TUFNOL Technical information

Tolerances for Moulded Round Tubes

(Click here for Tolerances on Sheets.)
(Click here for Tolerances on Rods.)

The table below shows the dimensional tolerances permitted on moulded round tubes. These tolerances based on the relevant British Standards or BS EN Standards.

Tufnol Round Rods are normally supplied with an ‘as moulded’ bore and a ground outside diameter.

All sizes and tolerances quoted are in millimetres.

Dimensional tolerances specified are PLUS AND MINUS from the nominal size. .

Moulded tubes tolerances based on BS EN 61212 3-2

Nominal inside diameter (mm)	Maximum deviation (plus or minus mm)
£3	0.10
>3 £30	0.15
>30 £50	0.20
>50 £75	0.25
>75 £100	0.30
>100 £150	0.50
>150 £200	0.70
>200 £300	1.00
>300 £500	1.50
>500	2.00

Nominal wall	Maximum deviation, plus or minus mm
thickness mm	All paper grades	Carp, Lynx, 6F/45	All other Fabric grades
£1.5	0.25	0.28	0.40
>1.5 £3.0	0.40	0.45	0.60
>3.0 £6.0	0.55	0.60	0.85
>6.0 £12.0	0.90	1.00	1.35
>12.0 £25.0	1.30	1.40	1.90
>25.0	2.00	2.00	2.70

Nominal external diameter mm	Maximum deviation, plus or minus mm
£25.0	0.15
>25.0 £50.0	0.25
>50.0 £75.0	0.30
>75.0 £100.0	0.35
>100.0 £125.0	0.45
>125.0	0.50

Nominal tube length mm	Maximum deviation from straight  mm
1220	8.9
610	2.2