Thanks for this very valuable information, Even! As I was unaware of the 35 degree angle limitation, I had pretty much decided I would buy an 80 grit CBN wheel for sharpening planer blades. I didn't understand the difference between 'ordinary carbon steel' and 'HSS', but having now read the information on the 'SB-250 Tormek Blackstone' page of the Tormek site (https://www.tormek.com/uk/en/accessories/grinding-wheels/sb-250-tormek-blackstone-silicon/), I see that the blackstone is recommended specifically for the shaping of HSS planer blades and woodturning skews.
From what I have read on this forum, there are at least a few people who have been disappointed with their purchase of the Tormek SVH-320 planer jig. I am a hobby woodworker, so it was difficult for me to justify the price of the planer jig. Ultimately, I guesstimated the payback period by weighing the cost of the jig against the cost of having the blades sharpened professionally. (In the interest of complete transparency: I am also considering the possibility of offering sharpening services as a sideline business.) Had the Tormek website (https://www.tormek.com/uk/en/grinding-jigs/svh-320-planer-blade-attachment/) stated something along the lines of 'the Tormek Silicon Blackstone wheel will be needed to obtain reasonably quick sharpening of badly damaged planer blades', I would have factored in the cost of the additional wheel when making my calculation. I believe Tormek is likely a company that makes the bulk of its sales to repeat customers, i.e. those who already have the machine and come back time and time again to buy accessories and consumables. If this is true, it is essential that Tormek not only present its products commercially (i.e. in a manner designed to convince potential customers to buy them) but also with maximum transparency (i.e. providing complete and detailed information to help customers determine whether a product will meet their needs and, most importantly, to prevent disappointment (which may turn off loyal customers to Tormek as a company).
I work with a lot of used wood, which despite my best efforts occasionally contains nails or broken off screw tips. Damaged planer blades and saw blades have been a fact of life for me. I guess it's time I invest in one of those handheld metal detectors that I've read about elsewhere here on the forum.
Ben
From what I have read on this forum, there are at least a few people who have been disappointed with their purchase of the Tormek SVH-320 planer jig. I am a hobby woodworker, so it was difficult for me to justify the price of the planer jig. Ultimately, I guesstimated the payback period by weighing the cost of the jig against the cost of having the blades sharpened professionally. (In the interest of complete transparency: I am also considering the possibility of offering sharpening services as a sideline business.) Had the Tormek website (https://www.tormek.com/uk/en/grinding-jigs/svh-320-planer-blade-attachment/) stated something along the lines of 'the Tormek Silicon Blackstone wheel will be needed to obtain reasonably quick sharpening of badly damaged planer blades', I would have factored in the cost of the additional wheel when making my calculation. I believe Tormek is likely a company that makes the bulk of its sales to repeat customers, i.e. those who already have the machine and come back time and time again to buy accessories and consumables. If this is true, it is essential that Tormek not only present its products commercially (i.e. in a manner designed to convince potential customers to buy them) but also with maximum transparency (i.e. providing complete and detailed information to help customers determine whether a product will meet their needs and, most importantly, to prevent disappointment (which may turn off loyal customers to Tormek as a company).
I work with a lot of used wood, which despite my best efforts occasionally contains nails or broken off screw tips. Damaged planer blades and saw blades have been a fact of life for me. I guess it's time I invest in one of those handheld metal detectors that I've read about elsewhere here on the forum.
Ben