Make cleaner cuts in gem rough, petrified wood and cabochon material with less waste. The MK Diamond MK-303 8-inch x .025-inch x 5/8-inch Continuous Rim Lapidary Blade (part 153693) is built for lapidary hobbyists, rock shops and small studios that cut valuable stone and want a smooth finish straight off the saw.
Built for
- Slabbing and trimming agate, jasper, quartz, jade and petrified wood.
- Cutting rare or expensive rough where every bit of material counts.
- Producing cabochon blanks and slices with a smooth surface that needs less grinding afterward.
- Lapidary shops, rock clubs and hobbyists running a water-cooled trim or slab saw.
Why this blade
The MK-303 is the Professional grade lapidary blade from MK Diamond. Its continuous rim, with no notches or gaps, produces smoother cuts than notched rim or plated diamond blades, and MK Diamond states it lasts longer and cuts faster than those designs. That combination is what lapidary users look for: speed without chipping the edge of a good stone.
At .025 inch, the rim strikes a balance between a narrow kerf and everyday toughness. It wastes little material but holds up well to regular use on agate, jasper and similar stones.
Eight-inch blades give you more cutting depth than the smaller sizes, which helps when slabbing mid-size rough and larger agate nodules.
The 5/8-inch arbor hole fits saws built for a five-eighths-inch spindle. Check the arbor on your saw before you order, because a blade with the wrong bore will not mount.
Specifications
- MK Diamond part number: 153693
- Series: MK-303 Professional, continuous rim
- Diameter: 8 inch (203mm)
- Rim width: .025 inch
- Arbor: 5/8 inch
- Rim height: 5mm
- Use with a water soluble coolant
Use and care
Run the blade wet with a water soluble coolant. When you are done, dry it and treat it with an anti-rust lubricant for storage. Stock arbors can be bushed down to smaller sizes, and special arbors are available from MK Diamond on request, so mention it when you order if your saw needs something different. Always follow your saw manufacturer instructions and wear eye protection when operating a lapidary saw.
Choosing the right MK-303
The MK-303 line covers diameters from 4 inch up to large segmented blades, in several rim widths and in half-inch, five-eighths-inch and one-inch arbor sizes. Start with the diameter your saw is rated for, then match the arbor, then choose the rim width. Thinner rims waste less stone; thicker rims are more rigid. If you are unsure which combination fits your machine, send us your saw make and model and we will help you match the part number.
Frequently asked questions
What is the MK-303 blade used to cut?
The MK-303 is a Professional grade continuous rim lapidary blade made for rare and valuable materials such as agate, quartz, petrified wood, jasper and jade, where keeping waste to a minimum and cutting quickly both matter.
What are the specifications of part 153693?
Part 153693 is a 8-inch (203mm) blade with a .025-inch rim width, a 5/8-inch arbor and a 5mm continuous rim height.
Does it need coolant?
Yes. The MK-303 is designed for use with a water soluble coolant. Do not run it dry.
How should I store the blade?
Dry the blade after use and treat it with an anti-rust lubricant before storing it, as MK Diamond recommends for MK-303 blades.
Is this the right arbor for my saw?
This blade has a 5/8-inch arbor. MK Diamond lists the MK-303 in several arbor sizes, so match the bore to your saw spindle before ordering.
Discount Cleaning Products is an authorized MK Diamond dealer with US-based customer service. Call or send us a message if you need help matching a blade to your saw.
