range of fluid end parts, including pistons, piston rubber, valve bodies, valve seats, valve rubber, liner seals, cylinder head gaskets, valve cover seals, piston rods, clamp assemblies, valve covers, cylinder heads, flange heads, cylinder flanges, cylinder covers, and inhalation capsules. We also supply dampener diaphragms, pressure gauges, fittings, relief valves, and exhaust valves.
Q What size range of cylinder liners does YP Petro offer?

A
YP Petro cylinder liners are available in metric sizes from 100mm to 180mm and imperial sizes from 3" to 7.5" (including 3", 3.5", 4", 4.5", 5", 5.5", 6", 6.25", 6.5", 6.75", 7", 7.25", 7.5"). Custom sizes are available on request.
Q What is the difference between bi-metal, ceramic, chrome-plated, and high-frequency quenching cylinder liners?

A
| Type | Inner Material | Hardness | Service Life | Best For |
| Bi-Metal | High-chromium cast iron | HRC 62 | 800h+ | General high-pressure, abrasive drilling |
| Ceramic | Al₂O₃ or Zirconia | HRC 80+ | 1500h+ | Extreme abrasion, high-sand formations |
| Chrome-Plated | Hard chrome coating | HRC 55 | 300-400h | Moderate conditions, budget operations |
| High-Frequency Quenching | Quenched alloy iron | HRC 50 | 200-300h | Light-duty, low-cost applications |