SKF HN21-22 bearing mounting / dismounting tool. Precision fitting tool — impact ring set (TMFT), induction heater (TIH), oil-injection dismounting kit (TMOF), hydraulic pull-up nut (HMV), or three-arm mechanical puller (TMMR / TMMD) — used to mount and dismount rolling bearings without damage.
| Type | Bearing mounting / dismounting tool |
| Designation | SKF HN21-22 |
| HS code | 8205.59 |
| Nose width (Nₖ) | 12 mm |
| Nose height (Nₕ) | 5 mm |
| Thickness (n) | 12 mm |
| Length (L) | 386 mm |
| Working length (l) | 320 mm |
| Height (H) | 98 mm |
| Recommended applications | For applications that require tightening/loosening a wide variety of lock nuts on shafts, adapter sleeves, and withdrawal sleeves. |
| Series | Hook spanner, standard, HN |
| Allows bearing mounting | No |
| Size according DIN 1810 | 135 to 145 mm |
| Fits on lock nuts inside SKF split pillow block housings (SNL) | No |
| Suitable SKF Locknut | KM 21, KM 22, KMFE 21, KMFE 22, KMT 20, KMT 22, N 022, AN 21, AN 22 |
| Material | Medium carbon steel, hardened and tempered |
| Material handle | Durable soft plastic |
| Coating | Black phosphated |
| Colour | Black, with red handle |
| Part of a kit | No |
| Country of Manufacturing (COM code) | 35 - Slovenia |
| Product net weight | 1.21 kg |
| eClass code | 23-05-19-01 |
| UNSPSC code | 27111712 |
| Material | As declared by SKF designation suffix |
| Temperature range | Per SKF product data |
| Primary standard | SKF designation convention |
| MOQ | 1 |
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.