Step #1 – Find Your Backset
Step #2 – Find Your Dead Bolt Throw
Measure your existing Round Bolt lock and determine the “Back Set”. The back set is the measurement of the distance from the edge of your door to the center of the handle. The only backsets available from Hoppe are:
You will need to know the “Deadbolt Throw” distance. This is the measurement of how far the deadbolt extends out of the 3 point mortise lock. Open the door, Activate the lock by lifting upward on the handle. Turn the thumb turn knob and extend the deadbolt. Hoppe only has (2) deadbolt options to choose from.
Once you know the “Backset” and “Deadbolt Throw”, You should be able to find the proper Round Bolt Lock below the deadbolt.
Below are the available options for Hoppe Swing Hook Locks. Please select your lock below and click on the link, you will be taken to the product page of the lock you have selected. There you can read the specifications and purchase your lock replacement. Locks are separated into available backsets first, then by deadbolt throw measurements.
Hoppe Round Bolt lock. This version of lock body, locks at the deadbolt , (1) Roller Pin. & bottom shootbolt.
Hoppe Manual Round Bolt Lock – Locks on the edge & bottom of the lock with a Shootbolt
2 Round Bolt Units – 1 above and 1 below Deadbolt Area.
Round Bolt Lock Points: Lower Round Bolt locking point @ 11 9/16” from Bottom of the door up.
Part Number | Lock Part | Locking Point | Extension Length | Description |
8778611 | Top Extension | Shootbolt 15 3/4″ O.A – Can be trimmed up to 3 15/16″ | 400mm (15.75) | M / 400 / SB1 / 16-SC / 20 / 100 |
8778615 | Top Extension | Shootbolt 18 3/4″ O.A – Can be trimmed up to 3 15/16″ | 475mm (18.70) | M / 475 / SB1 / 16-SC / 20 / 100 |
8778619 | Top Extension | Shootbolt 21 5/8″ O.A – Can be trimmed up to 3 15/16″ | 550mm (21.65) | M / 550 / SB1 / 16-SC / 20 / 100 |
8778623 | Top Extension | Shootbolt 24 5/8″ O.A – Can be trimmed up to 3 15/16″ | 625mm (24.61) | M / 625 / SB1 / 16-SC / 20 / 100 |
8778627 | Top Extension | Shootbolt 27 9/16″ O.A – Can be trimmed up to 3 15/16″ | 700mm (27.56) | M / 700 / SB1 / 16-SC / 20 / 100 |
8778631 | Top Extension | Shootbolt 30 1/16″ O.A – Can be trimmed up to 3 15/16″ | 775mm (30.51) | M / 775 / SB1 / 16-SC / 20 / 100 |
3389488 | Top Extension | Shootbolt 33 7/16″ O.A – Can be trimmed up to 3 15/16″ | 850mm (33.46) | M / 850 / SB1 / 16-SC / 20 / 100 |
3389517 | Top Extension | Shootbolt 36 7/16″ O.A – Can be trimmed up to 3 15/16″ | 925mm (36.42) | M / 925 / SB1 / 16-SC / 20 / 100 |
Part Number | Lock Part | Locking Point | Extension Length | Description |
3537057 | Middle Extension | Roundbolt @ 50 3/4″ From Bottom of the Door to Center of Round Bolt | 466mm ( 18 3/8″ ) | M / 466 / RB1 / 375 / 16-SC / K/ZC |
8778739 | Middle Extension | Roundbolt @ 59 5/8″ From Bottom of the Door to Center of Round Bolt | 691mm ( 27 3/16″ ) | M / 691 / RB1 / 600 / 16-SC / K/ZC |
8778743 | Middle Extension | Roundbolt @ 77 3/8″ From Bottom of the Door to Center of Round Bolt | 1141mm ( 44 15/16″ ) | M / 1141 / RB1 / 1050 / 16-SC / K/ZC |
8778747 | Middle Extension | Roundbolt @ 95 1/16″ From Bottom of the Door to Center of Round Bolt | 1591mm ( 62 5/8″ ) | M / 1591 / RB1 / 1500 / 16-SC / K/ZC |
Part Number | Lock Part | Locking Point | Backset | Description |
8778751 | Gear | Roundbolt @ 11 9/16″ From Bottom of the Door to the Center of the Round Bolt + Bottom Shootbolt | 35mm ( 1 3/8″ ) | M/35/25 / 914 / RB1SB1 / 620 / 16-SC / 20 |
8778755 | Gear | Roundbolt @ 11 9/16″ From Bottom of the Door to the Center of the Round Bolt + Bottom Shootbolt | 45mm ( 1 3/4″ ) | M/45/25 / 914 / RB1SB1 / 620 / 16-SC / 20 |
2485283 | Gear | Roundbolt @ 11 9/16″ From Bottom of the Door to the Center of the Round Bolt + Bottom Shootbolt | 60mm ( 2 3/8″ ) | M/60/25 / 914 / RB1SB1 / 620 / 16-SC / 20 |
2875118 | Cover Plate | N/A | N/A | 37×16 mm |
One of the most common mistakes customers make when buying a replacement Round Bolt Lock with Bottom Shootbolt, is simply by not choosing the correct measurement. If you take a little time and measure the lock correctly, you should be able to find the exact lock that you need. Another mistake that is commonly make is that customers buy a single point lock to repair a broken multipoint lock. This will not work since the 2 lock types are not the same.
A multipoint lock has an internal slide bar that transfers motion onto connected lock extensions while a single point lock does not. A single point lock does not work as a multipoint gearbox replacement. Below are some indications that your lock may have internal parts that are broken.
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Door is stuck or jammed and cannot be opened
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Lever handle is sagging or drooping and not returning to the horizontal rest position after the door has been opened.
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Lock seems to be stripped when opening the door. internal gear teeth are slipping and not disengaging the lock points.
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Lock makes a crunchy noise when opening or locking the door.
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Unable to activate the deadbolt after lifting up on the handle.