Frequently Asked Questions (FAQ’S)
Q: What is the major difference between Holey Galahad and Galahad CG?
A: Holey Galahad has openings in the surface that allow you to “see through” to the item being sanded. Galahad CG has a solid surface and is 1/2” (13mm) larger in diameter. Holey Galahad has been shown to increase productivity by 10-15%.
Q: What are the size differences?
A: Holey Galahad is 4” (100mm) diameter and has 7/8” (22mm) centers but will fit angle grinders worldwide using our Universal Flange and Nut Set. Galahad CG is 4-1/2” (115mm) in diameter and is available with 5/8” (16mm) or 7/8” (22mm) center holes.
Q: What Angle Grinders fit Holey Galahads?
A: They’re designed to fit most 4-1/2” – 5″ standard (imperial) and 115mm – 125mm metric angle grinders. Maximum 14,000 RPM. All Holey Galahad discs are 4” (100mm) in diameter with 7/8” (22mm) center hole size to suit angle grinders worldwide by being seated on the manufacturer’s 7/8” (22mm) arbor. This is a spacer located at the bottom of the center shaft and the 7/8” (22mm) arbor is a raised round shoulder as an integral part of the spacer/washer. If your flange at the base of your grinder is missing we have replacements available in either 5/8″ or 14mm.
Q: Are they made in the USA?
A: Very proudly, yes! This is US technology, patented worldwide and made in the USA.
Q: How many different shapes or profiles are available for the Holey Galahads?
A: Two, rounded and flat. The rounded profile is extremely suitable for round, concave and contoured surfaces like the inside of bowls or scalloping out chair seats. The flat profile is most useful in smoothing out notches on logs, removing large amounts of bark or smoothing out large, predominantly flat surfaces like doors, beams and mantle pieces. Either the flat or round profiles will do any job above. The above applications are recommendations based on experience and are a guide for you to determine the best profile for your application.
Q: What models are Holey Galahad available in?
A: There are eight models. Four round profile and four flat profile.
1) Model # 47854 REP Round Extreme Purple 120 Grit – Extremely swift removal with course finish. Great for rounded, concave and contoured shapes.
2) Model # 47851 RCB Round Coarse Blue 90 Grit – Rapid removal with smooth, course finish. Great for rounded, concave and contoured shapes.
3) Model # 47852 RMR Round Medium Red 70 Grit – Rapid removal with medium to fine finish. Great for rounded, concave and contoured shapes.
4) Model # 47853 RFG Round Fine Green – Doesn’t need much to finish sanding. Great for rounded, concave and contoured shapes.
5) Model# 47874 FEP Flat Extreme Purple 120 Grit – Extremely swift removal leaving a course finish. Great for long, flat surfaces.
6) Model # 47871 FCB Flat Coarse Blue – Rapid removal with smooth, coarse finish. Great for long, flat surfaces.
7) Model # 47872 FMR Flat Medium Red – Rapid removal leaving medium to fine finish. Great for long, flat surfaces.
8) Model # 47873 FFG Flat Fine Green – Doesn’t need much to final finish. Great for long, flat surfaces.
Note: The coarser the grit, the more aggressive and less cleaning is required. Each model leaves a different finish.
Q: What is your Universal Wrench, Flange and Nut Set used for?
A: The KATools Universal Wrench, Flange and Nut Set allow you to attach disc accessories to any make or model power tool with a 5/8” or 14mm spindle thread shaft. The unique recessed hexagonal nut and flange back allow universal fit, so you can easily secure and tighten any type of accessory from any manufacturer.
Q: Should I remove the safety guard?
A: No! No! and Heck No! Please do not work without a safety guard for any reason. It’s a hazard to your health and safety. Any foreign objects in the wood or material will be deflected away by the guard versus coming toward you. Should you hit an immovable object and you lose control of the angle grinder, you’re much safer with the guard on.
Q: What happens if I hit a nail, wire or foreign object in the wood? Or what if I drop the Holey Galahad or Galahad CG disc on the ground?
A: You will more than likely lose some carbide grits or cones where you made contact with the obstruction or dropped it. This isn’t a big deal and you can easily continue working – unless you lose so many it affects your finish and production – then you need a replacement.
Q: Why are they so expensive?
A: Because the grits consist of tungsten carbide needles and manufacturing is an intense 5 stage patented process. Actually, these high quality discs have proven longevity and can be used over and over again, saving hundreds of dollars in sandpaper, time, labor and effort.
Q: What is the best angle to position the safety guard?
A: Holey Galahad discs are designed to cut with the safety guard set between 23 degrees to 45 degrees. The angle of adjustment for the safety guard varies with each disc grinder manufacturer.
THE MAIN CRITERIA IS THAT THE BOTTOM OF THE SAFETY GUARD MUST BE AS LEVEL AS POSSIBLE WITH THE BOTTOM OF THE BODY OF THE DISC GRINDER.
In this position, the SAFETY GUARD WILL ADJUST BETWEEN THE (APPROXIMATE) ANGLES OF 23º and 45 º.
SAFETY FIRST: Why Safety Guard Use Is A Requirement
1. Safe and efficient operation: Holey Galahad discs were designed to shape and carve with the bottom and partially exposed left side peripheral edge as well as on their face. With the safety guard rotated to the correct position as stated in these instructions, it opens up the bottom surface of these discs near the bottom of the grinder. This is where a considerable amount of the main shaping and carving is done and is:
A) A vital part of the tools’s versatility
B) Allows for optimum carving use in a comfortable and safe position.
2. Direction of Waste: With the safety guard properly adjusted, direction of wood shavings and sawdust will be angularly deflected over the top of Holey Galahad, hitting the top of the work piece and away from the operator’s hands and face. If the guard is retained at 90 degrees, the full left face, including the nose (or front tip) of the Holey Galahad will be exposed. In this position Holey Galahad will not carve smoothly or effectively and poses a potential hazard to the user by jerking to either side.You don’t want to ruin your work piece nor run the risk of a violent motion with the grinder being jerked sideways. We absolutely do not recommend moving or retaining the safety guard at 90º or even close to this vertical position.