Mechanical clock chime rods for post 1950 mechanical clocks. Offering the chime block complete with the rods. Clockworks
Chimeblock and RodsWhy the entire chimeblockOrdering the chime blockChime Hammer Adjustment
Please view these information tabs to learn about our Mechanical Clock Chimeblock and Rods
Why we offer only the complete chime-block
We now only offer the complete clock chime-block and rods. The rods are a press fit into the chime-block by machines and it is difficult to get a single rod out. Other times there are threads that go into the block but have such a secure tight fit, you cannot remove them.
Trying to do so would result in more rods breaking. Also there are various threads on the rods that are the replacements and it can create much confusion. It is for these reasons that we now offer the complete clock chime-block and rods.
Overall, it is a tricky thing to get the correct thread size for the individual rod in a chime-block and rod set and have it fit perfect. Not to mention, when the chime-block rod is not the correct size, often enough it gets sent back. Then we get into the situation of trying to swap it out over and over.
Moreover, all of it eventually ends up being a return for a complete chime-block and rods set. So, in the long run it is best to just get a new chime block and rod set from the beginning. That will save a lot of time and frustration.
Chime-block and rods volume
The volume of the clock chime is not alterable by means of the chime-block and rods or the hammer adjustment.
These parts have nothing to do with making the clock louder or softer. The only thing that can make the clock louder or quieter is to move the clock case.
If the clock is on a hard wood surface it will be louder. A rug will be quieter. The proximity to the wall can also alter the sound. It has nothing to do with the chime-block and rods.
Chime block style B For side strike units. Occasionally, you can also use this for back strike diagonal Westminster units.
Back Strike Style C
Chime block style C is for floor clock models (and some wall clocks) with two rows of hammers on the back of the clock movement.
Chime sound in Clock Chime Block Styles
No matter which Clock Chime Block Style you need, there has to be some adjustments made. If the clock chime does not have a clear, crisp tone, do not panic. It could just be a matter of adjusting the hammers on the rods.
The hammer heads are on wires which are meant to be bent. Do this with your fingers, while the hammer head is down.
Just bend the wire that the hammer head is on, one at a time. Keep the hammer head about 1/8” from the rod when it’s at rest. In other words, in the up position. Bend one at a time.
Then, lift and drop it to see if there is a nice crisp tone. Subsequently, do this right down the line with each hammer on whatever chime block style. Make sure each one has a nice tone. In the long run, the chime will sound perfect.
They are meant to be bent into the perfect position. It is not uncommon to bend them an inch this way or that way. The clock movement will not have the hammers in the perfect spot to make the correct sound when hitting the rods. This is why chime hammer positioning is so important.
The hammers need to be 1/8 inch away from the rod when at rest. In other words, bend the hammer wires so the head is 1/8 away from the chime rod. This spacing between the head and the rod is so it will not thud or double strike.
Tuning the mechanical clock chime
Down the line, and one hammer at a time, repeat this process. Continue in this manner until you can lift and drop the hammer to create a crisp sound. If each hammer head is done this way the clock will have a nice song in the end.
Often a customer will say the sound is not correct. It is because of improper hammer positioning that this occurs. When performing the above directions correctly the sound is beautiful.
Positioning the 340 / 341 series
The 340 and 341 Hermle clock movement series went through a change in the hammer wires. The hammer heads were on wires but now they are made on flat bars. This is dealt with in the same way as above, it is just not as easy to bend.
The hammer head is on the skinny end of the bar, the bar gets wider as it goes back toward the roll pin.
The point to bend this bar is at the place where it goes from skinny to wide with needle nose pliers. The overall assembly will be higher from the chime block slightly. That is if swapping out the movement with the wire hammer head rod older style.
It is an option to raise the entire chimeblock with a shim underneath it to help with this. It is not an absolute requirement, bending the hammer arms are usually sufficient.
Mount this Grandfather Clock Chime Block Back-Strike to the back of the clock case. The rods are already in into the block and at the perfect pitch. To get the correct block count the rods that are in the block. Measure the length of the longest rod through its mounting block and order that size.
This is a Clock Chime Block for a Bottom Strike mechanical clock movement. The length is the longest rod within the block from end to end. This mounts to the bottom of the clock case so the hammers can chime the song.
This is a Clock Chime-Block for a Side Strike mechanical clock movement. Available in 5 rod for Westminster units or 8 rods for Triple Chime clock movements. The length is the longest rod within the block from end to end.
A 5 rod chime block for Westminster mechanical clocks. The longest rod measures 7 inches from one end to the other through the block. Use this for a side hammer Westminster unit or a bottom hammer unit.
Side-Strike BimBam 3-rod Chime-Block is for a 3 hammer clock and is 19 1/2 inches long tip to tip. Comes with two mounting bolts with washers and is intended to mount to the side area of the clock case.
This is a Chime-Block for a Side Chime Westminster mechanical clock movement. The length of the chime rod is measured overall and through the block itself. This measurement is 13 3/4 inches for that longest rod all the way through.
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