Needle bearings with entire borders


Track rollers - Needle bearings with entire borders

Technical Drawing and Exploded View  - Needle bearings with entire borders


1. Outer ring
2. Needle rollers
3. Cage
4. Inner ring


Technical Data - Needle bearings with entire borders

C.R. rif / ref d (mm) F (mm) D (mm) B (mm) r1 min (mm) S (mm) Cw (KW) Cow (KW) Vel Max Speed (RPM min-1)
NA 4822 110 120 140 30 1 0,8 106 216 3.900
NA 4824 120 130 150 30 1 0,8 112 239 3.150
NA 4826 130 145 165 35 1 1 134 310 3300
NA 4828 140 155 175 35 1 1 136 325 3100
NA 4830 150 165 190 40 1 1,5 172 400 2900
NA 4832 160 175 200 40 1 1,5 181 435 2700
NA 4834 170 185 215 45 1 1,5 209 510 2550
NA 4836 180 195 225 45 1 1,5 219 550 2420
NA 4838 190 210 240 50 2 1,5 255 690 2280
NA 4840 200 220 250 50 2 1,5 260 720 2180
NA 4844 220 240 270 50 2 1,5 275 790 2000
NA 4848 240 265 300 60 2 2 400 1080 1810
NA 4852 260 285 320 60 2 2 415 1160 1690
NA 4856 280 305 350 69 2 2,5 510 1300 1560
NA 4860 300 330 380 80 2 2 700 1770 1440
NA 4864 320 350 400 80 2 2 710 1850 1360
NA 4868 340 370 420 80 2 2 730 1940 1290
NA 4872 360 390 440 80 2 2 740 2020 1230
NA 4876 380 415 480 100 2 2 1130 2900 1140

Cw: Dynamic load  -  Cow: Static load

Technical Characteristics - Needle bearings with entire borders

Massive needle bearings with entire borders obtained on the outer ring form a unique body that cannot be disassembled, as the outer ring, the cages and the needle rollers cannot be disassembled.

These bearings have very small dimensions but a great load capacity. 

The bearings are available with inner ring or without inner ring. 

Needle bearings without inner ring are used in plants whose project foresees a grinded and tempered shaft that acts as rolling raceway.

  • Needle bearings with entire borders have the following characteristics:
  • Outer ring and inner ring are manufactured in core-hardened UNI 100Cr6 steel and reach hardness of 60±2 HRC.
  • The cages are in moulded sheet.
  • Lubrication is made through one groove and hole on the outer ring.
  • The inner ring allows an axial shifting.
  • The bearings can be supplied with RS seals on request.
  • Needle bearings with inner ring are used when the shaft cannot act as rolling raceway.