Somfy LT50 2.5" Round Crown and Drive Set (9012231)

Somfy LT50 2.5" Round Crown and Drive Set, part 9012231, features: crown and drive wheel set for 2.5" round tube, concentric motor, slip-free torque, LT50 / 500 Series motors

Somfy LT50 2.5" round crown and drive set 9012231 uses: roller shades on 2.5" round tube with LT50 / 500 Series motors

Parts that work with the Somfy LT50 2.5" round crown and drive set 9012231: Sonesse 50 510S2 star head 1001813, 525A2 Altus RTS 1043423, Simu DMI5 50 Nm 2000776, LT50 star head bracket 9410651

Somfy LT50 2.5" round crown and drive set 9012231 compared: LT50 60mm octagonal set 9012233, LT50 70mm octagonal set 9012234

Buy the Somfy LT50 2.5" Round Crown and Drive Set, part 9012231, genuine new, from ShadeMotorsDirect

Somfy LT50 2.5" Round Crown and Drive Set (9012231)

SKU: 9012231

$9.50

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5-Year Warranty Somfy warranty on every part

30-Day Returns 35% restocking fee

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Ships in 1-2 business days. US shipping $15 flat.

Returns: 30 days from delivery, unused and in original packaging, with an RMA. A 35% restocking fee applies and the customer pays return shipping, unless the item is defective or we made an error. Custom and engraved items can be returned only if defective. Full return policy

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LT50 2.5" Round Crown & Drive Set -- complete crown & drive set for 2.5" round tube

This genuine Somfy crown and drive set is the complete motor-to-tube connection for 2.5" round tube: the crown centers and supports the motor while the drive wheel locks into the tube profile for slip-free torque transfer.

Benefits

Complete matched set for 2.5" round tube
Crown keeps the motor concentric; drive transfers torque without slip
Quiet, true rotation across the shade's full travel
Simple slide-on assembly for fabricators and retrofits

Specifications

Tube	2.5" round
Contents	Crown + drive wheel

Compatible with: Somfy 50mm-class (500 Series / LT50) motors including LT50, LT50 CMO, Altus RTS, Sonesse 50, and DMI5 ranges

Official Somfy documentation

Sold by ShadeMotorsDirect -- an authorized source for genuine Somfy motorized window shade, blind, and drapery parts.

Common questions

What is in the LT50 2.5 in Round Crown and Drive Set?

Part 9012231 contains a crown and a drive wheel for 2.5 in round tube. The crown centers and supports the motor, and the drive wheel locks into the tube profile to pass the motor's torque to the roller.

Which motors does it fit?

It fits Somfy 50mm-class (500 Series, LT50) motors, including the LT50, LT50 CMO, Altus RTS, Sonesse 50 and DMI5 ranges. Examples in our store include the Sonesse 506S2 RTS (1001809) and the Altus RTS 550R2 (1038170).

What else do I need to mount the motor?

Add a motor bracket for the head end, such as the LT50 Universal Bracket with Spring Clip (9420631) or the LT50 Star Head Motor Bracket (9410651). For the tube, the Somfy 2.5 in OD Aluminum Tube (1781343) is sold by the foot.

What if my tube is a different size or profile?

Choose the set that matches the tube. Somfy also offers the Octagonal LT50 60MM Crown/Drive Set (9012233), the Octagonal LT50 70mm set (9012234) and the LT50 DS78MM set (9012239). For SM65 tube, pair the SM65 Crown (9707030) with the SM65 Drive (9751002).

Shade Motors Direct Spec Library Product specs, manuals and technical documents

Replace a worn crown or drive, or order the right set for a new roller.

Match the set to your motor head and your tube size.

LT50 2.5" Round Crown and Drive Set, part 9012231.

Replacing one

1
Take the shade down
Cut power and lift the roller out of its brackets.
2
Pull the motor
Slide the motor out of the tube.
3
Swap the part
Pull off the worn crown or drive and fit the LT50 2.5" Round Crown and Drive Set.
4
Slide it back
Insert the motor drive end first and rehang the shade.

Not sure of your tube? Send us a photo of the tube end and your motor label. We'll confirm before you order. Ask us

Starting new

1
Check your tube
Measure across the outside of the tube end and note the shape: round, octagonal or a brand profile.
2
Fit the crown
Slide the crown onto the motor until it seats against the head.
3
Fit the drive
Push the drive onto the output shaft until it locks.
4
Slide the motor in
Insert the motor into the tube, drive end first.

Planning a new install? Send us the window size and a photo. We'll build the parts list with you. Ask us

Motors the LT50 2.5" Round Crown and Drive Set works with

Somfy lists these motors as compatible with part 9012231.

Sonesse 50 510S2 RH Standard 120V 4-Wire Motor Part 1001810 $345.00

$345.00

Sonesse 50 510S2 RS485 SDN 120V Motor Part 1002287 $564.34

$564.34

Sonesse 50 510S2 RTS RH 120V 3-Wire Motor Part 1001805 $455.00

$455.00

Sonesse 50 510S2 Standard 120V 4-Wire Motor Part 1001813 $330.00

$330.00

Sonesse 50 515S2 RS485 SDN 120V Motor Part 1002427 $534.60

$534.60

Sonesse 50 535A2 RS485 SDN 120V Motor Part 1002288 $568.00

$568.00

More Somfy motors work with it too. Ask us if yours isn't listed.

Somfy backs the LT50 2.5" Round Crown and Drive Set for 5 years. We handle the claim.

5years

Somfy warranty on the LT50 2.5" Round Crown and Drive Set, part 9012231.

What Somfy covers: Defects in materials and workmanship, for 5 years from purchase.
If it fails: Email us your order number. We arrange the replacement with Somfy.
Where it comes from: ShadeMotorsDirect is an authorized Somfy distributor. You get the US version, new in Somfy packaging.
Returns: Unopened items in original packaging. Ask us for an RA number before you ship.
Questions: Call or chat, 8:00 AM - 7:30 PM ET.
Somfy documents: LT50 / 500 Series Databook (PDF)

Guides for this product

Somfy Sonesse 506S2 RTS 120V roller shade motor with built-in RTS receiver, Sonesse 50 range

Mentions this part

Somfy LT50 2.5" Round Crown and Drive Set (9012231)