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6940 Interlocks & More
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, UNITEC offers different replacement or refurbishment options.
- Complete 6940 Interlocks with or without a spirator are available at low prices.
- Spare parts are also available to fix as you go.
- 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.
- UNITEC also offers unlocking devices which can be added to any 6940 system.
Complete 6940 Interlock sets with or without reel closers are available, as are replacement assemblies. Adaptor plates are also available (separately) to help adapt newer version 6940 Interlocks to the earlier vintage lock bolt pattern.
Part Identifier Guide (search part to purchase from our Website:
Left hand to right hand
E6940AP1 - Right hand center opening with spirator closer
E6940AP2 - Right hand with spirator closer
E6940AP3 - Left hand with spirator closer
E6940AP4 - Left hand center opening with spirator closer
E6940AP5 - Right hand center opening with short roller - for tight running clearances
E6940AP6 - Right hand with short roller - for tight running clearances
E6940AP7 - Left hand with short roller - for tight running clearances
E6940AP8 - Left hand center opening interlock with short roller - for tight running clearances
B6940BG1 - Right hand without spirator closer
B6940BG2 - Left hand without spirator closer
B6940BG3 - Right hand without spirator closer with short roller - for tight running clearances
B6940BG4 - Left hand without spirator closer - with short roller - for tight running clearances
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
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.
When installing 6940 Interlocks on floors where they were not present previously, you may be required to add an additional unlocking device. We have kits for both standard 7-foot entrances as well as high 8-foot openings.
UNITEC is beginning to introduce a database of "related items" for some of our parts. The first item is the 306FM1 shorting bar for the 6940 Interlock latch. Here you may find other items that you need, related to this.
Our Interlock catalog has a picture index at the beginning of it, which can be very helpful in identifying the type of Interlock on the job. You can find many of these items in our Parts Warehouse.
OVL and NG locks
You can rebuild your OVL and NG locks with one of our rebuild kits or some of our spare parts.
Contact your UNITEC Representative today:
For OVL locks please provide the door hand, door type, cab height and entrance height.
For NG locks please provide the door hand and running clearance (sill to threshold), which should be =32mm or <32mm