CROSSCUT SLED
Every part comes out sized to ride your saw. Measure it below.
Fit the sled to your saw: the slot width, depth and spacing, the distance from the table’s front edge to the blade, and how long a crosscut you want
Four tape measurements fit the sled to your saw.
CAN I BUILD THIS?
5 steps. One afternoon.
SHOP
8 MATERIALS TO GET · 6 TOOLS TO GET
HDPE miter bar: fits a plain ¾″ slot as sold.
CUT LIST
1 PANEL · 4 SIZES TO CUT
LABEL EACH PIECE
ClickTap a piece when it’s cut, clicktap again to undo. Pieces too thin to clicktap get their own row under the sheet.
2×4′ PANEL
0 OF 9 CUT- A: Base 24″ × 20″
- B: Fence layer 26″ × 3 1/2″
- C: Bridge layer 24″ × 3 1/2″
- D: Block layer 3 3/4″ × 3 1/2″
HDPE MITER BAR · ¾″ × 3/8″ × 18″
Cut the fence strips a hair long and trim them after the glue-up. The base is the one piece that has to be square: check it corner to corner.
BUILD STEPS
5 STEPS
- REORIENT
- REORIENT
The runners are the whole jig: they hold the sled square to the blade on every pass. Setting them in the slots and gluing the base down onto them puts them exactly where the slots are — no measuring, no layout. The pennies lift them so the glue meets the base while the base still sits on the table.
ABOUT THIS PLAN
A crosscut sled has no size of its own. Your saw gives it one. So this plan never asks you to trust a drawing of someone else’s saw: it asks for four numbers off a tape (how wide and how deep your miter slots are, how far apart they sit, and how far the blade stands back from the table’s front edge) plus the longest crosscut you mean to make. Your runners come out sized to your slots, the base comes out 24″ across them, and the whole thing rides on the table the way a sled has to, with no side play and no rocking.
Everything but the runners and the track cuts from one ¾″ birch project panel: the base, two fences of two glued layers each (1½″ × 3½″), and a 3″-thick block the blade parks inside at the end of every stroke. The far fence is only a bridge: it holds the two halves of the base together once the blade has cut between them. The near fence is the one that matters. It swings on a single pivot screw, gets squared to the kerf the blade itself just cut, and locks. A T-track on its top takes a flip stop, so the second cut is the first cut again. Square from a good square is square enough for most of what a shop cuts. The optional 5-cut dial-in under step five, after the exit block is on, is for the builder who wants it closer, and it tells you which way to nudge the fence and by how much, in playing cards.
COMMON QUESTIONS
Do I need a crosscut sled if I have a miter gauge?
For a narrow board, no. The gauge that came with the saw crosscuts a 1×4 fine. A sled earns its place the moment the board gets wide: the whole workpiece rides on the sled instead of sliding on the table, so it cannot drift as you push, both ends of the cut are supported so nothing tears out, the fence is squared once and stays squared, and the blade parks inside a block instead of coming through the cut toward your hand. A stop on the fence then makes ten pieces the same length without measuring ten times.
What size should a crosscut sled be?
As big as the cuts you make and no bigger: a sled is lifted on and off the saw every time you use it. This plan sizes the base from two things: how far apart your miter slots are (the base reaches 7″ past each one, never under 24″ wide) and how long a crosscut you want (the base runs that much plus the two fences and an inch of room front to back). Sixteen inches of crosscut covers most shelf and cabinet parts.
What is the best material for a crosscut sled base?
Something flat that stays flat: 3/4″ birch plywood, which is what this plan cuts everything from: the base, both fences and the exit block, off one 2 × 4 ft project panel. MDF is flatter still but heavy, dusty and soft at the edges; a fence made of it dents. Baltic birch is the premium version of the same idea if your store carries it in a small panel. Whatever the base, wax its underside and the runners once it is built.
How do I make the runners fit my miter slots?
You measure the slots and the plan decides. A plain 3/4″ slot at least 3/8″ deep (the bar’s own height, so it never stands proud of the table) takes the store-bought 3/4″ × 3/8″ HDPE bar as it comes. It never swells, and it drops in. Anything else (a slot with a T undercut, cast-in tabs, a slot that is not 3/4″ wide) gets two runners ripped from a hardwood hobby board to your slot minus 1/32″ both ways, so the base rides on the table and not on the runner. Either way, step one sets them in the slots on a few pennies and glues the base down onto them. The slots put the runners exactly where they belong, with nothing to measure.
Why is a miter sled a different jig?
Because its fence is set at 45°, and a fence set to an angle is a fence you cannot square to the kerf. This sled’s whole design is one square fence, squared once, locked, and never moved. Every cut it makes is 90°. Angled cuts belong to a miter sled with its own two fences at 45°, or to your miter gauge for the odd one.
What is the 5-cut method, and do I have to do it?
You do not have to. Squaring the fence to the kerf with a good combination square gets you a sled that cuts square by any square you own. The 5-cut method is the dial-in for the builder who wants it closer: cut all four sides of a scrap panel against the fence, turning it the same way each time, then take a fifth cut and keep that thin offcut. Measure its width at both ends with a caliper. Because the four cuts stacked the fence’s error four times, the difference in width over the offcut’s length is four times the fence’s error per inch. The calculator under step five turns that into how far to nudge the lock end of the fence and which way, in thousandths and in playing cards (one card is about 0.009″). Back out the lock screws, nudge, re-drive, cut again.
What is the block on the front for?
It is where the blade lives at the end of the stroke. The near fence is the one your board rests against, and the blade comes through it toward you as the cut finishes; without the block, the blade would come out the other side of the fence into open air, exactly where your hand is pushing. The block is 3″ of glued birch centered on the kerf, so the blade finishes inside wood. It is not a stop for the sled. Keep the four rules on step five: offcut clear of the stop, stop pushing when the board is through, hands on the fence and never past it, and the saw off with the blade stopped before you pull the sled back.
Will the fence be in the way of a tall board?
No. The fence stands 3 1/2″ tall on a 3/4″ base, so its top sits 4 1/4″ above your saw table, 3/4″ higher than the tallest cut any jobsite saw in the class can make (3 1/2″), and the T-track rides on top of that, out of the blade’s reach. Two layers glued face to face make it 1 1/2″ thick, which is what keeps a 3 1/2″ fence from flexing; one layer would.
Why does it stop at a 16″ crosscut?
Because 16″ is the biggest sled one 2 × 4 ft panel builds, and the plan never adds a second panel to your list. The base is cut across the panel’s 24″ width with its depth along the 48″ length, and the near fence (26″ long, two inches past the base for the stop) comes off what is left of that length. At 16″ of crosscut the base is 20″ deep, and 20 plus a saw kerf plus 26 fits in 48. Everyday sleds run 12″ to 16″; a sled for wide panels is a bigger, heavier build of its own, and this plan does not draw one.