KaVo INTRA Head L67 Troubleshooting: Is It Losing Its Pull?

If the KaVo INTRA head L67 suddenly feels like it has lost the pulling power it is known for, there are three likely explanations: the wrong head, a chuck problem, or wear.

This guide helps you work out which.

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Quick answer: First confirm you are using the L67 (2:1, max. 20,000 rpm) and not the L68 (1:1). Then check bur retention and run a head swap test. Faults that follow the head point to the L67 itself.

Could It Be the L68 Instead?

The L67 and L68 share the same chuck design, according to KaVo, but run at different ratios. If speed or pull feels wrong, check the head marking or material number (L67: 1.008.1832; L68: 1.008.1833).

Fault Finder

Symptom	Likely Cause	What to Try	Stop If
Less pull than expected	Wrong head, wear	Confirm L67; swap test	Persists on L67
Bur slips	Chuck wear, debris	Clean deflector area; fresh bur	Still slips
Rough running	Wear or residue	Lubricate; swap test	Persists
Feels too fast	Likely an L68 fitted	Check head marking	Speed wrong on L67
Heat	Cooling or wear	Check cooling; swap test	Continues

Bur Slipping Under Load

KaVo designed the L67 for increased low-down pull, which loads the chuck. Clean the debris deflector area, fit a fresh contra-angle bur, and seat it fully. If it still slips, stop using the head.

Pull fading and burs slipping? Let Repair.Dental check the chuck.

Rough Running

Lubricate with KaVo Spray or the QUATTROcare PLUS, then do a head swap on the same shank. Roughness that follows the L67 means the head needs service.

Scenario (illustrative): An assistant hears a new grinding note from a contra-angle during cavity floor preparation. A head swap shows the shank is fine. The L67 goes in for evaluation, and the appointment continues with a spare head.

When Should You Stop?

Burs that will not stay secure
Heat at the head
Roughness that survives lubrication and a head swap

Could Debris Be Causing the Problem?

KaVo built the L67 with a debris deflector disc. If debris has got past it, you may notice roughness, a gritty feel or a bur that does not seat cleanly. Clean the area thoroughly and lubricate before concluding the head is worn.

What Should You Do With the Head While It Is Being Repaired?

If you have a spare 2:1 or 1:1 INTRA head, fit it to the shank and keep working. If you do not, a reduction contra-angle shank like the MASTERmatic M07 L can take another KaVo head in the meantime. Let our team know your timeline when you start your repair.

L67 Troubleshooting Questions

Why does my L67 feel weaker?

Check it is actually the L67. If it is, a worn chuck or gearing may be the cause.

What is the L67 maximum speed?

KaVo lists 20,000 rpm.

KaVo INTRA Head L67 Troubleshooting Guide | Repair.Dental