The right lapidary blade must suit both the exact machine and the material. Treat every marketplace title as an offer identity, not a compatibility certificate: confirm the selected variation’s diameter, arbor, maximum rated RPM, construction, core thickness, kerf, coolant and application before ordering.
Start with the exact saw model, then match blade diameter and arbor, verify the blade maximum rated RPM against the machine speed, and only then compare construction, material application, core thickness and kerf. Any missing field keeps the fit unresolved.
Use these documented machine requirements as a first screen
Machine
Diameter and arbor
Machine speed used for screening
Included-blade evidence
Hi-Tech 4″ / 5″ trim saw
4″ or 5″; 5/8″ arbor
Variable, 800–3,400 RPM
Both included notched blades: .010″ core × .013″ kerf
Hi-Tech 6″ trim saw
6″; 5/8″ arbor
Variable, 800–3,400 RPM
Saw page: notched .012″ × .015″ and red sintered .015″ × .023″; the separate sintered-blade selector shows .016″ × .023″ for one variation, so confirm the supplied part
Hi-Tech 10″ slab saw
10″; 5/8″ arbor
Product page: 1,725 RPM; use the stricter current machine label/manual where sources differ
Included notched .031″ × .044″ and sintered .031″ × .038″
This table documents Hi-Tech machine requirements and included blades; it does not certify the third-party offers below. A matching diameter and arbor are only the first two checks. The Blade Checker uses 3,400 RPM for the variable-speed trim saws and preserves a conservative 1,740-RPM screen for the 10-inch model because manufacturer sources have conflicted.
Have the exact blade documentation and machine label in front of you? Run the Blade Checker.
Compare the current verified offers
The cards below preserve manager-returned offer titles, images and tagged destinations. Some titles omit a blade rating or do not label whether a thickness figure is core or kerf. Use them to identify candidates, then verify the selected variation with the blade maker before installation.
As an Amazon Associate I earn from qualifying purchases. Check the current listing for price, availability and included accessories.
Diamond blade
Gemking 6 Inch Lapidary Diamond Saw Blade, Ultra-Thin .040" x 5/8" Arbor, Continuous Sintered Notched Rim for Agate, Jade, Petrified Wood & Gemstones
Compare the listing specifications with your machine manual before choosing a blade.
A parent listing can combine several diameters, thicknesses or arbor options. Record the exact variation and part number. A title that says only “thin,” “super-thin” or “.040 × 5/8 arbor” does not establish whether the first number is core thickness or kerf.
Keep the two speed numbers separate
The saw’s operating speed and the blade’s maximum rated RPM answer different questions. The blade rating must cover the machine speed used for the check. If the listing omits a rating, keep compatibility unconfirmed rather than borrowing one from a similar blade.
Decode construction cautiously
Notched, continuous, electroplated, sintered and metal-bond describe different features, but marketplace phrases can combine them ambiguously. Use the blade maker’s own construction and material guidance; do not turn a seller title into a universal performance ranking.