| | | JNS | NTN | IKO | INA | | NK 21/20 | NK 21/20R | TAF 212920 | NK 21/20 |
| | INNERRING | WIITH
INNERRING | INNERRING | WIITH
INNERRING | INNERRING | WIITH
INNERRING | INNERRING | WIITH
INNERRING | | IR172120 | NKI 17/20 | IR17X21X20 | NK 21/20R + IR172120 | LRT172120 | TAFI 172920 | IR17X21X20 | NKI 17/20 |
| | NK21/20 MACHINED RING NEEDLE ROLLER BEARINGS WITHOUT INNER RING RNA49,RNA59,RNA69,NK TYPE |   | | | | | Dimensions(mm) | | Fw | D | C | 1)
γs min | | | | | | | 21 | 29 | 20 | 0.3 | | | | | | Standard
mounting
dimensions
Da
max
mm | Basic
dynamic
load
rating
Cr
N | Basic
static
load
rating
CorN | Limiting
speed
2)
rpm | Designation | Weight
g | | RNA 49 | RNA 59 | RNA 69 | NK | | 27 | 18 200 | 27 100 | 19 000 | ---- | ---- | ---- | NK 21/20 | 36 | 1) Smallest permissible chamfer dimension.
2) Suitable for oil lubrication. In case of grease lubrication, up to 60％ of this value.
NK type of 10mm or less inscribed circle diameter (FW) is without oil hols.
Oil hole on these small sizes is also available on request. | |
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