What the three pivot types do
A bottom pivot is a steel pin running vertically through the corner of the door into a brass bushing in the frame. It is the load-bearing component on aluminium-framed half-glazed doors with a transom closer above. The pin takes the full weight of the door; the bushing carries the rotational load.
A top centre is a smaller version of the bottom pivot, fitted at the top of the door. On a transom-closer door, the top centre handles only the rotational load — the closer arm pulls the door home but the top centre keeps the door square in the frame. On a centre-pivot door (less common in the UK), the top centre takes vertical load too.
A bottom shoe is a stamped-metal bracket bolted to the bottom corner of the door, riding on a top centre or a floor-mounted pivot block. Bottom shoes are the standard arrangement on heavier all-glass retail entrance doors.
How pivots fail
Bottom pivots fail by abrasive wear on the pin. The pin starts life cylindrical and slowly machines itself into a slight oval as it rotates against the bushing. Once the oval is a few tenths of a millimetre out of round, the door starts to drop and to rattle in the frame. Catching it here is a 90-minute replacement.
Top centres fail by wear in the plastic insert. Most modern top centres run on a replaceable nylon or acetal bush. The bush wears, the door starts to drift away from the frame at the top, and the customer sees daylight through the new gap. The insert is replaceable on its own on most brands — a 30-minute job — or the whole top centre can be swapped if the bracket itself has flexed.
Bottom shoes fail by fracture of the steel bracket, almost always at the bolt holes where the load is concentrated. On a busy retail door this happens after 5–10 years on average. A fractured shoe is more urgent than a worn pivot — the door is no longer reliably attached to the frame.
Diagnosis on site
The engineer's first check is door square. With the door closed, the gap between the door and the frame should be uniform top to bottom and left to right (allowing for the standard threshold gap). On a dropped door the bottom gap is narrow and the top gap is wide. On a door with a worn top centre, the gap is wider on the latch side at the top than on the hinge side. On a fractured shoe, the door is loose in all directions and can be moved by hand in ways a healthy door cannot.
The second check is the closer. A worn pivot puts a closer under stress; many of our pivot replacements come paired with a closer adjustment because the closer has been compensating for the pivot wear and now needs re-tuning.
Replacement routes
Bottom pivot replacement is a one-to-two hour job. The door is supported on a wedge. The transom-closer arm is disconnected. The pivot pin is unbolted from the corner of the door and the bushing is pressed out of the frame. The new pivot goes in, the door is reset onto the pin, the closer arm is reconnected and adjusted, and the latch is checked against the strike.
Top centre replacement is faster — typically under an hour, often half that on doors with accessible top centres. Insert-only replacement (where only the plastic bushing is changed) is faster again.
Bottom shoe replacement is more involved because the bolt holes in the door corner are usually elongated by the failing shoe. The engineer often needs to drill out and re-tap the holes for the new bracket, or move the new bracket to fresh holes. Half a day is a typical budget for this on a heavier all-glass door.
For the full silo see transom and bottom pivot repair.
Cost guidance
A standard bottom pivot replacement on an aluminium shopfront door comes in at £200–£400 fitted, including the part. Top centres are similar — £150–£350. Bottom shoe replacement on a heavier glass door is £300–£700 because the bracket itself is more expensive and the prep work is longer.
Brand-specific parts can move these numbers up — high-end Dorma, Geze and Vachette pivot blocks are noticeably pricier than universal-fit equivalents. Where the existing brand is unbranded or generic, we fit a stock universal pivot that will outlast the rest of the door hardware.
When pivot failure is a symptom of something bigger
Two patterns suggest the pivot wear is downstream of another problem. First, a repeat pivot failure — if a door has had two pivots replaced in three years, the closer is almost certainly over-pressuring and the pivot is taking the brunt. A closer adjustment fixes the underlying cause.
Second, a pivot failure paired with crack damage to the door corner or the frame. This points to vehicle impact or vandalism rather than wear. The engineer documents the damage for an insurance claim where relevant — see our guide on insurance claims for door damage.