In determining how large a figure may be cast on any size of slug from 5- to 12-point, bear in mind that not over eleven points of the figure may be cast against the lip of the mold cap.
Carbolite
There is an adjustable mold used on some machines which is made of carbolite steel. This mold is harder than the regular U. A. mold and will not warp easily. However, it heats up quicker, retains the heat longer and will not work very satisfactorily for large slugs or where a large amount of metal is used. The regular U. A. liners are used on this mold.
36-em Adjustable
The universal adjustable molds for 36-em machines will cast any measure from 30- to 36-ems inclusive, from 5- to 14-point body. If a measure shorter than 30 ems is desired a regular 30-em mold must be used.
In order to change liners on a 36-em mold it is necessary to take the mold from the mold disk, as the liners fit around three sides of the post, and can not be changed in the regular way.
It is possible to remove the 36-em mold from the disk and substitute a 30-em mold. A filling piece is required to take up the difference between the 30-em and the 36-em mold.
Mold Wipers
There are two felt wipers which are designed to keep the face and back of the mold clean. A small amount of a mixture of cup grease and graphite rubbed into the back wiper will keep the base of the mold clean. For the front mold wiper, keep the felt well saturated with graphite. Do not use oil or grease on the front wiper, or it will be transferred onto the matrices and into the magazine. A good plan is to soak the felt with gasoline and rub the graphite in. When the felt becomes worn, new ones should be applied. When applying new felt, put graphite between the layers. Be careful that the felt does not become worn to the extent that the steel part of the wipers will be allowed to rub against the mold.