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Advanced Notification of Interruption to Shipping

We are now expecting to move to our new premises in Rugby during the last week in November. During the move, we will not be shipping any orders out for the period Tuesday 25th November to Tuesday 2nd December. Last shipping day will be Monday 24th November and re-commence Wednesday 3rd December. Orders placed after 12 noon GMT on the 24th will be processed from the 3rd December

Machining Services

Whilst our machine shop is re-located, we are unable to carry out machining modifications on gears, sprockets, pulleys etc. Any order placed which includes machining options is unlikely to be processed until mid December.


6mm Steel Chain Sprockets

High quality 6mm British Standard pitch sprockets in the most popular sizes. Sizes we do not stock at technobots are available through our gearsandsprockets website that offers a far greater range of transmission components.

These sprockets are supplied with a pilot bore that can be machined to a larger accurate diameter (subject to boss size) although many users find the pilot bore quite acceptable. Using our 'Custom Machining' service, we can not only bore out these sprockets but also drill and tap for set (grub) screw fixing. See the 'Custom Machining' tab with each product for more information.

Nominal tooth width: 2.8mm
Boss width: 7.5 to 12mm depending on sprocket size

Steel EN8, 080M40/080M46

04B (04-1) Pitch 6mm Bore size is subject to change from table below, if bore size is critical then select 'Custom Bore Size' with bore required when making purchase.
Overall Width 'A'  See Below
Tooth Width 'B1' 2.8mm
Teeth Diameter 'de' PCD Ø 'dp' Boss Ø dm Bore Ø 'D1' Overall Width
Teeth Diameter 'de' PCD Ø 'dp' Boss Ø dm Bore Ø 'D1' Overall Width
8 18 15.67 10 5 10
26 52.1 49.76 30 8 15
9 19.9 17.54 12 5 10
27 54 51.67 30 8 15
10 21.7 19.42 13 6 10
28 55.9 53.58 30 8 15
11 23.6 21.30 14 6 10
29 57.8 55.5 30 8 15
12 25.4 23.18 16 6 10
30 59.8 57.42 30 8 15
13 27.3 25.05 18 8 10
31 61.7 59.31 30 8 15
14 29.2 26.96 20 8 10
32 63.6 61.21 30 8 15
15 31 28.86 20 8 10
33 65.5 63.11 30 8 15
16 33 30.76 20 8 13
34 67.4 65.02 30 8 15
17 35 32.65 20 8 13
35 69.3 66.93 30 8 15
18 36.9 34.55 20 8 13
36 71.2 68.84 30 8 15
19 38.8 36.44 20 8 13
37 73.1 70.75 30 8 15
20 40.7 38.34 20 8 13
38 75 72.66 30 8 15
21 42.6 40.25 25 8 13
40 78.9 76.47 30 8 15
23 46.4 44.06 25 8 13
45 88.5 86.01 40 10 16
24 48.3 45.96 25 8 13
57 111.4 108.93 50 12 20
25 50.2 47.87 25 8 13
76 147.6 145.19 60 12 20

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