02-28-2016, 05:53 AM
The last time I was in the US (2014), Ken took me to meet Russ and I got a tour of his very well equiped and very capable family run machine shop. To my surprise, we returned the next day and Russ gifted me a box of tooling that he no longer wanted. In that box was an Iscar SGTBU 25.4-5G parting blade block and two dual end blades and inserts.
As I had a Valenite VGTB 16-25 block already, I put this aside for a friend. Yesterday I found it hiding at the back of one of my cupboards and today I machined .500" off of it, so that it will fit my friend's QCTP, which accepts 1/2" shank tooling.
This was the perfect job for my Walter F4042R.UB13.038.Z06.10 shoulder mill. As I didn't know what material or hardness it was, I ran the face mill at 970 rpm and took a .050" cut. It cut effortlessly, so I continued with that speed and DOC. I climb-milled, and the chips came of straw coloured and turned blue/purple by the time they landed. I took a .025" finish cut, increasing the feed and got a very nice finish.
First pass - you can just see the scribe line that is my visual cue to stop.
All finished.
I'm probably going to have to remove some of the width, as I want to keep the bulk of the block against the tool holder. I just want to check the actual depth of the slot. I assume it is 1/2" but I want to check first. I also need to ensure that the blade clamp will not foul the tool holder if I narrow the width too much. I left that at my other shop though...
I guess now he should label it SGTBU 12.7-5G
As I had a Valenite VGTB 16-25 block already, I put this aside for a friend. Yesterday I found it hiding at the back of one of my cupboards and today I machined .500" off of it, so that it will fit my friend's QCTP, which accepts 1/2" shank tooling.
This was the perfect job for my Walter F4042R.UB13.038.Z06.10 shoulder mill. As I didn't know what material or hardness it was, I ran the face mill at 970 rpm and took a .050" cut. It cut effortlessly, so I continued with that speed and DOC. I climb-milled, and the chips came of straw coloured and turned blue/purple by the time they landed. I took a .025" finish cut, increasing the feed and got a very nice finish.
First pass - you can just see the scribe line that is my visual cue to stop.
All finished.
I'm probably going to have to remove some of the width, as I want to keep the bulk of the block against the tool holder. I just want to check the actual depth of the slot. I assume it is 1/2" but I want to check first. I also need to ensure that the blade clamp will not foul the tool holder if I narrow the width too much. I left that at my other shop though...
I guess now he should label it SGTBU 12.7-5G
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