A blind spare is a single replaceable component of the mechanism — the clutch, the chain, the brackets, the bottom rail, the ladder tape or the motor. Most blind faults are one of these parts failing rather than the blind itself wearing out, which is why a repair typically costs R150 to R600 plus parts against R450 to R900 per square metre for a replacement roller blind. The clutch is the part that fails most often, because it carries the whole load every time the blind is raised.
Roller Blind Parts and Spares
| Part | What it does | Fails as |
|---|---|---|
| Tube (barrel) | Aluminium roll the fabric winds onto | Sags on wide blinds |
| Clutch | Holds the blind at any height | Slips, creeps down |
| Chain | Drives the clutch | Stretches, snaps, jumps the sprocket |
| Idle end / pin | Supports the far end of the tube | Wears, blind drops one side |
| Brackets | Fix the blind to wall or reveal | Work loose, go out of level |
| Bottom bar | Weights the fabric so it hangs flat | Bends, end caps fall off |
| Chain tensioner | Holds the chain taut for safety | Not fitted at all — the usual fault |
Venetian Blind Parts — Cord Locks and Tilt Mechanisms
| Part | What it does | Fails as |
|---|---|---|
| Headrail | Houses tilt and lift mechanisms | Rarely fails |
| Tilt mechanism | Rotates the slats | Wand spins with no effect |
| Cord ladder (tape) | Carries and spaces the slats | Frays; slats slip or hang loose |
| Lift cord | Raises and lowers | Frays and snaps |
| Cord lock | Holds height | Will not grip; blind drops |
| Slats | The blind itself | Bend, bow, discolour |
Vertical Blind Parts and Louvre Carriers
The carrier is the small trolley in the track holding each louvre, and it is the part that fails most on verticals — louvres drop off one at a time as carriers break. The tilt rod runs the length of the track and rotates every carrier together; when it disconnects, the louvres stop turning. Both are replaceable without a new blind. The bottom chain and weights keep louvres hanging straight and stop them swinging in a draught.
Motorised Blind Parts
Tube motor, battery or transformer, remote handset, and optionally a hub. In practice the order of failure is: battery flat, then handset pairing lost, then motor. Check the first two before assuming the third — see motorised blind systems.
Getting Blind Spares and Replacement Parts Fitted
Components vary by manufacturer, tube diameter and headrail profile, so matching a part usually needs the blind in hand or a photograph of the mechanism. Window Blinds Cape Town repairs blinds we did not supply — see blind repairs, or work through common blind problems to identify the fault first.
Frequently Asked Questions
Can you replace just one slat?
Yes, usually. A bent or damaged slat can be swapped individually provided the width, thickness and colour still match.
Can a roller blind clutch be replaced?
Yes, and it is one of the most common repairs. The fabric, tube and brackets all stay; only the clutch changes.
Do you repair blinds you did not supply?
Yes. Most mechanisms are industry-standard by tube diameter and headrail profile, so parts can usually be matched regardless of the original supplier.
Get a Free Measure & Quote in Cape Town
Window Blinds Cape Town measures, manufactures and installs across the metro. Call 081 411 8471 for a free on-site measure and quote, or browse the other blind guides.