Burette Clamp, Extention 1

Quick Answer: The Burette Clamp, Extention 1 is an extension burette clamp: two jaws on a long rod that fits a boss head, so a burette or tube can be held further out from the retort stand than a short clamp allows. The listing image shows broad, flat jaws with an orange coating, closed by a wing nut.

Why Extension Length Matters

The long rod of the Burette Clamp, Extention 1 slides through a boss head on the stand and can be set at any reach before the boss head is tightened. That adjustable distance lets a burette sit over the centre of a flask on a magnetic stirrer, or clear the edge of a wide stand base, instead of hugging the upright.

The jaws shown for this number are wide, flat pads with a thick coating. Flat pads spread the grip over more of the glass, which suits burettes and straight tubes; for round flask necks a three-finger clamp holds more securely. ‘Extention’ in the title is a spelling of extension, and the ‘1’ separates this listing from the Burette Clamp, Extention 2, whose photograph shows narrower arms with small black tips.

Longer reach also means more leverage on the boss head. Use the full reach for light items such as a burette or thermometer, and bring heavier glassware closer to the upright.

Applications

• Titrations on a magnetic stirrer, where the burette must sit over the centre of the stirrer plate
• Holding a boiling tube over a burner at a safe distance from the stand
• Supporting a thermometer in a large beaker or water bath
• Holding a drying tube or small glass column in a gas train

Specifications

Care & Handling

• Slide the rod into a boss head whose slot opens upward, then set the reach before tightening.
• Keep the orange coating out of burner flames; plastic coatings soften and char with heat.
• Clean the jaw pads with a damp cloth after spills, since dried salts make the pads slip.

Why Choose LabEquip

Extension clamps are mostly bought by labs whose stands carry stirrers, heating mantles or wide bases that push glassware outward. LabEquip lists both numbered patterns in the General Lab Products range; ask us which one suits your glassware.

Frequently Asked Questions

What is an extension clamp?

It is a clamp on a long rod that fits into a boss head. The rod can be slid in or out to set how far the held item sits from the stand, which a short clamp cannot do.

How is Extention 1 different from Extention 2?

The listing uses the numbers to separate two patterns and gives no dimensions. The photographs show broad, flat, orange coated pads on number 1 and narrower arms with small black tips on number 2.

Do I need a boss head with this clamp?

Yes. The long rod has no fixing of its own, so it is held in one slot of a boss head while the other slot grips the retort stand upright.

Can it hold a round-bottom flask?

It can hold the neck of a small flask, but flat pads touch a round neck along only two narrow lines. For round flasks of any size a three-finger clamp gives a more secure three-point grip.

Is the jaw coating heat resistant?

Plastic jaw coatings are not meant for direct flame or very hot surfaces. Hold heated tubes by their cooler upper end and keep the jaws out of the burner flame.

How far out can the burette be held?

As far as the rod allows, but stability falls as reach increases. Keep the combined weight over the stand base, and use a heavier base or a second clamp for anything more than light glassware.

Last Updated: September 2026