All the basic difference between the heads of two things: shank size and head quality.
Shank size depends on what you are using chisel blade clamp specifications, the two most common
Standard size for high-load work 1 / 2 " blade and general engraver at the low end of the more common 1 / 4" blade, although some special kind of mechanical devices use different specifications, but not common . Some engraving machine in addition to the standard 1 / 2 " head jig can be used outside also comes with a 1 / 4" blade bushing . Why is there two standard tip it? 1/ 2 " shank diameter specification is to enable the development of engraving machine can clamp tighter grasp the handle , so the larger the blade head with some of the high work load . Use 1 / 4" head engraving machine is generally not designed for the high work load , and therefore there is no need to convert the device with clamps . Metallic materials used in the manufacture heads are quite expensive, so a 1/4 " tip relative price 1 / 2" to be a lot cheaper .
Head mass can be divided into three categories, namely steel blade, inexpensive and high-quality carbon steel carbon steel blade tip blade / full carbon ( industrial grade ) heads overall. Carbon steel blade tip relative to the daily needs more polishing heads , because they can easily blunt blade . Cheap carbon steel blade and durable than ordinary steel blade to a number , but also become blunt , and only 2-3 times a polished , part of the blade on steel after it was completely worn out. Materials used in high-quality carbon steel blade better , stay sharp longer, the number can also more polished , more than three times life can be cheap steel tip . Although high-quality blade expensive, but in the long run they are still good value for money .
Safety Alert ! Because the normal working engraving machine is the premise of using a sharp blade , so if you use a blunt head , and you do not consciously pushing engraving machine increases the force , then the engraving machine is not normal work , there may be damage to the wood . The correct solution is to blunt head when you realize that when the plane should be appropriate to reduce the depth of each engraving machine sales and slowing movement speed .