RNA Type Heavy Duty Needle Roller Bearings

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.

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