We buy cores of all makes and models. We even send the pre-paid shipping label. Core returns

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Rebuilt door parts. Shipped same day.

Rows of rebuilt automatic door operator motors on a shop shelf

Rebuilt in Harmon, IL

Rebuilt door parts.
Shipped same day.

Controls, operators, and gearboxes for every major automatic door brand. Our warranty starts the day you install, not the day you buy.

Shop Rebuilt Controls
  • Stanley
  • Horton
  • Besam
  • Nabco
  • Record
  • Dorma
  • Tormax

Select your door: Stanley

Pick the brand on the header, then the door. You only see parts that fit.

In stock now

Featured parts

View all parts

Inside the header

Every part behind the cover

Pick a door, take the header cover off, and open it. Tap a number to see the Addison part that replaces it.

56791227C
Stanley Dura-Glide 3000. Front view, cover removed. Numbers follow the manufacturer's replacement parts book.Stanley 3000 Slider Parts Breakdown
Stanley MC521 Pro Black Label Dual Control Rebuilt

5. Controller

Stanley MC521 Pro Black Label Dual Control Rebuilt

Addison Part#
1237PD
Mfg Part#
185101
View part

Shop by part category

Find it by what it does

Core buy-back

We buy cores of all makes and models

Send us your old controls, operators, and gearboxes. We send the pre-paid shipping label. Right now the Record SYS 20 control is in demand.

  1. 01Fill out the core return form
  2. 02Get a pre-paid shipping label
  3. 03Ship it. We handle the rest.
Start a core returnView cores due
Record 5100 Type 20 slider control

Inside our shop in Harmon, IL

Cores come in. Rebuilt parts go out.

A look inside the Addison shop, where cores are sorted and rebuilt. Photos by the Addison team.

  • Rows of rebuilt operator motors on a shop shelfMotors
  • Racks of automatic door control boardsControl boards
  • Gearbox gears and shafts sorted on a trayGears
  • A pile of bottom guidesGuides
  • Workbench with a tool wall and a motor ready for serviceThe bench

Tech center

The manual is already here

  • 553

    Service manuals and parts books

    Free PDFs by manufacturer, from Stanley and Horton to Tormax and LCN.

    Browse manuals
  • MC521

    Programming guides

    Setup guides for the Stanley MC521 and Black Label Pro controls.

    Open the guide
  • 800

    Tech support from door techs

    Call 800-222-9601. We help diagnose the door and find the exact part.

    Call tech support
Aerial view of the Addison Automatics buildings in Harmon, Illinois

Trade only

Built for door service companies

We sell to service companies that work on automatic doors every day. Open an account to see your pricing, order history, invoices, and cores due.

  • Business FEIN
  • Certified door technicians on staff
  • Commercial door service and repair
Become a CustomerLog in
Warranty starts at installation
Not at the date of sale.
Same-day shipping
On most items. Over 8 ft ships freight.
Every major brand
Rebuilt and new, including legacy lines.