Rotary Mixers - How to Use Them and What to Look for When Buying

Infiltration preparation of samples for electron microscopy can be done using the PELCO® R1 Rotary Mixer. It is a single speed mixer with a slow rotational speed that ensures improved infiltration without air bubbles and is well suited for preparation of tissue samples.

The mixer consists of a cabinet that houses the motor and a Mixer Head that holds the specimen containers. It comes with the Collet Assembly already in position. Only the mixer head needs to be attached to the collet with the supplied black finger screw and locking washer.

Assembly of PELCO® R1 Rotary Mixer

If the Collet Assembly comes loose or is removed: The collet should be attached back to the motor shaft using the set screw supplied and a 1/16” Allen (hex) wrench. The collet should be placed about 0.8 mm (1/32”) from the cabinet so that it does not rub against it during rotation of the mixer head. Another crucial point is to ensure that the set screw strikes the flat portion of the motor shaft during the tightening procedure. Then the mixer head is slipped over the collet. The finger screw is then inserted with the locking washer through a small hole in the mixing head and the finger screw is tightened. Hand tightening is sufficient as the internal tooth washer will prevent slippage between the finger screw and washer head.

The mixer head of the 1055 and 1055-220 mixers utilize the PELCO® Glass Snap-Cap Vials Product Nos. 12701–12708. The "Snap-Cap" feature seals the contents of the vial, protecting both the sample and the operator. An optional rotator head available for this unit with a 23-hole capacity is Prod. No. 1056. Sample vials that fit this optional head are Prod. No. 410 and 411.

After switching on the instrument, a rotation speed of about 10 rpm is obtained. At full load, a high torque motor maintains instrument speed.

Based on which feet the equipment is resting on, a 55° or 35° tilt is obtained.

Connection to an electrical source 110-120 V AC, 60 Hz (No. 1055), or 220-240 V AC, 50/60 Hz (No. 1055-220) is via a standard grounded electrical cord and plug. The motor circuit is protected by two 5 x 20 mm GDB 250 V (0.1 A) fuses.

If the head fails to rotate, the following should be checked:

  1. The connection of the electrical cord.
  2. The fuse at the rear of the cabinet.
  3. The tightness of the collet screw.

Product and accessory descriptions

Prod No. Description
1055 PELCO R1 Rotator w/1058 Head, 115 V, 60 Hz
1055-220 PELCO R1 Rotator w/1058 Head, 220 V, 50/60 Hz
1058 R1 Rotator Head with 12 holes, (32 mm O.D.)
1056 R1 Rotator Head with 23 holes, (16.3 mm O.D.)
12701 Glass Snap-Cap vials, 4 ml, 23 mm D x 27 mm H
12702 Glass Snap-Cap vials, 8 ml, 22 mm D x 39 mm H
12703 Glass Snap-Cap vials, 12 ml, 22 mm D x 51 mm H
12704 Glass Snap-Cap vials, 16 ml, 30 mm D x 40 mm H
12706 Glass Snap-Cap vials, 24 ml, 30 mm D x 52 mm H
12708 Glass Snap-Cap vials, 32 ml, 30 mm D x 63 mm H
410 Sample Vials, 2 ml, 12 mm D x 38 mm, cs/288
411 Sample Vials, 4 ml, 15 mm D x 48 mm, cs/144


PELCO® R1 Rotary Mixer

ted pella

This information has been sourced, reviewed and adapted from materials provided by Ted Pella, Inc.

For more information on this source, please visit Ted Pella, Inc.


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Ted Pella, Inc.. (2023, May 15). Rotary Mixers - How to Use Them and What to Look for When Buying. AZoM. Retrieved on May 20, 2024 from

  • MLA

    Ted Pella, Inc.. "Rotary Mixers - How to Use Them and What to Look for When Buying". AZoM. 20 May 2024. <>.

  • Chicago

    Ted Pella, Inc.. "Rotary Mixers - How to Use Them and What to Look for When Buying". AZoM. (accessed May 20, 2024).

  • Harvard

    Ted Pella, Inc.. 2023. Rotary Mixers - How to Use Them and What to Look for When Buying. AZoM, viewed 20 May 2024,

Ask A Question

Do you have a question you'd like to ask regarding this article?

Leave your feedback
Your comment type

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.