6940

The 6940 Type Interlock is one of the most recognized in the industry. The interlock prevents the opening of the hoistway doors unless the car is within the landing zone and is either stopped or being stopped. Because the 6940 Type is still so common, we offer different replacement and refurbishment options.

Complete 6940 Interlocks with or without a spirator are available at low prices.
Save money on labor by purchasing one of our 6940 labor-saver kits.
Rebuild kits (both full service and minimum rebuilds) are also available to provide the essential items required to refurbish existing locks.
We offer unlocking devices which can be added to any 6940 system.
Spare parts are also available to fix as you go.

**6940 Interlock Rebuild Kits**
Making the Old - Like New! Rebuild kits are available for Otis 6940 Interlocks of all vintages from 1962 to present. There are full service kits as well as the basic, most economical option.
Application	Rebuild Type	Part Number
Later (common) short switch box with black contact block only. Includes contacts but not contact block. Does not apply to red contact block switches.	Minimum	B6940C500
Later (common) short switch box with black contact block only. Includes new contact block assembly. Does not apply to red contact block switches.	Minimum	B6940C501
Early tall switch box w/square corners and black contact block. Does not apply to red contact block switches.	Maximum	B6940C502
Later (common) short switch box with black contact block. Does not apply to red contact block switches.	Maximum	B6940C503
Later Short production run switch box with red contact block. Does not apply to black contact block switches.	Maximum	B6940C504
Use for low profile roller applications only. (.91” TOTAL roller width including step down) Comes with later black contact block assembly.	Minimum	B6940C505

**Complete 6940 Interlock sets**
with and without reel closers
Hand	Spirator	Roller	Part Number
Right hand center opening	with spirator closer	Standard	E6940AP1
Right hand	with spirator closer	Standard	E6940AP2
Left hand	with spirator closer	Standard	E6940AP3
Left hand center opening	with spirator closer	Standard	E6940AP4
Right hand center opening	with spirator closer	Short roller for tight running clearances	E6940AP5
Right hand	with spirator closer	Short roller for tight running clearances	E6940AP6
Left hand	with spirator closer	Short roller for tight running clearances	E6940AP7
Left hand center opening	with spirator closer	Short roller for tight running clearances	E6940AP8
Right hand	without spirator closer	Standard	B6940BG1
Left hand	without spirator closer	Standard	B6940BG2
Right hand	without spirator closer	Short roller for tight running clearances	B6940BG3
Left hand	without spirator closer	Short roller for tight running clearances	B6940BG4

**Adaptor plates are also available (separately) to help adapt newer version 6940 Interlocks to the earlier vintage lock bolt pattern.

AAA6940CC400 - UNITEC 84-96” Unlocking kit
AAA6940BZ3 - Right hand car door vane for 6940AP/BG locks - latest ANSI code shortened unlocking zone version
AAA6940BZ4 Left hand car door vane for 6940AP/BG locks - latest ANSI code shortened unlocking zone version
AAA306RE1 - 6940 Hall door lock studded mounting adapter plate
B6940AN1 Spirator closer with bracket - (Just flip reel around with retaining ring removal) Left hand