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The Regrind Box standard: any brand, back sharp in 14 business days. Get your free box. Run your numbers →
The Regrind Box standard: any brand, back sharp in 14 business days. Get your free box. Run your numbers →
EM-516431250SQ carbide end mill | Star Tool Inc

5/16" x 4 Fl x 3" OAL x 1-1/4" LOC w/ Square Corner | Carbide End Mill

$50.40 - $50.40
$50.40
$50.40 - $50.40
$50.40
SKU EM-516431250SQ
Ø 5/16″4 FL3.00″ OAL1.250″ LOCSQUNCOATED
Availability:
3 in stock, ready to be shipped

Dull isn't dead.

This end mill sharpens for $13.25, off the same published sheet every regrind we run rides. When it dulls, it doesn't owe you another $50. It owes you a trip back to Wichita.

Do that 3 times (3 is the conservative count) and one purchase turns into 4 sharp tools for $90.15, instead of $201.60 buying new every time. That's 55% off the life of the tool.

Drop it in a Regrind Box with the rest of your dull tools. You give the go-ahead, the clock starts: sharp tools back within 14 business days. That's the Regrind Box standard.

All-in: cut-off of damaged ends, end type, flute count, all in the one price. And any brand rides the same sheet, not just ours.

Get a Regrind Box Regrind pricing →
lives left in it
REGRIND MATH: THIS TOOL
New, off the shelf$50.40
Sharpen: Ø 5/16″ end mill$13.25
Back in your spindle$13.25
OVER ITS LIFE: 3 REGRINDS, THE CONSERVATIVE COUNT
4 sharp tools, buying new every time$201.60
4 sharp tools, this one reground ×3$90.15
Stays in your shop: 55% saved$111.45
PULLED FROM THIS TOOL'S SPECS · PUBLISHED RATES · STANDARD TOOLS · MOST TOOLS REGRIND 3–5×. WE COUNT 3

Almost the right tool? We grind the exact one.

Different radius, longer flutes, a step, a tolerance the catalog won't hold: if this tool is close but not quite, don't shim the job to fit the tool. Send a print. Or a sketch. Or the worn-out tool you've been babying. Ground here in Wichita, and one tool is a real order.

A Star Tool special isn't disposable, either: it goes on file, so reorders are a PO number, and it comes back through the same Regrind Box as everything else, with its regrind price quoted up front, on the original quote.

Send a print How custom works →
one tool = a real order
THIS TOOL, YOUR WAY
Ø 5/16″→your diameter
4 FL→your flute count
1.250″ LOC→your length of cut
SQ→your corner
UNCOATED→your coating
Ground to your print, in Wichitaon file ✓