Ron Seto
Plastic
- Joined
- Jan 26, 2001
- Location
- Ocean Springs, Ms
Is there an application where a single ended end mill would be used over a double ended end mill and visa versa?
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End mills
- Thread starter Ron Seto
- Start date
- Replies 4
- Views 1,414
Forrest Addy
Diamond
- Joined
- Dec 20, 2000
- Location
- Bremerton WA USA
Single ended end mills are usually a little longer in the cut length and available in a wide range of styles and grinds. Double ended are more economical and that's about it. Choose accordingly.
D
D. Thomas
Guest
I've had a few end mill holders that didn't have deep enough bores for a double end mill, but usually that's not a problem.
JR in TX
Aluminum
- Joined
- Jan 22, 2001
- Location
- Copperas Cove, TX
Another question answered I always wondered about thank you.
Bawko Bawkorian
Aluminum
- Joined
- Jan 8, 2001
- Location
- Salt Lake City, Utah, USA
Greetings!
One other thing that single ended endmills are good for which can't be done with a double ended endmill is to countersink holes for caphead bolt heads, splinehead bolts, etc.
First, you use your drill chuck to drill the hole for the threaded part of the caphead bolt to slide through, then you pick a single ended endmill that is larger than the caphead bolt head.
You then put the endmill you've selected into the drill chuck and use it to create the cavity for the capscrew head to fit into, by cutting vertically into the hole you've just drilled. Since it will be cutting on the outer edges of the flutes, it will cut with minimum vibration and side loading.
This is an operation that you can't do with a double ended endmill, as the other set of flutes will mess up your drill chuck fingers and is usually too long anyway. For this operation, the shorter the endmill the better, the stub length endmills with short shanks are the best.
Warning - NEVER endmill sideways with an endmill in a drill chuck, it messes up the chuck runout. ONLY cut vertically in line with the spindle axis, and ONLY if you have a pre-drilled hole so the center of the endmill will not contact the workpiece causing "wobble" vibrations and the resulting side load deflection.
Best regards,
Bawko
One other thing that single ended endmills are good for which can't be done with a double ended endmill is to countersink holes for caphead bolt heads, splinehead bolts, etc.
First, you use your drill chuck to drill the hole for the threaded part of the caphead bolt to slide through, then you pick a single ended endmill that is larger than the caphead bolt head.
You then put the endmill you've selected into the drill chuck and use it to create the cavity for the capscrew head to fit into, by cutting vertically into the hole you've just drilled. Since it will be cutting on the outer edges of the flutes, it will cut with minimum vibration and side loading.
This is an operation that you can't do with a double ended endmill, as the other set of flutes will mess up your drill chuck fingers and is usually too long anyway. For this operation, the shorter the endmill the better, the stub length endmills with short shanks are the best.
Warning - NEVER endmill sideways with an endmill in a drill chuck, it messes up the chuck runout. ONLY cut vertically in line with the spindle axis, and ONLY if you have a pre-drilled hole so the center of the endmill will not contact the workpiece causing "wobble" vibrations and the resulting side load deflection.
Best regards,
Bawko
