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PostPosted: Sun Jan 13, 2019 5:45 pm 
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I have just purchased a Bosch palm router gkf 600
I am trying to route a rebate using a standard square bit. I can control the depth easily but am having difficulty with the roller guide to control the width of the cut. I’m making a box and the width of the end on wood pieces need to match the width of the rebate. So if I am working with half inch material I will need the bit to go in exactly half an inch. The problem is that the guide ball fence will only allow around 5mm of lateral wood removal which seems very odd unless I have set it up incorrectly?? Has anyone had similar problems? Not sure but with a roller will help as the width is fixed

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PostPosted: Sun Jan 13, 2019 9:01 pm 
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heeelllooo and welcome surgeon :welcome: :welcome: :welcome:
you buy bearing off different sizes you will need a 1/4" cutter but here is a 1/2" example
https://www.axminster.co.uk/axcaliber-r ... ngs-506273
or this one with 3 barings
https://www.trenddirectuk.com/tr34x1-4tc
you can also remove the bearing and use the fence to give the correct rebate
also bearings arnt a standard centre so buy the cutter and bearing in the same set or from the same place making sure they fit
https://www.wealdentool.com/acatalog/On ... gs_17.html
https://www.wealdentool.com/cgi-bin/sh0 ... ml#aT1708B

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PostPosted: Mon Jan 14, 2019 1:45 am 
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Surgeon wrote:
So if I am working with half inch material I will need the bit to go in exactly half an inch. The problem is that the guide ball fence will only allow around 5mm of lateral wood removal which seems very odd unless I have set it up incorrectly?? Has anyone had similar problems? Not sure but with a roller will help as the width is fixed

Actually, you are using the wrong fence! The follow bearing fence is designed for laminate trimming and is specifically used with a cutter of the same or smaller diameter than the bearing:
Attachment:
Laminate Trimming with Follow Bearing 001_01.png
Laminate Trimming with Follow Bearing 001_01.png [ 221.64 KiB | Viewed 679 times ]

For anything other than laminate trimming it simply isn't possible to control the cut adequately - and that's also why the "rebate width" is somewhat restricted. For rebating you need to use either a rebate bearing bit:
Attachment:
Rebate Cutter 001_01.gif
Rebate Cutter 001_01.gif [ 7.44 KiB | Viewed 679 times ]

which works well on curved or small work pieces (the diameter of bearing controls the width of the rebate). Or a straight cutter with the straight fence:
Attachment:
Bosch GKF600 Side Fence 001_01.png
Bosch GKF600 Side Fence 001_01.png [ 58.16 KiB | Viewed 679 times ]

For safety's sake the width of the rebate must NEVER be more than 1/2 the diameter of the cutter - so a 5mm wide rebate would require a cutter of >10mm (ideally 12 to 16mm). That is to avoid kickback. Similarly you need to be careful not to overload the router or the cutter by cutting too deeply/heavily.

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