SEBO Toothed Brush Belt 333 3M HTDII-6 for FELIX, DART, ET-1/ET-2 and 370 COMFORT

A toothed belt cannot slip the way a smooth one does, which is why SEBO drives its brush rolls through a geared profile rather than a flat rubber loop. Part 2923 is the 333 3M HTDII-6, the same belt the SOFTCASE CE12 parts list records under the heading toothed belt 333 HTD 3M 6. It sits at position 103 on the ET-1/ET-2, DART and FELIX sheets and at position 125 on the SOFTCASE CE12.

This is the one true consumable in the drive train. Everything else in the head is metal or moulded plastic; the belt is rubber, it is under constant tension, and it wears whether the machine is used hard or gently. A stretched belt announces itself as a brush that free-wheels, ticks under load, or gives up altogether in deep pile while the suction motor sounds entirely normal. One that has begun shedding teeth leaves black crumbs of its own inside the head, and a belt that has been run slack long enough will glaze and start to smell hot. Because the geared profile has to mesh, a tired belt also chews the pulley it runs on, so replacing it early is the cheaper decision.

Full fitment is broad: the SEBO ET-1 and ET-2 power heads in both with-switch and without-switch versions, the FELIX Premium and FELIX 2 Premium, the DART, the 370 COMFORT, the CE12 SOFTCASE, the AIRBELT D4 PREMIUM, the AIRBELT E3 Premium, the AIRBELT K3 PREMIUM and the C3.1. On the 370 COMFORT it pairs with brush pulley 2919ER, and motor pulley 2319 is the driven end on the FELIX Premium, FELIX 2 Premium, DART, 370 COMFORT, AIRBELT D4 PREMIUM, AIRBELT E3 Premium, AIRBELT K3 PREMIUM, C3.1 and both ET heads. Access door 2909VO is the orange flap that has to come off to reach it. Keep a spare on the shelf; this is the part that strands a machine mid-room.

• SEBO part 2923 — belt 333 3M HTDII-6, toothed
• Fits: SEBO ET-1 and ET-2 power heads (with or without switch), FELIX Premium, FELIX 2 Premium, DART, 370 COMFORT, CE12 SOFTCASE, AIRBELT D4 PREMIUM, AIRBELT E3 Premium, AIRBELT K3 PREMIUM and C3.1
• Parts-diagram positions: 103 (ET-1/ET-2, DART, FELIX), 125 (SOFTCASE CE12)
• Type: geared drive belt, so it meshes rather than gripping by friction
• Typical symptom: brush free-wheeling, ticking under load, or stalling in deep pile
• Related part numbers: 2919ER brush pulley, 2319 motor pulley, 2909VO access door
• Genuine SEBO; ships in 2–5 business days