NA 4840 Needle Roller Bearing
NA 4840
Bore Diameter:200 mm
Outside Diameter:250 mm
Width:50 mm
Weight:- kg
The NA 4840 bearing is a Needle Roller Bearing with an inner diameter of 200 mm , an outer diameter of 250 mm, a width of 50 mm. It typically uses P2 grade precision tolerances and Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
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Detailed description
Quick Details
Type: Needle,Roller
Bore Size: 200 mm
Outside Diameter: 250 mm
Model Number: NA4840
Precision Rating: ABEC-5(P5),P5
Seals Type: Open
Number of Row: Single Row
Structure: Needle
Dimension(mm): 200*250*50
Net Weight(kg): 5.58
Standard Bearing Materials: Standard Bearing
Materials Packing: Original S.K.F Package (Single Box Package)
Feature: High Precision/Long Life/Low Noise/Less Vibration
Quality Certificate: S.K.F Authorize And OEM With ISO 9001.2000
Packaging & DeliveryPackaging Detail: S.K.F Single Box Package Then Put In S.K.F Export Wooden Case.
Delivery Detail: Always About 5 - 7 Days After Oder Confirmed Via Airflight
Specificationsa) Good quality,competitive price
b) High-end technology&facilities
c) Original S.K.F
d) Professional team and servic
Needle roller bearings (needle bearing) with cylindrical roller is a roller bearing, relative to its diameter, roller both thin and long. This is called needle roller.
1.Despite the smaller cross section, has a higher load bearing capacity, with thin and long needle bearing roller (roller diameter D ≤ 5mm, L / D ≥ 2.5, L the length of the roller), therefore radial structure is compact, the diameter size and load capacity and other types of bearings, minimum diameter, especially for the radial bearing mounting dimensions restricted results.
2.Depending on different occasions, can be used without inner ring of the bearing or needle roller and cage assembly, this time to match the journal and the bearing surface and the shell holes as bearing directly on the surface of the inner and outer rolling surface,
3.in order to ensure the load capacity and operating performance and a ring bearing the same shaft or housing bore raceway surface hardness, machining accuracy and surface quality should be similar to the roller bearing rings. Such bearings can only bear radial load.
4.Needle roller bearings Features
With thin and long needle bearing roller (roller diameter D ≤ 5mm, L / D ≥ 2.5, L is the length of rollers), so the radial structure is compact, the diameter size and load capacity and other types of bearings minimum diameter, especially for radial mounting dimensions restricted support the results.
5.Depending on different occasions, can be used without inner ring of the bearing or needle roller and cage assembly, this time to match the journal and the bearing surface and the shell holes as bearing directly on the surface of the inner and outer rolling surface, in order to ensure the load capacity and operating performance and a ring bearing the same shaft or housing bore raceway surface hardness, machining accuracy and surface quality should be similar to the roller bearing rings. Such bearings can only bear radial load.
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