Spline Dimensions: straight sided
ss 6 11 14 m to ss 6 28 32 l
Spline dimensions for three families: (1) ANSI B92.1-1970 (R1993)/1996 involute splines — flat root side fit, fillet root side fit, and major diameter fit, 30-degree pressure angle, diametral pitches 2.5/5 through 20/40; (2) ISO 14:1982/2004 straight-sided (parallel-sided) splines — light and medium series, 6/8/10 splines, metric mm; (3) DIN 5480-2:2015 metric involute splines — 30-degree pressure angle, modules m=2 and m=3, reference diameters 12–207 mm.
| spline type | record id | centering | iso14 designation | major dia mm (mm) | minor dia mm (mm) | num splines (count) | pressure angle deg (deg) | series | standard | tooth height mm (mm) | tooth width mm (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| straight sided | ss 6 11 14 m | internal diameter | 6 x 11 x 14 | 14 | 11 | 6 | 0 | medium | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 1.5 | 3 |
| straight sided | ss 6 13 16 m | internal diameter | 6 x 13 x 16 | 16 | 13 | 6 | 0 | medium | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 1.5 | 3.5 |
| straight sided | ss 6 16 20 m | internal diameter | 6 x 16 x 20 | 20 | 16 | 6 | 0 | medium | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 2 | 4 |
| straight sided | ss 6 18 22 m | internal diameter | 6 x 18 x 22 | 22 | 18 | 6 | 0 | medium | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 2 | 5 |
| straight sided | ss 6 21 25 m | internal diameter | 6 x 21 x 25 | 25 | 21 | 6 | 0 | medium | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 2 | 5 |
| straight sided | ss 6 23 26 l | internal diameter | 6 x 23 x 26 | 26 | 23 | 6 | 0 | light | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 1.5 | 6 |
| straight sided | ss 6 23 28 l | internal diameter | 6 x 23 x 28 | 28 | 23 | 6 | 0 | light | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 2.5 | 6 |
| straight sided | ss 6 26 30 l | internal diameter | 6 x 26 x 30 | 30 | 26 | 6 | 0 | light | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 2 | 6 |
| straight sided | ss 6 26 32 l | internal diameter | 6 x 26 x 32 | 32 | 26 | 6 | 0 | light | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 3 | 6 |
| straight sided | ss 6 28 32 l | internal diameter | 6 x 28 x 32 | 32 | 28 | 6 | 0 | light | ISO 14:1982 / ISO 14:2004 Straight-sided splines for cylindrical shafts with internal centering (BS 5686:1986); RoyMech reference tables (roymech.co.uk), confirmed against ISO 14 and BS 5686 | 2 | 7 |
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