Hello
I have a job coming up that involves drilling a 7/8 inch hole about 9” deep in delrin on a engine lathe. The last company that did this wound up shattering the delrin while drilling and blowing a hole through the ceiling of his shop. He said that the drill grabs the material too aggressively and gets sucked in. I was not able to get any more details on his set up. While drilling some simple parts on a drill press I had it bite so hard it sucked the part and the vice up off the table. I found that using a spade bit for wood from the hardware store worked very well and did not grab the material like a twist drill did.
I want to avoid all of these problems. Can you recommend a drill for this 7/8” hole 9” deep? Do I need to re grind the drill? I can drill from both ends but would prefer doing it in one shot.
Thanks
I have a job coming up that involves drilling a 7/8 inch hole about 9” deep in delrin on a engine lathe. The last company that did this wound up shattering the delrin while drilling and blowing a hole through the ceiling of his shop. He said that the drill grabs the material too aggressively and gets sucked in. I was not able to get any more details on his set up. While drilling some simple parts on a drill press I had it bite so hard it sucked the part and the vice up off the table. I found that using a spade bit for wood from the hardware store worked very well and did not grab the material like a twist drill did.
I want to avoid all of these problems. Can you recommend a drill for this 7/8” hole 9” deep? Do I need to re grind the drill? I can drill from both ends but would prefer doing it in one shot.
Thanks