HM88648-610 bearing: complete specifications & equivalents

Specification table

Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB) · extracted 2026-09-28

Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.

Cross references & equivalents

Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.

How the HM88648-610 model number is decoded

The 10 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.08 C0/C balance shows this execution is tuned to thrust-heavy combined loads rather than pure radial running. Fit selection follows the rotating ring — interference on a rotating cone — and two HM88648 units are required to take reversing thrust; keep the induced axial load inside the rated capacity when calculating the pair. Cross-section geometry: the 18.3 mm half-section ((72.233−35.717)/2) of this HM800-series unit places the roller large-end pitch diameter at roughly 53 mm, and the 25.4 mm axial width is split between cone (14 mm) and cup rib (11 mm) — a geometry that sets the contact angle and, with the 490 g rotating cone mass, the critical speed at which cage-roller imbalance begins. From a specification standpoint the 610 cup is the controlling half of HM88648 for housing design — it sets the 72.233 mm OD and the outer abutment diameter — while the HM 88648 cone controls shaft fit at the 35.717 mm bore; the 25.4 mm width is the result of the two together.HM88648 is a single-row tapered roller bearing in the HM88600-series inch series: a separable cone-and-cup design for combined radial and one-direction axial load, listed by SKF in SKF catalogue PUB BU/P1 17000.Digit by digit, HM88648 reads as cone reference / cup reference in the HM88600-series inch series; the 35.717 mm bore, 72.233 mm OD and 25.4 mm width are the metric equivalents of the original inch boundary values. The SKF catalogue adds the ISO 355 dimension-series code after the bare number (e.g. ); it is the dimensional series, not a separate part number.

Typical equipment & failure modes

Selection pitfalls — read before you substitute

• On this 35.717 mm bore, interference and temperature rise consume clearance inside a preloaded pair; calculate the residual clearance after mounting and at operating temperature — an over-tight HM88648 pair heats, loses setting control and smears the roller-rib contact.
• The HM88600-series inch series at 35.717 mm bore (72.233×25.4 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
• O (back-to-back) pairs are stiffer against moments, X (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common HM88648 mounting error.
• When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of HM88648 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
• Never press both rings through the wrong element during fitting: force for an interference shaft seat goes through the cone only, or brinell marks on the 72.233 mm cup race release as noise within the first running hours.
• The 83/90 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
• SKF lists several executions of HM88648 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF HM 88648/610 designation when purchasing and match the execution to the mounting arrangement.