SMT stencil types

Covers almost every PCB assembly process.

Frameless from $6.00 · Framed from $10.50 — step stencils quoted from your Gerber.

Fiber laser cutting head cutting apertures into a stainless steel stencil sheet
01 Fiber laser cutting of stainless foil
Dense laser-cut aperture pattern in a stainless steel stencil, shot at an angle
02 Apertures, up close
Electropolished framed SMT stencil with a mirror-smooth stainless steel foil
03 Electropolishing and nano coating
A gloved hand fitting a framed stencil onto the printing table
04 Fitted to the printing table
±0.01 mm Aperture tolerance Apertures checked against your file
SUS304 Stainless steel Laser-cut stainless foil
0.07 mm Minimum aperture For fine-pitch and BGA work
0.08 – 0.30 mm Foil thickness Standard thickness, or step-etched
01

Framed stencils

Stainless foil tensioned onto an aluminium frame, ready to drop into an automatic printer. The usual choice for production lines.

Best for: Volume SMT lines running automatic printers, where fast changeover matters.

Framed SMT stencil shown apart: the stainless foil and the aluminium frame it is tensioned into
Frameless SMT stencil: a bare laser-cut stainless steel foil, no frame attached
02

Frameless stencils

Bare laser-cut foil, shipped flat. The lowest cost option, and the usual pick for prototyping, low-volume builds and R&D testing.

Best for: Prototyping, low-volume builds and R&D testing.

03

Step stencils

Different foil thickness in different areas of one stencil, so mixed-technology boards with fine-pitch and through-hole parts print correctly in one pass.

Best for: Mixed-technology boards with fine-pitch SMD and through-hole parts on the same side.

Step stencil photographed on the bench: laser-cut apertures in a stainless steel foil
Technical guide

Understanding stencil specifications

A short guide to the options you choose when ordering. If you are unsure what your board needs, send us the Gerber file and we will advise.

Frame size

Stencils mount into the printer on a frame. Common sizes are 584 × 584, 550 × 650 and 736 × 736 mm, plus the 400 mm-wide series from 400 × 600 up to 400 × 1500 mm. Which one you need depends on your printer model and the largest board you run.

Foil thickness

Thinner foil deposits less solder paste. Values run from around 0.08 mm for fine-pitch work up to 0.30 mm for large through-hole joints. 0.12 mm is a common starting point for mixed boards.

Aperture and area ratio

Apertures are the openings the paste passes through. As a rule of thumb, the opening area should be at least two thirds of the aperture wall area, or paste will not release cleanly. This is what limits how fine a pitch a given foil thickness can print.

Surface finish

Laser cutting leaves a slightly rough aperture wall. Electropolishing smooths it and improves paste release. Nano coatings reduce how much paste sticks to the foil, which cuts how often you have to clean it.

Frame tension

On framed stencils the foil is stretched into the frame. Even, adequate tension keeps the foil flat against the board during the print stroke, which matters most on large boards.

Not sure what to order?

Send us your Gerber file and tell us what you are assembling. We will tell you which stencil type and thickness suits the board, and quote it.

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Also available

Frameless stencil printing table

For printing solder paste onto PCBs before assembly — R&D prototyping, repair and rework, and small-batch SMT production.

Frameless stencil printing table: a PCB clamped on the spring-loaded sled, with the locating jigs shown alongside
  • The stencil lifts evenly after each print — less smearing on the board.
  • Upgraded spring-loaded PCB sled: the foil rises cleanly after the squeegee pass instead of dragging across the pads.
  • Multiple locating jigs — free positioning for different PCB sizes.

Priced by model and quantity — tell us your board size and how many you need.

10 × 1015 × 1520 × 20
Printing table size135 × 165 × 50 mm215 × 220 × 65 mm260 × 265 × 65 mm
Largest PCB (long side)65 × 120 mm115 × 170 mm165 × 220 mm
Effective print area55 × 80 mm100 × 130 mm150 × 180 mm
Printing speedManual
PCB thickness0.8 – 1.6 mm (shipped set to 1.2)0.8 – 2.0 mm, free lift0.8 – 2.0 mm, free lift
Machine weight750 g1680 g2010 g
Included accessories4" squeegee × 1 · Phillips screwdriver × 1 · hex key × 1 · magnetic locating posts × 2

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