Craftsman 31517251 auto-scroller saw Parts

Scroll saw blades are only interchangeable when the blade end style matches your Craftsman model 31517251 (pinned vs. pinless) and the blade length fits the clamps. Within the correct end style, you can usually swap blade sizes and tooth patterns to match the cut.

What you must match first (pinned vs. pinless)

Before buying blades for a Craftsman 31517251 auto-scroller saw, confirm the blade mounting style:

• Pinned blades have small cross pins at each end; they fit saws with pin hooks or pin slots.
• Pinless (plain-end) blades have no pins; they clamp directly in blade holders.
• Some saws accept both styles with the right holders, but you still need the correct setup.

What can vary (and still be interchangeable)

Once the end style and length fit, these blade features are interchangeable and chosen based on your material and cut quality:

• Blade size/number (thicker for straighter cuts; thinner for tight turns)
• TPI (teeth per inch) (higher TPI for smoother cuts; lower TPI for faster, rougher cuts)
• Tooth style (skip tooth, double skip, reverse tooth, spiral)
• Material (carbon steel vs. hardened/high-speed for tougher stock)

Quick selection guide

Cutting goal	Typical blade choice	Why
Tight curves, fretwork	Smaller, thinner blade	Turns easier without binding
Smooth edges in thin wood	Higher TPI	Cleaner finish, less tear-out
Faster cuts in thicker wood	Lower TPI, wider blade	Clears sawdust better
Clean bottom surface	Reverse-tooth	Reduces underside splintering

Why it matters

Using the wrong end style can prevent the blade from mounting securely, and the wrong TPI or blade thickness can cause burning, wandering cuts, or frequent blade breaks.

Helpful tip for buying the right blade

If you are not 100% sure you have the correct model number, verify it on the saw’s data label before ordering parts or accessories; our guide explains where to look: how to find your appliance model number (and what it means for parts).

Last updated: February 2026

Yes. You can make straight cuts with a Craftsman scroll saw model 31517251, but it takes more setup and technique than a saw designed for ripping. Blade drift and flex can pull the cut off-line, so short straight cuts are realistic; long, perfectly straight cuts are harder.

Best practices for straighter cuts

• Use a fresh, sharp blade; dull teeth wander and burn.
• Increase blade tension until the blade “pings” when plucked (firm, not over-tight).
• Choose the right blade for the job:
  • Wider blades track straighter than very fine blades.
  • More teeth per inch (TPI) helps on thin stock; fewer TPI clears sawdust better in thicker wood.
• Keep steady feed pressure; pushing too hard deflects the blade.
• Support the work flat on the table and keep the wood tight to the surface.
• Make a test cut in scrap and adjust your technique before cutting your project piece.

How to reduce blade drift (what to watch for)

Blade drift is the tendency for the blade to cut at a slight angle even when you feed straight.

What you notice	Common cause	What to do
Cut slowly curves off the line	Dull blade or wrong blade type	Replace blade; pick a blade matched to thickness
Cut starts straight then wanders	Too much feed pressure	Slow down; let the teeth do the work
Cut leans left/right consistently	Blade not tracking straight	Re-tension and re-seat blade; re-test on scrap
Burning or heavy sawdust packing	Too fine a blade for thickness	Use fewer TPI or a more aggressive blade

When a scroll saw is the right tool (and when it is not)

A scroll saw excels at curves, inside cutouts, and delicate work. For long straight rips, a table saw, track saw, or circular saw with a guide is typically the better choice.

Why it matters

Straight cuts depend on controlling blade deflection. With a scroll saw, small changes in blade tension, blade choice, and feed rate have a big impact on accuracy and edge quality.

For general DIY technique and tool prep that also applies to scroll saw work, we recommend reviewing are diy appliance repairs safe.

Last updated: February 2026

For a Craftsman 31517251 scroll saw, we recommend pinless (plain-end) blades for most projects because they fit more blade styles and make inside cuts through small starter holes much easier. Pinned blades are sturdier and quicker to change, but they limit detail work.

Quick comparison

Feature	Pinless (plain-end) blades	Pinned blades
Best for	Fretwork, lettering, puzzles, tight curves	Thicker stock, rougher cuts, quick swaps
Inside cuts	Excellent (small pilot holes)	Limited (needs larger holes)
Blade variety	Widest selection (skip-tooth, reverse-tooth, spiral)	Fewer options
Setup	Needs blade clamps/adapters	Uses pins; often faster changes

How to choose for your project

• Choose pinless when you need clean detail, tight turns, or frequent inside cuts.
• Choose pinned when you want simple blade changes and you are cutting larger, less-detailed shapes.
• For mixed work, keep both on hand; use pinned for quick roughing and pinless for finish and detail.
• Match blade size to material thickness; most scroll work in 1/8 to 3/4 inch stock runs best with smaller pinless blades.
• If your saw uses pinned holders, use a pinless adapter so you can run plain-end blades.

Setup tips that prevent broken blades

• Tension the blade so it “plucks” with a clear ping; too loose wanders, too tight snaps.
• Let the teeth do the work; pushing hard overheats and breaks blades.
• Use the right tooth direction (most cut on the downstroke); reverse-tooth helps reduce bottom tear-out.
• Start with a fresh blade; dull blades drift and burn wood.

Why it matters

Blade type directly affects cut quality, how small your inside-cut holes can be, and how much control you have on curves. For detailed scroll saw patterns, pinless blades give the control and selection most users need.

For tool and repair basics that help with testing switches, cords, and connections on power tools, see how to use a multimeter to test electrical parts video.

Last updated: February 2026