Grinders for Removing Mortar Ravenglass
Grinders for Removing Mortar
Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: September 1, 2000
By Carolyn SchierhornAbstract:
Small disc grinders are indispensable for repair contractors who do a lot of masonry repointing. These electric-powered right angle grinders allow hardened mortar to be cut out quickly and efficiently. Some people think grinders should never be used on historic masonry because of the risk of damaging the masonry units, while others contend that grinders can be used on historic structures but only in certain circumstances. The soft lime mortar used in older masonry buildings can be removed with hand chisels; in contrast, the very hard mortar used in many modern buildings may require the power of a grinder for removal.
The most popular disc grinders for masonry have 4-, 4 1/2-, or 5-inch cutting wheels. The grinder is powered by a small electric motor. Small disc grinders usually retail for less than $150, and for this reason are considered throwaway tools.
Even the modest projected 6-month life span assumes some minimal maintenance.
For repointing applications, contractors should generally use diamond cutting wheels, which can be more expensive than the grinder. Manufacturers admit that tuckpointers typically buy lower-priced blades and throw them out when they show signs of wear.
When small disc grinders are in constant use, small differences in power output, tool weight, and other features can make a big difference in productivity and safety.