The Hermle 451 series clock movement is a chain driven, three weight, Westminster chime unit.
This clock movement has square outer movement plates that are 120 x 120mm.
What is being offered on this page is the movement only with out the pendulum, gong or dial.
These movement come as the movement itself with its hand nut and new chains, also comes with the suspension spring and leader.
The numbers on the back plate of the movement is everything one needs to get a replacement.
If the numbers match then the movement matches.
If the clock is a pendulum unit, be sure to select the proper CM length that matches the old unit.
Most popular choice are these Serpentine hands for the 451 Hermle Clock Movement for either a 8 inch or 10 inch dial diameter. The dial diameter is also called the time track, it is the ring from outside the 9 to outside the 3 . The minute hand has a 2.8mm square mounting hole that is in a round bushing that rotates with in the hand, the hour hand has a 4.5mm round hole.
#CH3
Not as common on the 451 are these Spade hands. The dial diameter is also called the time track, it is the ring from outside the 9 to outside the 3 . The minute hand has a 2.8mm square mounting hole that is in a round bushing that rotates with in the hand, the hour hand has a 4.5mm round hole.
Item #CH1
Never seen these used on the 451, but there are some crazy clock ideas out there so here they are. Regulator style hands that come in 5 and 7 inch dial diameters (very small for 451). The dial diameter is also called the time track, it is the ring from outside the 9 to outside the 3 . The minute hand has a 2.8mm square mounting hole that is in a round bushing that rotates with in the hand, the hour hand has a 4.5mm round hole.
#CH2
Proper suspension spring for all of the 451 hermle clock movement series. The larger suspension spring is 1 inch long and 7/16 inch wide for the clocks with a 8 1/2 inch or 10 1/2 in bob (round disk at the bottom of the pendulum). The smaller size is for the clocks with a 6 1/2 inch or less pendulum bob. You see if the larger suspension is used with a small bob, it may have trouble running. If the smaller spring is used with the larger bob diameters, the pendulum will wobble and the spring could break also. If ordering a new 451 movement, keep in mind a new movement will come with the suspension already included. It sure is a good idea to have a spare also if you choose to get this and put it on the bottom of the clock case for next time. There will be a next time, there always is when it comes to suspensions, this would make a nice spare instead of searching endlessly in the future for it.
Item #451SUS
The chain fits the 451 series clock movement. It has 46.5 links in a foot and comes in a 6 foot length. The chain comes in either the shiny polished brass style or the darker antiqued brass style. If ordering a new chain driven 451 movement, keep in mind a new movement will come with the chains already included.
Item #WE4
12 Assorted hand nuts for Hermle clock movements. With this assortment of hand nuts you will get one for your Hermle movement with no problem. Please note that if you are buying a new movement, this will come with a hand nut already on it.
Item #CP9 $12
11 x 15 1/2 phase of the moon dial with Arabic gold time track and raised spandrels. The four dial feet on the back of the Moon Dial mount into the movement itself. Has the silent / chime option at 3 O'clock. This dial fits the 451-050 movement.
Item #MD8 $89
11 x 15 1/2 phase of the moon dials with a silver time track and raised spandrels. The four dial feet on the back of the dial mount into the movement itself. Has the silent / chime option at 3 O'clock and has Arabic numerals.
Item #MD1 $125
11 x 15 1/2 phase of the moon dial with Arabic gold time track and raised spandrels. The four dial feet on the back of the Moon Dial mount into the movement itself. Has the silent / chime option at 3 O'clock. This dial fits the 451-053 movement.
Item #MD16 $125.
9 7/8 x 13 phase of the Moon Dials with Arabic gold time track and raised spandrels. The four dial feet on the back of the dial mount into the movement itself. Has the silent / chime option at 3 O'clock. This Moon Dials fits the 451-053 movement.
Item #MD6 $99
Polished brass tone lyre pendulum for the hermle 451 clock movement series. On the back of the clock movement will be the CM stamp. This is not the actual length of the pendulum itself, rather this CM represents the pendulum and leader and suspension all in one measurement where the clock will keep time. All that needs to be done is order the cm length as stamped on the movement, and the pendulum will be the proper length. The bob is the round disk at the bottom of the pendulum and should have about 2 inches on each side to swing around.
#Lyre451
Wood stick pendulum with polished brass bob for the hermle 451 clock movement series. On the back of the clock movement will be the CM stamp. This is not the actual length of the pendulum itself, rather this CM represents the pendulum and leader and suspension all in one measurement where the clock will keep time. All that needs to be done is order the cm length as stamped on the movement, and the pendulum will be the proper length. The bob is the round disk at the bottom of the pendulum and should have about 2 inches on each side to swing around.
#StPend451
Leader for the 451 hermle clock movement. There is the new style, leader D, that goes on the style movement with the post style crutch sticking out of the back of the movement. Then there is the older style for the type of movement that has the double fork like crutch that the leader would go between. The leader gets wacked by the crutch just slightly each tick / tock and this keeps the pendulum going.
#Leader451 - $14
This is the proper chime block for the 451-050 and 451-053 movements. The chime block's longest rod is 22 inches long measured through the top block. It has 8 rods the rods that run straight down, 4 on one side and 4 on the other. The top block is does not have threaded mounting holes, it would be required to bolt the chimeblock in place with bolts and nuts.
#CB451 - $80
The 451 Series movement weight specifications are as follows. The clock needs 2 @ 4.7LBS and 1 @ 6.6LBS IF the pendulum bob is less than 8 1/2 inches wide. The clock needs 1 @ 4.7LBS and 2 @ 6.6LBS if the pendulum bob is 8 1/2 inches or wider. The bob is the round disk at the bottom of the pendulum. The 451 is a three weight movement and each weight's outer shell is 47mm wide x 272mm long (1 7/8 inch x 10 11/16 inch).
#WE451
These are the parts for the polished weight shell for the 451 with out the lead filler. You can get either the complete polished shell or the parts of the shell. The 451 is a three weight movement and each weight's outer shell is 47mm wide x 272mm long. (1 7/8 inch x 10 11/16 inch)
#WE451P
Prior to 1988, the year was two digits (79 was produced in 1979).
Starting in 1988 the year of was indicated by a letter.
