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
• Check for availability.
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
