SEBO Sliding Knob for 6237ER Telescopic Tube — AIRBELT D1, E1, E2, K2 and C1.1/C2.1

Length adjustment on the 6237ER telescopic tube depends on one small part, and 6425ER is it. Push the knob with your thumb and it lifts the internal catch so the inner tube can travel; release it and the catch drops into the nearest detent.

SEBO draws that length lock as three orderable pieces rather than one, which is worth knowing before anything is ordered. The knob is position 42 on the AIRBELT D diagram and position 51 on the AIRBELT K diagram. Directly after it, at position 52, sits the locking mechanism 6238ER — the catch the knob actually acts on. The tube itself is 6237ER, drawn at position 50 on the K sheet and 39 on the D sheet, and the fitting neck at the coupling end is 1736GS. That split matters when a tube still slips after a new knob goes on: at that point the lock, not the knob, is the worn component.

A knob normally fails by cracking around its boss or shearing off outright, and the tube then either jams at one length or runs free with nothing to hold it. Neither state survives a repair with tape, and neither justifies buying a complete tube.

• Part number: 6425ER
• Fitment: SEBO AIRBELT D1 TURBO, AIRBELT E1 KOMBI, AIRBELT E2 TURBO, AIRBELT K2 KOMBI, AIRBELT K2 TURBO, and C1.1 and C2.1
• Used on: telescopic tube 6237ER
• Diagram positions: 42 on the AIRBELT D sheet, 51 on the AIRBELT K sheet
• Related numbers: 6238ER locking mechanism, 6480ER release button with leaf spring, 1736GS fitting neck, 6300GS handle grip
• Replace when: the knob is cracked, missing, or no longer frees the catch

SEBO's own caption for position 50 describes 6237ER as the stainless steel telescopic tube, complete, which is a useful cross-check when the only reference to hand is a printed sheet. Anyone searching for a SEBO tube sliding knob, a 6237ER telescopic tube lock or a canister wand adjustment knob has arrived at the right number. Genuine SEBO sliding knob, shipping in 2–5 business days.