Bearing range
Single-row ball bearings that carry axial load in both directions, in the QJ series.
A four-point contact ball bearing has a single row of balls, an outer ring raceway and an inner ring made in two halves. The ball touches the rings at four points when loaded, so the bearing carries axial load in both directions, with some radial load, in a space where a pair of angular contact bearings would be needed. They are usually fitted next to a radial bearing, and the outer ring is often left with a little clearance in the housing so that only the four-point bearing takes the axial load.
QJ series four-point contact ball bearings with a split inner ring, for gearboxes, pumps and compressors. SKF.
Sizes and load ratings are from SKF’s catalogue: d is the bore, D the outside diameter and B the width, all in mm; C is the dynamic load rating in kN. We supply SKF and FAG; ask for other brands. Prices change, so tap “Price” to ask us on WhatsApp.
No match in this list. We can still source it: send us the number or size.
| Bearing | d | D | B | C | Price |
|---|---|---|---|---|---|
| QJ 203 N2MA/C2L | 17 | 40 | 12 | 17 | |
| QJ 206 MA | 30 | 62 | 16 | 37.5 | |
| QJ 207 N2MA/C2L | 35 | 72 | 17 | 49 | |
| QJ 208 | 40 | 80 | 18 | 55.3 | |
| QJ 209 MA | 45 | 85 | 19 | 63 | |
| QJ 210 MA | 50 | 90 | 20 | 65.5 | |
| QJ 211 MA | 55 | 100 | 21 | 85 | |
| QJ 212 | 60 | 110 | 22 | 95.6 | |
| QJ 213 MA | 65 | 120 | 23 | 110 | |
| QJ 214 N2MA | 70 | 125 | 24 | 120 | |
| QJ 215 MA | 75 | 130 | 25 | 125 | |
| QJ 216 MA | 80 | 140 | 26 | 146 | |
| QJ 217 MA | 85 | 150 | 28 | 156 | |
| QJ 218 N2MA | 90 | 160 | 30 | 186 | |
| QJ 219 N2MA | 95 | 170 | 32 | 212 | |
| QJ 220 N2MA | 100 | 180 | 34 | 236 | |
| QJ 222 N2MA | 110 | 200 | 38 | 280 | |
| QJ 224 N2MA | 120 | 215 | 40 | 300 | |
| QJ 226 N2MA | 130 | 230 | 40 | 310 |
| Bearing | d | D | B | C | Price |
|---|---|---|---|---|---|
| QJ 304 MA | 20 | 52 | 15 | 32 | |
| QJ 306 MA | 30 | 72 | 19 | 53 | |
| QJ 307 MA | 35 | 80 | 21 | 64 | |
| QJ 308 MA | 40 | 90 | 23 | 78 | |
| QJ 309 MA | 45 | 100 | 25 | 100 | |
| QJ 310 MA | 50 | 110 | 27 | 118 | |
| QJ 311 MA | 55 | 120 | 29 | 137 | |
| QJ 312 MA | 60 | 130 | 31 | 156 | |
| QJ 313 MA | 65 | 140 | 33 | 176 | |
| QJ 314 MA | 70 | 150 | 35 | 200 | |
| QJ 315 N2MA | 75 | 160 | 37 | 216 | |
| QJ 316 N2MA | 80 | 170 | 39 | 232 | |
| QJ 317 N2MA | 85 | 180 | 41 | 250 | |
| QJ 318 N2MA | 90 | 190 | 43 | 285 | |
| QJ 319 N2MA | 95 | 200 | 45 | 305 | |
| QJ 320 N2MA | 100 | 215 | 47 | 345 | |
| QJ 336 N2MA | 180 | 380 | 75 | 680 |
QJ is a single-row four-point contact ball bearing. The digits that follow work like other bearings: the first digits give the series, and the last two multiplied by 5 give the bore in mm, so a QJ 208 has a 40 mm bore.
N2 means two locating slots in the outer ring, which stop it turning in the housing, and M means a machined brass cage. Other letters differ between makers, so check the whole number on the old bearing before ordering.
Because the ball touches at four points, one bearing carries axial load in both directions. It is usually fitted next to a radial bearing that carries the radial load.
Brands
Genuine stock from SKF, FAG, NTN, NSK, KOYO, INA and HCH, and other manufacturers on request.
Questions
QJ is the designation for a single-row four-point contact ball bearing. The digits after it give the series and bore in the same way as for other bearings: the last two digits times 5 give the bore in mm.
In some designs, yes, because it takes axial load in both directions. It depends on the load and speed, so send us the application and the old bearing and we will advise.
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Read article: Why bearings fail: the seven most common causes and how to prevent themSend it to us. We will tell you what it is, what it costs, and how soon it can be at your door.
