Lares Handpiece Repair

Expert Lares Handpiece Repair Service

Lares Research handpieces are well regarded for solid mechanical design and strong cutting performance, and they remain in daily service in practices across the country. The 557 and 757 in particular have long production histories and a large installed base.

We service every Lares model with parts manufactured in our own Orange, California facility. Lares instruments respond very well to proper rebuilding — a worn one is rarely a candidate for replacement.

Lares Models We Service

Lares 557 Small Head and 757 Large Head high-speeds in push-button and standard chuck configurations, single-port and multi-port variants, the Lares Power Series, and Lares low-speed motors and attachments.

If your Lares instrument is not listed, call or text us before shipping — the range we service is wider than any list, and we would rather tell you honestly up front than have you pay to ship something we cannot help with.

What Happens to Your Lares Handpiece Here

Every Lares repair follows the same six-stage bench process. Nothing is skipped because an instrument looks straightforward.

1. Inspection and diagnosis. The instrument is examined under magnification and run on test air so we can confirm the actual fault rather than the reported symptom. Concentricity, bearing condition, chuck grip, air and water paths, and fiber-optic transmission are each checked.
2. Free written estimate. You receive a detailed estimate before any work begins. Nothing is started without your approval, and if you decide against the repair we return the handpiece free of charge.
3. Disassembly and ultrasonic cleaning. The handpiece is fully stripped and ultrasonically cleaned. Years of dried lubricant, autoclave residue and debris come out of passages that surface cleaning never reaches.
4. Component replacement. Worn bearings, O-rings, seals, turbines and chuck components are replaced. We manufacture roughly 85% of these parts ourselves in Orange, California, to tolerances that meet or exceed the original specification.
5. Reassembly and calibration. The instrument is rebuilt to the manufacturer's torque and alignment specifications, then lubricated to that manufacturer's requirements — not a generic procedure.
6. Performance testing under load. Every repair is tested under working load, not merely spun up. We verify free-running speed, concentricity, chuck retention, water spray pattern and fiber-optic output before it is cleared to ship.

Why Our Parts Matter for Lares Repairs

Most repair companies buy replacement bearings and turbines from third-party suppliers, which means the quality of your repair depends on whatever that supplier shipped. We are a manufacturer first: Handpiece Parts & Products, Inc. has produced dental handpiece components in Orange, California since 1978, and roughly 85% of the parts going into your Lares repair come off our own production floor.

That control matters most in the bearings. Bearing tolerance and cage material determine how long a rebuilt handpiece survives, and it is the specification customers never see and cannot verify. Manufacturing our own means we set that specification rather than inherit it.

Making Your Lares Handpiece Last Longer

Most of the wear we see is avoidable. These are the points that make the largest practical difference:

• Lares turbine bearings must be installed with a proper turbine press. This is the most common reason a previously repaired Lares comes back vibrating — bearings seated off-axis will not survive, no matter how good the parts are.
• Match parts to the exact head configuration. The 557 small head and 757 large head take different components, and single-port and multi-port variants differ again.
• Keep drive-air pressure within specification and replace coupler O-rings routinely; leaking O-rings produce power loss that mimics turbine wear.

Our complete handpiece maintenance guide covers the full routine in detail, and the ceramic versus steel bearing comparison explains why bearing choice affects how long your next repair lasts.

Send Us Your Lares Handpiece

Free shipping both ways, a free estimate before any work begins, and a 9-month parts-and-labor warranty — three months beyond the industry standard. Most repairs ship back within 24 to 48 hours of arrival.