SEW-EURODRIVE K87DRN90L4BE5HRALDH Helical Gearbox

SEW-EURODRIVE's K87DRN90L4BE5HRALDH is a K-series right‑angle helical‑bevel gearmotor (DRN family) that pairs a compact, robust 87‑size gear unit with a motor in a single package to deliver a 174.19:1 reduction ratio and a 2 HP input rating. The DRN designation identifies a helical‑bevel gear set housed in a durable monobloc casing, and the 90L4 indicates the output‑shaft variant configured for straightforward mounting. The gear housing is high‑strength cast iron (SAE Class 30 / GG20) with gears finished ground or shaved to minimize noise and maximize efficiency, while anti‑friction bearings support long life. An exclusive two‑piece seal design—bi‑helix FKM inner seal plus a nitrile outer seal—paired with an O‑ring on the flange helps prevent oil leakage and contamination, and the center‑tapped output shaft facilitates mounting of shaft components. A removable inspection cover provides maintenance access. The DRN family is designed for inverter‑duty operation and supports 50 Hz and 60 Hz motors, with IE3 Premium options available. Mounting versatility includes B14 or B5 flanges with centering tenon, C‑face or IEC motor adapters, and optional torque arms for secure installation. This model thus offers a compact, high‑torque solution for demanding drives where space constraints matter and reliable, shielded operation is essential.