Thermaltronics M8K100 Knife Solder Tip, 4.83mm (0.19") — 800 Series
Thermaltronics M8K100 — Knife Solder Tip, 4.83mm (0.19"), 800 Series
The Thermaltronics M8K100 is an 800 Series knife soldering tip designed for high thermal demand soldering applications. The knife profile with a 4.83mm (0.19") blade width and 2.03mm (0.08") tin area is optimized for drag soldering dense lead arrays, cutting and forming wire, SMA/large connector terminations, and applications requiring aggressive heat delivery to high-mass joints. Compatible with the Thermaltronics TMT-9000S-1 and TMT-9000S-2 systems and also a drop-in replacement for Metcal MX-500, MX-5000, and MX-5200 handpieces. Lead time is typically 3–4 weeks — order ahead to maintain stock.
Key Specifications
| Specification | Value |
| Part Number / SKU | M8K100 |
| Series | 800 Series (high thermal demand) |
| Tip Style | Knife |
| Tip Width | 4.83mm (0.19") |
| Tin Area | 2.03mm (0.08") |
| Tip Length | 16.4mm (0.65") |
| Compatible Stations | Thermaltronics TMT-9000S-1, TMT-9000S-2 |
| Metcal Compatible | Metcal MX-500, MX-5000, MX-5200 |
| Lead Time | 3–4 weeks (order ahead) |
Soldering Tip Care Guide
Knife tips have a larger surface area than conical or chisel tips and require consistent care to maintain wettability across the full blade:
- Tin the full blade surface before and after each use — apply fresh solder across the entire knife face to protect the plating from oxidation during idle periods and at session end.
- Use brass wire tip cleaners — brass wool removes flux residue without thermal shock. Wet sponge cleaning causes repeated thermal cycling that accelerates wear on high-mass tips like knife profiles.
- Keep the tin area active — the 2.03mm tin area is the primary heat transfer zone. Keep it fully tinned and free of oxidation for reliable heat delivery.
- Use tip tinner/activator on oxidized surfaces — if the blade face shows dewetting (solder beading off the surface), apply tip tinner compound to restore the plating before the tip becomes unrecoverable.
- Avoid mechanical abrasion — do not use sandpaper, files, or abrasive pads to clean the tip — this destroys the iron plating permanently.
- Replace tips showing cracks, pitting, or persistent dewetting — a degraded tip transfers heat poorly and increases the risk of cold joints and component damage.
Frequently Asked Questions
Is the Thermaltronics M8K100 compatible with Metcal MX stations?
Yes — the M8K100 is a direct compatible replacement for Metcal MX-500, MX-5000, and MX-5200 handpieces in addition to the Thermaltronics TMT-9000S-1 and TMT-9000S-2. Thermaltronics M Series tips are manufactured to be drop-in compatible with Metcal MX handpieces, offering a cost-effective alternative to OEM Metcal tips with the same fit and thermal performance.
What is the Thermaltronics 800 Series and when should I use it?
The Thermaltronics 800 Series is designed for high thermal demand soldering — applications where large thermal mass requires aggressive, sustained heat delivery. This includes large through-hole connectors, power terminals, heavy gauge wire, ground planes, and any joint where a standard tip loses temperature rapidly on contact. If your application involves components that are difficult to heat to reflow temperature with a standard tip, the 800 Series is the appropriate choice. For temperature-sensitive or fine-pitch work, use the 600 Series instead.
What applications is a knife tip best suited for?
Knife tips are most effective for drag soldering rows of closely spaced leads, cutting and stripping insulation from fine wire, soldering large flat pads or bus bars, and forming wire ends before termination. The flat blade profile allows the tip to contact multiple leads simultaneously for fast, consistent drag soldering. The M8K100’s 4.83mm blade width makes it well suited for medium-to-large lead arrays and larger pad work.
Why does the M8K100 have a 3–4 week lead time?
Thermaltronics 800 Series tips are manufactured to order. The 3–4 week lead time reflects standard production and fulfillment from Thermaltronics. For operations that rely on this tip, MTE Solutions recommends maintaining a minimum on-hand stock of 2–3 tips and placing replenishment orders before your current supply is exhausted.
