Jashley73
Titanium
- Joined
- Jan 24, 2013
- Location
- Louisville, KY
I have a customer that is drilling some material called "Caldie" from Boehler Uddeholm.
UDDEHOLM CALDIE | Bohler Uddeholm
I spoke with Boehler about this material several weeks ago, and was told that it's "close to S7".
.7% Carbon
.2% Silicon
.5% Manganese
5.% Chrome
2.3% Molybdenum
.5% Vanadium
Harden-able to 60hrc. Supplied in annealed (215hb) condition.
The customer insists that it's like cutting a "tougher D2" however, their drilling chips don't look like that of D2. In my experience, D2 will produce chips from drilling much like brass - very short, fragmented & broken. The customer's chips in the Cal-Die material are short, and nicely formed & broken, as typical of a H.P. carbide drill in alloy steels.
The spec sheet for this "Cal-Die" material also looks very similar to S7 in chemical composition, and also in regards to hardness vs. toughness characteristics. Not to mention D2 typically has 1.5% carbon & 12-12.5% chrome, and this Caldie material is only 5% chrome.
My customer has to drill several holes 22mm diameter, up to say 6"/150mm in length. Machine is a DMG-Mori NVX5100, less than 1 year old. 15k spindle, 40-taper, with TSC. For shorter holes, they're able to use a short indexable drill, but a 5xD indexable drill will not stabilize on entry, produces a terrible hole quality, and chips the inserts after one hole. (Presumably after initial contact/entry...) The have tried spotting with a matching 2-3xD indexable drill, and milling a counterbore with an endmill, which they claim makes no difference.
They're hesitant to try a Seco crown-loc drill, because of fears over the connection... Lately, they've tried a Guhring replaceable-tip drill from my competitor. They're running that drill slow (350rpm for carbide) and experienced a few holes before chipping/cracking the insert and slightly deforming the cutter body.
Emphasis is on security against broken drills/tips. I'm getting ready to recommend an Allied spade-drill with cobalt inserts because of the toughness of the cobalt insert. This is right in that awkward size/depth range, where indexable's won't work because of the length, and it's too big in diameter for solid carbide drills. So replaceable-tip drills seem to be the only way to go.
I'm looking for people who have worked with this Caldie material, or even S7 at this point.
What kind of replaceable-tip drills have you had success with drilling these materials?
Just FYI - I'm a distributor for Walter, Seco, Allied, Kyocera, OSG, and Dormer. So any direct experience with these lines would be an even bigger plus...
UDDEHOLM CALDIE | Bohler Uddeholm
I spoke with Boehler about this material several weeks ago, and was told that it's "close to S7".
.7% Carbon
.2% Silicon
.5% Manganese
5.% Chrome
2.3% Molybdenum
.5% Vanadium
Harden-able to 60hrc. Supplied in annealed (215hb) condition.
The customer insists that it's like cutting a "tougher D2" however, their drilling chips don't look like that of D2. In my experience, D2 will produce chips from drilling much like brass - very short, fragmented & broken. The customer's chips in the Cal-Die material are short, and nicely formed & broken, as typical of a H.P. carbide drill in alloy steels.
The spec sheet for this "Cal-Die" material also looks very similar to S7 in chemical composition, and also in regards to hardness vs. toughness characteristics. Not to mention D2 typically has 1.5% carbon & 12-12.5% chrome, and this Caldie material is only 5% chrome.
My customer has to drill several holes 22mm diameter, up to say 6"/150mm in length. Machine is a DMG-Mori NVX5100, less than 1 year old. 15k spindle, 40-taper, with TSC. For shorter holes, they're able to use a short indexable drill, but a 5xD indexable drill will not stabilize on entry, produces a terrible hole quality, and chips the inserts after one hole. (Presumably after initial contact/entry...) The have tried spotting with a matching 2-3xD indexable drill, and milling a counterbore with an endmill, which they claim makes no difference.
They're hesitant to try a Seco crown-loc drill, because of fears over the connection... Lately, they've tried a Guhring replaceable-tip drill from my competitor. They're running that drill slow (350rpm for carbide) and experienced a few holes before chipping/cracking the insert and slightly deforming the cutter body.
Emphasis is on security against broken drills/tips. I'm getting ready to recommend an Allied spade-drill with cobalt inserts because of the toughness of the cobalt insert. This is right in that awkward size/depth range, where indexable's won't work because of the length, and it's too big in diameter for solid carbide drills. So replaceable-tip drills seem to be the only way to go.
I'm looking for people who have worked with this Caldie material, or even S7 at this point.
What kind of replaceable-tip drills have you had success with drilling these materials?
Just FYI - I'm a distributor for Walter, Seco, Allied, Kyocera, OSG, and Dormer. So any direct experience with these lines would be an even bigger plus...