> ## Knowledge Base Index > Fetch the complete knowledge base index at: https://clockworks.crisp.help/sitemap.xml > Use this file to discover available pages before exploring further. > Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash). # Grandfather Clock Weights Description ### Grandfather Clock Weights Description The Grandfather [Clock Weights](https://www.clockworks.com/clock-parts/mechanical-grandfather-clock-weights.html) Description on this web page will cover what is meant by weights and their parts. Any part of the weight is available on its own. We also offer complete weights. If needing a complete clock weight, we need to determine what the appropriate weight is for the clock. [![](https://storage.crisp.chat/users/helpdesk/website/-/9/5/9/1/9591a3f915bf7800/weight_17y6wsi.jpg =340xauto)](https://www.clockworks.com/clock-parts/mechanical-grandfather-clock-weights.html) ### Click on the picture to shop Clock Weights This requires getting the information off of the back plate of the [brass movement](https://www.clockworks.com/clock-movement.html) itself. This information will not be on any of the paperwork or clock case. Once the movement number is known, cross reference that with the weight chart. The diameter of the bob in another piece of information that needs to be known. The [bob](https://www.clockworks.com/product/mechanical-clock-pendulum-bob) is the round disk at the bottom of the [pendulum](https://www.clockworks.com/product-category/all-clock-parts/german-mechanical-clock-pendulums). [![](https://storage.crisp.chat/users/helpdesk/website/-/9/5/9/1/9591a3f915bf7800/pendulums_1pl35j5.jpg =816xauto)](https://www.clockworks.com/product-category/all-clock-parts/german-mechanical-clock-pendulums) ### Click on the picture to shop Clock Pendulums on Clockworks.com ### The weight chart Before using the chart, you need to know [who made the clock movement](https://www.clockworks.com/clock-movement.html). This can be deceiving because the movement can have any name on it, but it may not be the true maker. For example, a [Hermle](https://hermleclock.com/) unit may have the name Sligh, Ridgeway, [Howard Miller](http://www.howardmiller.com/) and so on. The numbers on the movement is what will lead to getting the correct manufacturer of the movement not the names on the movement. The stamp with these numbers are right on the back plate. Use the [movement identification page](https://www.clockworks.com/clock-movement.html) to find out who made it. Once the manufacturer is known and the starting numbers of the movement, use the chart to see the [weight specifications](https://www.clockworks.com/clock-parts/mechanical-grandfather-clock-weights.html) for the Grandfather clock weights. ### Avoiding the weight chart There is also another way to go about this task, which may be easier. If the movement was made in Germany, post WW2, we can safely make the following assumptions. If the movement is square and [chain](https://www.clockworks.com/product/grandfather-grandmother-clock-chain) driven, it will require 2@4.7 lbs and 1@6.6 lbs. These are available in either 47mm or 43mm diameters. If the pendulum bob is 8 1/2 inches or more, change that rule to 2@6.6 lbs and 1@4.7 in 47mm or 43mm. A movement that is rectangle in either [chain](https://www.clockworks.com/product/grandfather-grandmother-clock-chain) or [cable](https://www.clockworks.com/product/genuine-replacement-cable-for-grandfather-clocks) will use 2@7.7 and 1@9.9 LBS in 60mm diameter. [![](https://storage.crisp.chat/users/helpdesk/website/-/9/5/9/1/9591a3f915bf7800/chain_1ph0c2j.jpg =251xauto)](https://www.clockworks.com/product/grandfather-grandmother-clock-chain) ### Click on the picture to shop Clock Chains on Clockworks.com [![](https://storage.crisp.chat/users/helpdesk/website/-/9/5/9/1/9591a3f915bf7800/cable_1p25xyt.jpg =292xauto)](https://www.clockworks.com/product/genuine-replacement-cable-for-grandfather-clocks) ### Click on the picture to shop Clock Cable on Clockworks.com This changes to 2@9.9 and 1@7.7 in 60mm diameter if the pendulum bob is 8 1/2 inches or wider. These specifications do not apply if the clock has 5 or 9 big tubes on the back. Also this rule is not for all Grandfather clock weights but the vast majority of the post WW2 German units. ### Close enough is good enough The weight specs list it as 4.7 or 6.6, however this is really being too picky. If getting it close to those numbers that is fine. In fact if ordering a 4.7 lb weight, it may come 5.3 or whatever, but that is just fine. There has to be some sort of reference for the factory to label the [Grandfather clock weights](https://www.clockworks.com/clock-parts/mechanical-grandfather-clock-weights.html) so it is what it is. Just know if it is a pound over that is fine. If it's a little under, that is fine also. They do not have to be exact. ### Often wrong from the start In fact, there is a lot of clocks in the world sold new with the wrong [Clock Weights](https://www.clockworks.com/clock-parts/mechanical-grandfather-clock-weights.html) on them from the start. [Clockworks](https://www.clockworks.com/) will do a repair and they will say the clock ran for 30 years straight and come to find out they had Grandfather clock weights that were a pound or two too heavy. If the weights are a little too heavy it is fine. A lighter weight may or may not be fine because it may not trigger the movement to work properly. ### Grandfather Clock Weights Description - Conclusion Grandfather clock Weights are not cheap mainly because they are so heavy to keep, ship, store, move from here to there. Sure one weight set of three is less than 30 lbs but that adds up quickly in a stack of [weight](https://www.clockworks.com/clock-parts/mechanical-grandfather-clock-weights.html) sets. With that said, we don't want to ship these back and forth. It is best to get the right weights the first time. To return these is not an inexpensive or easy task. For example, suppose we charge $30 to ship these and for some reason they are wrong. Then it is $30 to get them back to us and another $30 to send out a new set. In addition, UPS charges a fee to send a call tag for them to come back. That is $110 to UPS for no reason. So if there are questions, please ask. *The content of this website is copyright by [Clockworks Inc.](https://www.facebook.com/ClockworksUSA)