GN 6339

Druk- en afdekschijven

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Omschrijving

1Specification

Steel, 1.7227 (42 CrMoS 4 V)

tempered to tensile strength

Rm = 1220 ... 1400 N/mm2

fine turned and slide ground

blackened BT

GEOMET 500-treated G0

2Information

The influence of a washer on the quality of the screwed connection is very often underestimated. With washers GN 6339, high quality preloaded screwed connections can be established.

A high static clamping force can be reached avoiding loss of tension.

At a specified preloaded clamping force it is often possible to use thinner bolts. This can result in a better ratio between clamping distance and bolt diameter to minimise the danger of failure.

The case hardened smooth bolt head/screw contact face leads to a lower and more constant friction co-efficient even when continuous clamping and releasing operations are required.

Washers GN 6339 are only suitable for machine construction bolts of classes 8.8 / 10.9 / 12.9, and not for steel bolts DIN 6914.

3Technical information
  • ISO-Fundamental Tolerances 
 

Outside diameter d2

The outside diameter d2 of the lower type refers to washers DIN 125 / ISO 7089, and the higher type to washers DIN 7349.

Chamfer face diameter d3

This dimension is, together with the chamfer angle α 70° and the inside diameter d1, the most important dimension of these heavy duty washers. Diameter d3 is actually, even in the lower tolerance range, larger than the max. contact under head diameter on a bolt. This will ensure that the chamfer of d3 of the hardened washer will not be pressed into the underhead radius causing an indentation on the bolt which would damage the bolt.

Inside diameter d1

The inside diameter d1 is kept as small as possible ensuring that the bolt is inserted centrically into the washer. The choice of a matching pair of bolt and washer with least radial clearance is important in order to avoid a mismatch between chamfer diameter d3 and the max. contact area diameter of the bolt head.

Chamfer angle α = 70° ± 2°

This relatively large angle is necessary when using hexagon headed bolts, which usually have a tapered transfer from shank to head (the so-called trumpet) to avoid fouling of the washer.

Chamfer edge F

The extended chamfer side F as seen from d3 creates with d1 an edge the so-called trumpet of the transfer from shank to head of the bolt, so that the smallest radial clearance prevails. Even with the smallest angle of 680 and the lower dimension of d3 and d1 the radial clearance of all bolts to DIN EN is still sufficient.

Lead height h

This is the height of the cylindrical part of the internal diameter d1, h should be as high as possible in relation to the pitch of the thread of the bolt.

Washer thickness s

Washers GN 6339 are higher when compared with DIN washers (exception: DIN 7439 which is equal to the high type).A larger thickness leads to a stronger washer. As a result, bearing in mind the chamfer d3, a minimum height is established which ensures that the bolt thread will not be damaged when the bolt is tightened.

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Code

Omschrijving

Aantal

Prijs

Bestel

CAD

d2 h13 laag type

f laag type

d1 H13

s laag type

Gewicht (g)

d2 h13 hoog type

f hoog type

s Hoog type

voor draadbout

d3 H13

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100981711 GN 6339-10,4-20-3-BT
€ 1,94
20 0.75 10.4 3 5 N.v.t. N.v.t. N.v.t. M 10 11.5
100981713 GN 6339-10,4-20-3-GO
€ 2,11
20 0.75 10.4 3 5 N.v.t. N.v.t. N.v.t. M 10 11.5
100981714 GN 6339-10,4-25-4-BT
€ 3,01
N.v.t. N.v.t. 10.4 N.v.t. 12 25 1.5 4 M 10 11.5
100981709 GN 6339-10,4-25-4-GO
€ 3,20
N.v.t. N.v.t. 10.4 N.v.t. 12 25 1.5 4 M 10 11.5
100981703 GN 6339-12,5-24-3,5-BT
€ 1,98
24 1 12.5 3.5 8 N.v.t. N.v.t. N.v.t. M12 14
100981705 GN 6339-12,5-24-3,5-GO
€ 2,14
24 1 12.5 3.5 9 N.v.t. N.v.t. N.v.t. M12 14
100981701 GN 6339-12,5-30-6-BT
€ 3,55
N.v.t. N.v.t. 12.5 N.v.t. 26 30 2 6 M12 14
100981707 GN 6339-12,5-30-6-GO
€ 3,75
N.v.t. N.v.t. 12.5 N.v.t. 26 30 2 6 M12 14
100981720 GN 6339-14,5-28-3,5-BT
€ 2,38
28 1 14.5 3.5 12 N.v.t. N.v.t. N.v.t. M 14 16
100981722 GN 6339-14,5-28-3,5-GO
€ 2,53
28 1 14.5 3.5 12 N.v.t. N.v.t. N.v.t. M 14 16
100981723 GN 6339-14,5-36-6-BT
€ 4,34
N.v.t. N.v.t. 14.5 N.v.t. 38 36 2 6 M 14 16
100981725 GN 6339-14,5-36-6-GO
€ 4,53
N.v.t. N.v.t. 14.5 N.v.t. 38 36 2 6 M 14 16
100981702 GN 6339-16,5-30-4-BT
€ 2,77
30 1 16.5 4 15 N.v.t. N.v.t. N.v.t. M 16 18
100981727 GN 6339-16,5-30-4-GO
€ 2,96
30 1 16.5 4 15 N.v.t. N.v.t. N.v.t. M 16 18
100981728 GN 6339-16,5-40-6-BT
€ 4,93
N.v.t. N.v.t. 16.5 N.v.t. 47 40 2 6 M 16 18
100981730 GN 6339-16,5-40-6-GO
€ 5,12
N.v.t. N.v.t. 16.5 N.v.t. 47 40 2 6 M 16 18
100981731 GN 6339-18,5-34-5-BT
€ 3,16
34 1.5 18.5 5 23 N.v.t. N.v.t. N.v.t. M 18 21
100981733 GN 6339-18,5-34-5-GO
€ 3,36
34 1.5 18.5 5 23 N.v.t. N.v.t. N.v.t. M 18 21
100981734 GN 6339-18,5-44-8-BT
€ 5,91
N.v.t. N.v.t. 18.5 N.v.t. 74 44 2.5 8 M 18 21
100981736 GN 6339-18,5-44-8-GO
€ 6,32
N.v.t. N.v.t. 18.5 N.v.t. 74 44 2.5 8 M 18 21
100981737 GN 6339-20,5-37-5-BT
€ 3,55
37 1.5 20.5 5 27 N.v.t. N.v.t. N.v.t. M 20 23
100981739 GN 6339-20,5-37-5-GO
€ 3,79
37 1.5 20.5 5 22 N.v.t. N.v.t. N.v.t. M 20 23
100981740 GN 6339-20,5-44-8-BT
€ 5,91
N.v.t. N.v.t. 20.5 N.v.t. 71 44 2.5 8 M 20 23
100981742 GN 6339-20,5-44-8-GO
€ 6,32
N.v.t. N.v.t. 20.5 N.v.t. 71 44 2.5 8 M 20 23
100981743 GN 6339-22,5-40-5-BT
€ 3,75
40 1.5 22.5 5 31 N.v.t. N.v.t. N.v.t. M 22 25
100981745 GN 6339-22,5-40-5-GO
€ 4,14
40 1.5 22.5 5 31 N.v.t. N.v.t. N.v.t. M 22 25
100981746 GN 6339-22,5-50-8-BT
€ 8,68
N.v.t. N.v.t. 22.5 N.v.t. 93 50 2.5 8 M 22 25
100981748 GN 6339-22,5-50-8-GO
€ 9,46
N.v.t. N.v.t. 22.5 N.v.t. 93 50 2.5 8 M 22 25
100981700 GN 6339-24,5-44-5-BT
€ 4,62
44 1.5 24.5 5 39 N.v.t. N.v.t. N.v.t. M 24 27
100981750 GN 6339-24,5-44-5-GO
€ 4,73
44 1.5 24.5 5 39 N.v.t. N.v.t. N.v.t. M 24 27
100981751 GN 6339-24,5-50-10-BT
€ 10,25
N.v.t. N.v.t. 24.5 N.v.t. 100 50 3.5 10 M 24 27
100981753 GN 6339-24,5-50-10-GO
€ 12,23
N.v.t. N.v.t. 24.5 N.v.t. 108 50 3.5 10 M 24 27
100981754 GN 6339-28-50-6-BT
€ 7,11
50 1.5 28 6 60 N.v.t. N.v.t. N.v.t. M 27 31
100981756 GN 6339-28-50-6-GO
€ 7,72
50 1.5 28 6 60 N.v.t. N.v.t. N.v.t. M 27 31
100981757 GN 6339-28-60-10-BT
€ 13,82
N.v.t. N.v.t. 28 N.v.t. 161 60 3.5 10 M 27 31
100981759 GN 6339-28-60-10-GO
€ 15,83
N.v.t. N.v.t. 28 N.v.t. 161 60 3.5 10 M 27 31
100981760 GN 6339-31-56-6-BT
€ 9,07
56 1.5 31 6 77 N.v.t. N.v.t. N.v.t. M 30 34
100981762 GN 6339-31-56-6-GO
€ 10,25
56 1.5 31 6 77 N.v.t. N.v.t. N.v.t. M 30 34
100981763 GN 6339-31-68-10-BT
€ 15,81
N.v.t. N.v.t. 31 N.v.t. 215 68 3.5 10 M 30 34
100981765 GN 6339-31-68-10-GO
€ 18,16
N.v.t. N.v.t. 31 N.v.t. 214 68 3.5 10 M 30 34
100981766 GN 6339-37-66-7-BT
€ 9,85
66 2 37 7 122 N.v.t. N.v.t. N.v.t. M 36 40
100981768 GN 6339-37-66-7-GO
€ 11,49
66 2 37 7 122 N.v.t. N.v.t. N.v.t. M 36 40
100981769 GN 6339-6,3-12-2,5-BT
€ 1,96
12 0.6 6.3 2.5 2 N.v.t. N.v.t. N.v.t. M 6 7
100981771 GN 6339-6,3-12-2,5-GO
€ 2,31
12 0.6 6.3 2.5 2 N.v.t. N.v.t. N.v.t. M 6 7
100981772 GN 6339-6,3-17-3-BT
€ 2,38
N.v.t. N.v.t. 6.3 N.v.t. 2 17 1 3 M 6 7
100981774 GN 6339-6,3-17-3-GO
€ 2,70
N.v.t. N.v.t. 6.3 N.v.t. 2 17 1 3 M 6 7
100981775 GN 6339-8,4-16-2,5-BT
€ 1,90
16 0.75 8.4 2.5 3 N.v.t. N.v.t. N.v.t. M 8 9.5
100981777 GN 6339-8,4-16-2,5-GO
€ 2,31
16 0.75 8.4 2.5 3 N.v.t. N.v.t. N.v.t. M 8 9.5
100981778 GN 6339-8,4-21-4-BT
€ 2,38
N.v.t. N.v.t. 8.4 N.v.t. 8 21 1.5 4 M 8 9.5
100981780 GN 6339-8,4-21-4-GO
€ 2,70
N.v.t. N.v.t. 8.4 N.v.t. 8 21 1.5 4 M 8 9.5