Signature Plastics SA family
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| Manufacturer | Signature Plastics |
|---|---|
| Surface profile | Spherical |
| Inscriptions | Double-shot |
| Keycap mounts | Various |
The SA family is a spherical keycap profile family offered by Signature Plastics. "SA" denotes spherical keycaps, with the same profile across all rows. Originally a flat profile, SA was followed by the spherical sculptured SS profile, which was later retired. SA itself was later retooled for a sculptured profile, but retained its existing name.[1]
According to Signature Plastics, this family was originally made to fit keyboards made before 1980. Currently, this family does contain space bars which measure 4, 6.25, 7 and 8 units, which were most widely used back then.
Available keycap sizes and shapes
- S: semi-matte (smooth) top and sides
- G: gloss top and sides
- M: matte top (rough), semi-matte sides
The size is in units × 100. Space bars are row 3 with convex top.
Rows 2 and 4 are identical. Legends for all rows can be used 180 degrees turned. 1 units row 3 keys are symmetrical by 90 degrees. For example row 4 Z can serve as row 2 Z in DE-layout. Row 3 cursor arrows are usable for all 4 directions.
Table of confirmed key sizes
| Angle | -13 | -7 | 0 | 7 | 0 | |
| Size | row 1 | row 2 | row 3 | row 4 | space | |
| 100 | SGM | SGM | SGM | SGM | ||
| 100C | S M | S M | center nub (slightly off-center) | |||
| 100D | SGM | deep dish | ||||
| 125 | S M | S M | S M | |||
| 150 | S M | S M | SGM | S M | ||
| 175 | S M | S M | S | S M | ||
| 175S | S M | stepped, off-center mount (like 1.25 units key) | ||||
| 200 | S | S M | SGM | S M | Stabiliser 0.625 units left and right | |
| 200P | S | S M | SGM | S M | fits on 2 switches | |
| 225 | S | S | S | Stabiliser 0.625 units left and right | ||
| 250 | S M | S | Stabiliser 0.625 units left and right | |||
| 275 | S | S | S | Stabiliser 0.625 units left and right | ||
| 300 | SGM | Stabiliser 1 unit left and right | ||||
| 400 | S M | Stabiliser 1.5 units left and right | ||||
| 450 | S | Stabiliser 1.82 units left and right | ||||
| 625 | S | fits Cherry, Filco and Leopold | ||||
| 700 | S | Stabiliser 3 units left and right, 2.25 units right | ||||
| 800 | SGM | Stabiliser 3.5 units left and right | ||||
| 900 | S M | Stabiliser 3.5 units left and right | ||||
| 2X2 | S | Stabiliser 0.625 units left and right in one row | ||||
| JRET | S | ISO-Return (1.5x2x1.25) |
References
- ↑ Pimp My Keyboard — The Origin of SP Keycap Families
