Hi, WIS 16 shortcut for info for others http://www.hse.gov.uk/pubns/wis16.pdf Looked on line too, lots of pictures but few suppliers. You probably have done so, but if not, have you tried the machine supplier? These guys may have them, or know where to get them from: Scott+Sargeant Woodworking Machinery, 1 Blatchford Rd, Horsham, Near London RH13 5QR ENGLAND Mon-Fri 8am-5pm +44 (0)1403 273000 sales@scosarg.co.uk Not a lot of help! sorry. S

I note that Segwick planer-thicknessers have them - ask them? http://sedgwick-machinery.co.uk/?page_id=86

I have one of these on my Table Saw http://www.axminster.co....le-dust-extraction-guard

Now I do a LOT with machinery and wood machinery. I would never recommend grooving or rebating on a TS as per Walker. In fact in nearly 10 years I've never seen Shaw guards on a TS. It's not the best device for rebating, it can be used, but there are more cost effective options, especially once you factor in the Shaw guards. When I saw the title, I immediately thought Spindle Moulder, as this is where I would normally encounter Shaw guards. The Blythe link above is for Spindle Moulder Shaw guards. To rebate on a Planer / Thicknesser would necessitate the cutter ends being inside the table width or overhanging the table with the work, then you need to consider the work support. After this you need to consider the depth of rebate & how you could accomplish that with a cutter which meets the requirements of the relevant wood tooling standards for cutter projection and limiters (secondary). How you could get a reasonable projection of the cutter above the surface of the table and still retain sufficient clamping on the planer knife. The PT255 can rebate up to 13mm with a 25mm knife, however, the width of rebate I'm not sure about. IMHO a modern Pl/Th is not the correct machine to rebate on. Look at it from a production point of view. (random numbers follow) To make a 25mm sq rebate in 100mm x 150mm timber will take 2 set ups and 2 passes on a table saw. The surface finish on the rebate will not be brilliant, sawn, so could require further processing. On a spindle moulder it will be one set up and the finish will be MUCH better, and it is doubtful it will require further processing.