Introduction
If you grind stainless steel internal bores, you know the challenge.
Stainless steel is tough. It work-hardens. It generates heat. It wears out grinding tools quickly.
And when your CBN grinding head wears out, what do you do?
If you're like most shops, you throw it away and buy a new one.
But what if you didn't have to?
What if you could reuse the same steel body – just apply a fresh CBN layer – and get the same performance as a new tool, at 40-60% of the cost?
That's exactly what re-plating offers.
In this article, we'll explain how re-plating works, why it's more economical than buying new tools, and how it can save your shop thousands of dollars every year.
Part 1: The Problem – Worn-Out CBN Tools
CBN grinding heads are essential for stainless steel internal bore grinding.
Why CBN for Stainless Steel?
| Feature | Why CBN Works for Stainless Steel |
|---|---|
| Hardness | Second only to diamond – grinds tough stainless |
| Chemical stability | No reaction with iron at high temperatures |
| Sharp cutting edges | Clean, smooth bore surfaces |
| Low heat generation | Prevents work hardening of stainless steel |
But CBN Tools Wear Out:
Like all abrasive tools, CBN grinding heads have a limited life. Eventually, the CBN layer wears down and the tool stops cutting effectively.
| Sign of Wear | What It Means |
|---|---|
| Slow cutting | CBN layer is worn |
| Poor surface finish | Tool needs replacement |
| Burning or work hardening | Tool is dull |
| Visible CBN loss | Time for new layer |
The Traditional Approach:
| Step | Action |
|---|---|
| 1 | Use the tool until it's worn |
| 2 | Throw it away |
| 3 | Buy a new one |
| 4 | Repeat |
Cost: Full price for every new tool.
Waste: Steel bodies discarded – even though they're perfectly reusable.
Part 2: The Solution – Re-Plating
Re-plating is the process of stripping the worn CBN layer from an electroplated tool and applying a fresh layer.
How Re-Plating Works:
| Step | Action | Who Does It |
|---|---|---|
| 1 | Return the worn tool to the manufacturer | Customer |
| 2 | Inspect the steel body for damage | Manufacturer |
| 3 | Strip the old CBN layer | Manufacturer |
| 4 | Clean and prepare the steel body | Manufacturer |
| 5 | Electroplate a fresh CBN layer | Manufacturer |
| 6 | Balance and test the tool | Manufacturer |
| 7 | Return the tool to the customer – like new | Manufacturer |
Re-Plating vs. New Tool:
| Aspect | New Tool | Re-Plated Tool |
|---|---|---|
| Cost | 100% | 40-60% |
| Performance | Baseline | Same as new |
| Steel body | New | Reused |
| Lead time | Standard | Often faster |
| Waste | New steel consumed | Less waste |
Part 3: The Economic Advantage – How Much You Save
Cost Comparison:
| Option | Approximate Cost | Tool Life | Cost per Use |
|---|---|---|---|
| New tool | 100% |