61700 Series Deep Groove Ball Bearings

The thinnest section in this library: 2.5 mm of radial section on a 10 mm bore, against 4.5 mm for the ultra-thin 61800 of the same bore. It is ISO 15 diameter series 7 — the rung below the 61800, and the last one that standard tabulates. Catalogue tables often stop around 61710, which is why the series is commonly described as a short one; ISO 15 carries it across the whole 10–100 mm bore range, and that is what is tabulated here.

The 61700 series is the thinnest section tabulated here, one rung below the ultra-thin 61800. It is ISO 15 diameter series 7, the last of the diameter series the standard lays out. The step is small in absolute terms and large in proportion: on a 10 mm bore a 61700 is 15 mm across and 3 mm wide, against 19 × 5 for a 61800 and 26 × 8 for a 6000 — 2.5 mm of ring section in total, where the 6000 has 8 mm.

Catalogue tables for this series often stop around 61710, which is why it gets described as a short series. That is a fact about the catalogues and not about the standard: ISO 15 carries diameter series 7 across the same bore range as the diameter series beside it, and all 21 designations from 61700 to 61720 are tabulated here. What a short catalogue list does mean is that the larger sizes are the harder ones to actually buy — check supply before designing one in.

The trade-off is the steepest in this sub-library. A 61700 has the least ring section of anything here, so it carries the least load and is the most sensitive to shaft and housing accuracy. It is chosen by instruments, encoders and miniature mechanisms, and it is almost never chosen to carry a load: it is chosen because the wall is thin and nothing else fits.

Every designation in the table below links to its own page with the ISO 15 dimensions, the bore-code arithmetic, the ISO 5753-1 clearance ranges for its bore, and the same-bore comparison against every other series.

This series runs from a 10 mm to a 100 mm bore. The sub-library as a whole reaches 300 mm of bore, and the widest single bearing in it is a 6360, 620 mm across, in the 6300 series. This one stops short of it.

d = bore diameter, D = outside diameter, B = width. All of them are ISO 15 standard values and are the same for every manufacturer. r s min is the minimum single chamfer dimension the plan gives; its matching maximum is in ISO 582, which is why the column says “min” and not an equality. The last column is derived: radial section = (D − d) / 2, the wall thickness you are working with when you size the housing. No load rating and no limiting speed appears here — see the bearings index for why.

Outside diameter × overall size in millimetres, for the 5 smallest bores in this database. The full charts, one per type, are on the bearings index. Reading a row is what a machine designer does when the shaft is already fixed: the bore does not change, the housing bore does. Across the type boundary the last number changes meaning — it is a width above and a height below — so compare within a type, then decide whether the job wants a ball bearing, a tapered roller or a thrust bearing at all. The 6 series whose type has no bore are not rows here: they are indexed by the shaft they run on, and their chart is above.