I used to think the best way to save money on tooling was to negotiate a lower unit price. I'd spend weeks pushing for a 2% discount on our sandvik coromant products order, feeling like I'd won something. Then I looked at the actual consumption data—our per-part cost hadn't budged. That's when I realized I'd been optimizing the wrong metric.
Here's a 5-step checklist I now run every quarter. It's for anyone who buys sandvik coromant turning inserts or manages inventory for CNC operations—especially if you're dealing with extra large part horizontal cnc machining where tool wear is unpredictable. It's not about theory. It's about actionable checks. Let's go.
Step 1: Map Your 'Real' Inventory (Not the ERP Report)
The first mistake is trusting the system. Our ERP said we had 240 units of a specific turning insert grade. I walked the floor. We had 87. The discrepancy? Work-in-progress, unofficial stashes at operator stations, and a batch we'd returned three months ago that no one updated.
What to do: Physically count everything. Every drawer, every machine-side cabinet, every forgotten box in the back. Do this for your top 10 SKUs by spend. On an extra large part horizontal cnc machining setup, an operator might hold 15-20 inserts in their personal drawer 'just in case.' That's money sitting idle.
Checkpoint: Your physical count should match your system within 5%. If it doesn't, your reorder point is wrong. You're either overstocking or running out. Both cost money.
Step 2: Separate Consumption from Hoarding
This is the step most people ignore. In 2024, I reviewed 200+ unique items across three plants. One pattern kept emerging: a purchasing manager would see 'Q1 consumption: 500 inserts' and reorder 500. But 150 of those 'consumed' inserts were still in a drawer, not cutting metal. They were just 'consumed' on paper when issued from the central store.
The fix: Create a simple tracking sheet for actual tool usage per machine per shift. For three weeks, have operators note which insert they loaded and when they changed it. It's a pain. But the data is gold.
I ran a blind test with our production team: same sandvik coromant turning inserts on two identical machines, one tracked by weight of chips removed, one by 'feel.' The tracked machine used 18% fewer inserts because we caught a coolant flow issue early. Untracked? They just swapped inserts and blamed the material.
Real talk: If you're not measuring actual cutting time per edge, you're guessing. And the vendor loves it when you guess.
Step 3: Classify Your Tooling by Failure Mode
Not all tool wear is equal. When you pull a used insert from a tool holder, ask: Why is it being replaced?
- Flank wear: Normal. Expected life achieved.
- Crater wear: Chemical reaction with the work material. Maybe needs a different coating grade.
- Chipping: Mechanical shock. Feeds too aggressive, or interruption in cut.
- Built-up edge: Sticky material. Speed too low or wrong chipbreaker.
- Thermal cracking: Coolant inconsistent or interrupted cut cycles.
Ignore the average. If 60% of your insert failures are chipping, you don't need cheaper inserts. You need a process change. I once rejected a batch of 8,000 sandvik coromant turning inserts that had a visually off edge prep. Normal tolerance is ±0.03mm on the honing radius. This batch was at ±0.08mm. The vendor claimed it was 'within industry standard.' We rejected it. Every contract now includes a specific edge prep requirement.
Action: For each of your top 5 part numbers, categorize the last 50 failures. If more than 30% are 'premature' (anything other than flank wear), you have a process problem, not a tooling problem.
Step 4: Challenge the 'Standard' Part Number
This is controversial. Most engineers pick a sandvik coromant turning insert grade because 'that's what we've always used.' Or because the application engineer recommended a specific grade six years ago. Materials change. Speeds evolve. Your 'standard' might be outdated.
I compared two identical jobs: Job A with an existing 'standard' coated carbide grade, and Job B with a newer PVD-coated grade designed for high-temperature alloys. Same part, same machine, same operator. Job B produced 40% more parts per edge on the roughing pass. The newer grade cost 22% more per insert. On a 50,000-unit annual order, we saved $14,000 in tooling costs. The upgrade was a no-brainer.
When to do this: When you see a failure mode pattern shift, or when your supplier releases a new grade guide. Sandvik Coromant updates their product catalog every year. Check it. Request a sample.
But: Don't change everything at once. Test one grade, one operation, for one month. Measure. Compare.
Step 5: Audit the 'Hidden' Costs in Your Order
The unit price is the tip of the iceberg. Here's what I've learned to look for after a $22,000 redo that delayed our launch by two weeks:
- Minimum order quantities (MOQs): Are you ordering 50 inserts because the MOQ is 50, but you only need 20? That's 30 dead inserts in inventory. I've seen warehouses with $60,000 in obsolete sandvik coromant products because someone hit the MOQ button.
- Shipping surcharges: Heavy tooling orders for extra large part horizontal cnc machining setups can incur freight oversize fees. Get a shipping quote before you place the order, not after.
- Expedite costs: If you're paying rush fees on tooling, that's a planning failure, not a cost of doing business. In 2024, our rush order premiums were 30% of total freight. We cut that by 60% just by consolidating orders and forecasting two weeks ahead.
The transparency rule: The vendor who lists all fees upfront—even if the total looks higher—usually costs less in the end. The vendor who quotes a low unit price and adds 'handling' and 'documentation' fees at invoice? I've learned to ask 'what's NOT included' before 'what's the price.'
What Most People Get Wrong
The biggest mistake is treating tooling as a commodity. Sandvik Coromant turning inserts are not generic widgets. The engineering behind the coating, the substrate, the chipbreaker geometry—that's intellectual property. If you're treating the purchase like buying screws, you're leaving money on the floor.
Some common pitfalls to avoid:
- Assuming 'same grade number' means same performance across different suppliers. It doesn't. The material science is proprietary.
- Letting operators stockpile inserts 'just in case.' That's not flexibility, it's dead capital. One plant I audited had $12,000 in unopened inserts in a drawer labeled 'spares.'
- Ignoring the tool holder condition. A worn-out holder will destroy a new insert in minutes. Check your tool holders before you blame the insert.
- Not reviewing your annual tooling spend report. If you don't look at the data, you can't manage it. I review ours every quarter. Takes 30 minutes. Found $8,000 in savings last year.
Bottom line: Audit your tooling spend with these five steps. You'll find savings you didn't know were there—and you'll make better decisions about the next sandvik coromant products order. The goal is not the lowest unit price. The goal is the lowest cost per good part. Period.
