Leader in machined plastics and resin bonded fabrics Engineering plastics and composites

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

Maximum deviation from nominal internal diameter:

 

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

Tolerance on wall thickness:

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

Maximum deviation from nominal external diameter (in the ground or turned condition).

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

Tolerance on Straightness:

Nominal tube length mm

Maximum deviation from straight  mm

1220

8.9

610

2.2