IMCO - 2017 Comprehensive End Mill Catalog
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Technical Resources<br />
Tool Holder Recommendations When Using HEM<br />
HEM tool paths reduce the amount of radial cutting forces exerted on<br />
the end mill, allowing more aggresive speeds and feeds and higher<br />
metal removal rates (MRR). Along with higher MRRs come higher<br />
axial cutting forces, which work to pull the end mill out of the holder<br />
and into the part. Using a holder with gripping power high enough<br />
to overcome these increased axial forces is critical for successful<br />
machining in HEM tool paths. For better tool life, it is also important<br />
to choose a holder that minimizes the run-out of the tool assembly.<br />
Holder Type<br />
Press fit<br />
Shrink fit<br />
Mechanical chuck<br />
Hydraulic chuck<br />
Advanced ER collet<br />
Standard ER collet<br />
Side lock holder<br />
Use in HEM Programming?<br />
Recommended<br />
Recommended<br />
Recommended<br />
Only if ADOC < 3 x D<br />
Only if ADOC < 3 x D<br />
Not recommended<br />
MUST keep run-out<br />
minimized<br />
Determining Power Requirements<br />
It can be helpful to understand the power<br />
requirements for an application. The following<br />
formulas calculate spindle and motor<br />
horsepower and spindle torque.<br />
Step 1: Metal Removal Rate (MRR) =<br />
(Tool Feed Rate) x Radial DOC x Axial DOC<br />
Step 2: Spindle HP = Metal Removal Rate x UHP<br />
Step 3: Motor HP = Spindle HP / Efficiency<br />
Step 4: Spindle Torque (ft. lbs.) =<br />
(Spindle HP x 63,030) / RPM<br />
UHP Factors Ratings<br />
Material<br />
Factor<br />
Aluminum 0.3<br />
Cast iron 0.8<br />
Carbon steel 1<br />
Alloy steel 1.1<br />
Mold steel 1.2<br />
Tool steel 1.2<br />
Stainless steel 1.5<br />
Titanium 1.8<br />
Hi-temp alloys 2<br />
Efficiency Ratings<br />
Spindle Type %<br />
Direct drive 90%<br />
Gear drive 85%<br />
2 Belt 70%<br />
1 Belt 50%<br />
Average 80%<br />
Tool Renewal Services<br />
Resharpen. Restore. Recharge. Get the most out of your tooling investment by using <strong>IMCO</strong>’s reconditioning services.<br />
Reconditioning is a cost-effective way to increase the life span and value of your <strong>IMCO</strong> end mills.<br />
• No quantity limit<br />
• Two- to three-week turnaround upon order confirmation (coating included) on most tools<br />
• Original coating put back on all <strong>IMCO</strong> end mills<br />
Contact us with questions or for a quote for our<br />
resharpening services at regrinds@imcousa.com.<br />
You can also find our order form on our website<br />
at imcousa.com/resources/catalog.<br />
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