Hi Guys & Gals!
I have a question regarding the Stihl USG chain grinder. As far as I know, the markings for the side plate angle (referred to in the manual as the A-scale) show the zero degree setting at the top, i.e. the 12 o'clock position, or when the wheel is vertical. This setup is different from the Jolly/Tecomec/Oregon grinders, which have the 90 degree setting at the 12 o'clock position. Am I thus correct in assuming that in order to get a side plate angle of 60 degrees on the USG, that it has to be set at 30 degrees?
On the Oregon, it's as simple as setting the scale to 60 degrees.
The reason for my question is that I have a friend who has the USG, and has recently added a CBN wheel to his grinder collection. He called me to say that his CBN wheel is contacting his depth gauges on the way down, so I suggested to him that he set the A-scale to 30 degrees (90-30=60). He is hesitant to set it at 30 degrees, because the manual stipulates a 40 degree setting. This just does not seem right to me. Could someone clear this up for me please? Surely the 40 degrees in the manual results in a 50 degree side plate angle. This is waaaay too acute... especially considering Stihl calls for a 60 deg angle on the RS chain, and even steeper 75 to 80 deg on the RM and Duro chains...
Regards,
Mike
I have a question regarding the Stihl USG chain grinder. As far as I know, the markings for the side plate angle (referred to in the manual as the A-scale) show the zero degree setting at the top, i.e. the 12 o'clock position, or when the wheel is vertical. This setup is different from the Jolly/Tecomec/Oregon grinders, which have the 90 degree setting at the 12 o'clock position. Am I thus correct in assuming that in order to get a side plate angle of 60 degrees on the USG, that it has to be set at 30 degrees?
On the Oregon, it's as simple as setting the scale to 60 degrees.
The reason for my question is that I have a friend who has the USG, and has recently added a CBN wheel to his grinder collection. He called me to say that his CBN wheel is contacting his depth gauges on the way down, so I suggested to him that he set the A-scale to 30 degrees (90-30=60). He is hesitant to set it at 30 degrees, because the manual stipulates a 40 degree setting. This just does not seem right to me. Could someone clear this up for me please? Surely the 40 degrees in the manual results in a 50 degree side plate angle. This is waaaay too acute... especially considering Stihl calls for a 60 deg angle on the RS chain, and even steeper 75 to 80 deg on the RM and Duro chains...
Regards,
Mike