SKILSAW SPT77WML-01 15-Amp 7-1/4 in. Lightweight Worm Drive Circular Saw: problems, parts and running costs
Checked: 2026-10-19
Summary
The SPT77WML-01 is a 15 A worm drive circular saw that SKIL says is the lightest it sells at 11.5 lb, aimed at framers and carpenters who want worm drive torque without the weight penalty. The main cautions are spec-level: no dust blower, no electric motor brake, and a warranty conflict between SKIL’s one-year statement and a retailer’s five-year listing. The only recurring ownership cost is replacement blades. At $219.99 it is a premium buy over the steel-foot sibling; above $250 it is hard to justify.
Common problems and fixes
- No dust blower — the saw has no dust blower, so extraction is not built in. Plan for external dust collection or accept the limitation. [2][3][4]
- No electric motor brake — the saw has no electric motor brake, and worm drive saws have long coast-down as a class characteristic. No measured coast-down time was found. [2][3][4]
- Weight claim excludes blade, cord and wrench — SKIL’s 11.5 lb figure is qualified as “without blade, cord and wrench,” so real carrying weight is higher by an unmeasured amount. [2]
- Warranty conflict — SKIL’s own page states a 180-day money-back guarantee plus a one-year limited warranty, while Acme Tools’ structured data lists a 5-year warranty. The manual could not be checked because skil.com blocked automated access. Treat the one-year figure as the manufacturer’s stated coverage until the manual confirms otherwise. [2][5]
- Arbor data error — SKIL’s spec table lists the arbor as “Diamond,” which is not a dimension. The sibling SPT77W-01 publishes 5/8 in. Confirm the arbor size before buying blade or arbor hardware. [2][3][6]
Parts and consumables
- 24-tooth carbide replacement blade (75724W) — $6.99 from SKIL. No replacement interval is in the sources. [1]
- 40-tooth carbide replacement blade (75740W) — $12.99 from SKIL. No replacement interval is in the sources. [1]
Yearly running cost
The only recurring outlay is replacement blades: $6.99 for the 24-tooth or $12.99 for the 40-tooth, depending on how often you replace them. No other consumables, filters or subscriptions are reported. Not enough data for a precise yearly cost.
When it is a good buy
Price thresholds: at $219.99 (SKIL direct and Ace Tool Group), the saw sits at a premium of roughly $20 over the aluminum-foot sibling SPT77W-01, which dealers list at $199.00 to $199.95. That premium buys magnesium in the gear housing and foot and the claimed 11.5 lb weight. The -72 configuration at $249.99 substitutes a 24-tooth Diablo blade; SKIL’s own product-page answer says the two kits are the same saw, so choose based on the blade you would have bought anyway. Above $250, the saw is hard to justify without independent test evidence. Named alternatives: the SPT77W-01 sibling if you want to save $20 and do not need the magnesium weight saving. [1][2][3][4][5][6]