Changzhou Zhihua Bearings Co., Ltd.

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RNA Type Heavy Duty Needle Roller Bearings

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Changzhou Zhihua Bearings Co., Ltd.
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City:changzhou
Country/Region:china
Contact Person:Mrjames
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RNA Type Heavy Duty Needle Roller Bearings

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MOQ :50-2000
Packaging Details :Industrial Packing / Reference For Product Size
Delivery Time :5-30 Working Days
Payment Terms :T/T
Model Number :RNA
WhatsApp :8615851979614
Email :Info@czhbearings.com
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RNA Type Heavy Duty Needle Roller Bearings

NA69 RNA69 type heavy duty needle roller bearings have a through hardened outer ring which results in high static and dynamic load capacities and an ability to withstand overloading, shocks and vibration.They are particularly suitable for operations involving oscillating motion but may also accept high speed conditions where good alignment is necessary. This can more easily be achieved using a convex inner ring raceway (inner rings with suffix R6).The retention of the needles in the outer ring enables the bearing to be installed easily during assembly.

The shaft journal which is used directly as the inner ring raceway of the bearing should have adequate hardness and satisfactory surface finish. A hardness of 58-64 it will ensure full load capacity for the bearing. Lower hardness figures will entail a reduction in both static and dynamic capacities as shown in the table of dimensions.In cases of misalignment, a convex inner ring raceway can be machined directly at the shaft journal position by grinding, using a concave profile and inclining the diamond impregnated grinding wheel. A convex inner ring raceway calculated to permit misalignment of 1 in 1000 does not affect bearing load capacity. A larger convex radius is necessary for a greater degree of misalignment but this will reduce the effective bearing load capacity.

METRIC SERIES

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Bearing
Designation
Mass
(g)
Bearing
Designation
Mass
(g)
Boundary Dimensions(mm) Allow offset
(s)
Basic Load Rating(kN) Limiting Speed
(rpm)
d Fw D C rmin Dynamic Static
NA4822 1110 RNA4822 670 110 120 140 30 1 0.8 74.8 168 2640
NA4824 1170 RNA4824 730 120 130 150 30 1 0.8 79.6 186.4 2480
NA4826 1820 RNA4826 950 130 145 170 35 1.1 1 94.4 244 2240
NA4828 1600 RNA4828 1020 140 155 175 35 1.1 1 96.8 252 2080
NA4830 2720 RNA4830 1600 150 165 190 40 1.1 1.5 121.6 312 1920
NA4832 2900 RNA4832 1700 160 175 200 40 1.1 1.5 128 340 1840
NA4834 3990 RNA4834 2540 170 185 215 45 1.1 1.5 148 396 1760
NA4836 4190 RNA4836 2680 180 195 225 45 1.1 1.5 156 432 1680
NA4838 5620 RNA4838 3210 190 210 240 50 1.5 1.5 181.6 544 1520
NA4840 5840 RNA4840 3350 200 220 250 50 1.5 1.5 184.8 564 1440
NA4844 6370 RNA4844 3620 220 240 270 50 1.5 1.5 193.6 616 1360
(NA4848) 10000 (RNA4848) 5400 240 265 300 60 2 2 288 864 1200
(NA4852) 10800 (RNA4852) 5800 260 285 320 60 2 2 300 928 1120
(NA4856) 15500 (RNA4856) 9300 280 305 350 69 2 2.5 364 1040 1040
(NA4860) 22000 (RNA4860) 12700 300 330 380 80 2.1 2 500 1416 960
(NA4864) 23200 (RNA4864) 13400 320 350 400 80 2.1 2 512 1480 880
(NA4868) 24100 (RNA4868) 14000 340 370 420 80 2.1 2 524 1552 880
(NA4872) 25700 (RNA4872) 14800 360 390 440 80 2.1 2 532 1616 800
(NA4876) 44500 (RNA4876) 26000 380 415 480 100 2.1 2 800 2272 760

FAQ:

1. What is your the payment condition?

For regular products,No advance payment is needed, you can make 100% payment before shipment accordingly.

For customized products,our payment term normally is 30% of advance, the balance 70% against copy of BOL.

For our long term customers,you can pay 1 month after receiving the good.

2. What is your sales turnover?

Our whole year sales turnover in 2023 to 2024 is 11 million dollars

3. Do you have any certifications?

Yes, We are an IATF16949 certified needle bearings manufacturer since 2011.

4.What about the lead time?

Our production period is 30-45 days

5.What is your production capacity?

We are able to produce over 100 million pieces of bearings per year with different sizes and types

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