IMS Precision Filter Basket 53 mm Competition 2T H27.5

IMS Competition Precision Filter Basket 2T 15–20 g H27.5

Upgrade your espresso setup with the IMS Competition Precision Filter Basket B652TH27.5M. Designed for double espresso, this filter basket combines precise basket geometry with 641 uniform micro-holes.

The controlled perforation helps water distribute evenly through the coffee puck. This creates ideal conditions for consistent extraction and makes it easier to work systematically with dosing, grind size, and coffee distribution.

The Competition series from IMS

The IMS Competition series is developed for baristas and espresso enthusiasts who want greater precision than a traditional standard basket provides.

The B652TH27.5M features:

• 641 micro-holes

• Hole diameter of 0.30 mm

• Perforated area of Ø44 mm

• Electropolished surface

• External ridge for retention

• Flat perforated base

• Capacity for a double espresso

The smooth, electropolished surface makes the basket easier to keep clean and reduces roughness around the perforations.

For more controlled espresso extraction

A precision basket cannot prevent channeling on its own. Correct grind setting, uniform distribution, and level tamping are still essential.

However, the uniform perforation provides a more predictable starting point when dialing in your espresso. It can make it easier to identify whether changes in taste are due to dosage, grind size, or brewing conditions.

The basket is suitable for you if you want to work more precisely with:

• Consistent dosing

• Correct puck preparation

• Adjusting the grind size

• Flow time

• The coffee-to-espresso ratio

Dosing and capacity

The product is often marketed as a basket for approximately 15–20 grams of coffee. IMS specifies an average capacity of approximately 15–20 grams, but the optimal dose depends on the roast and density of the coffee.

IMS's recommended capacity ranges are:

• Dark roast coffee: approximately 15–17 g

• Medium roast coffee: approximately 16–19 g

• Light roast coffee: approximately 17–20 g

Use these numbers as a starting point. The correct dose also depends on the grind size, the volume of the puck, and the distance between the coffee surface and the machine's shower screen.

There should be sufficient space above the tamped coffee puck so that it is not pressed hard against the brew head before extraction.

Designed for a 53 mm tamper

The internal diameter of the basket is approximately 54 mm, and IMS specifies compatibility with a 53 mm tamper.

A tamper with the correct diameter helps compress the coffee evenly and reduces the risk of a loose edge around the puck. Always check the actual size of the tamper, as designations may vary between manufacturers.

External retention ridge

The filter basket has an external ridge used by the portafilter spring to hold the basket in place.

This means the basket stays more securely in place when knocking out coffee grounds. However, the ridge can also mean that compatibility depends on the design of the portafilter and its spring.

Check compatibility before purchasing

A 53 mm tamper size does not automatically mean the basket fits all 53 mm espresso machines.

Therefore, check the following measurements on your current filter basket and portafilter:

• Outer rim: 65 mm

• Internal body diameter: 54 mm

• Height: 27.5 mm

• Tamper size: 53 mm

• External retention ridge

The portafilter must have sufficient depth for the basket's height. Feel free to compare your existing basket with the measurements above before ordering.

How to achieve a good result

1. Choose a starting dose that matches the coffee's roast degree.

2. Distribute the ground coffee evenly in the basket.

3. Break up any clumps with a WDT tool.

4. Tamp the coffee horizontally with consistent pressure.

5. Check that there is appropriate space above the coffee puck.

6. Brew the espresso and evaluate the flow, time, and taste.

7. Adjust primarily the grind size while keeping the dosage stable.

A bottomless portafilter can make it easier to see uneven flow but is not necessary to use the filter basket.

Cleaning and maintenance

Knock out the coffee grounds after use and rinse the basket thoroughly with warm water. Regularly check that the micro-holes are not clogged by coffee oils or fine particles.

For thorough cleaning, the basket can be soaked in a suitable cleaner for espresso and coffee equipment. Follow the dosage instructions on the cleaning product, rinse thoroughly after treatment, and avoid tools that can damage the perforations.

Specifications

• Brand: IMS

• Series: Competition

• Model number: B652TH27.5M

• Product type: Double precision filter basket

• Designation: 2T / 2 cups

• Trade specification: 12–20 g

• Average IMS capacity: 15–17 g

• Height: 27.5 mm

• Outer rim: Ø65 mm

• Internal body diameter: Ø54 mm

• Tamper size: Ø53 mm

• Perforated area: Ø44 mm

• Number of micro-holes: 641

• Hole diameter: 0.30 mm

• Ridge: External retention ridge

• Surface treatment: Electropolished

• Basket shape: Double filter basket with flat perforated base

The IMS B652TH27.5M is an obvious choice for the espresso enthusiast who wants a precision basket with uniform perforation and better opportunities to work consistently with their espresso recipe.

Frequently asked questions

How much coffee fits in the filter basket?

The basket is often sold with the designation 15–20 g. IMS specifies an average capacity of 15–20 g, but the appropriate dosage depends on the roast degree, grind size, and density of the coffee.

Which tamper fits the basket?

IMS specifies a tamper diameter of 53 mm. Always check the actual diameter and fit of the specific tamper.

Does the basket fit all espresso machines with a 53 mm tamper?

No. The tamper size is not sufficient to determine compatibility. The portafilter must also fit the basket's outer rim of 65 mm and height of 27.5 mm.

What does 2T mean?

2T means that the filter basket is developed for a double portion of espresso. The letter T refers to the Italian word for cup.

How many holes does the filter basket have?

The basket has 641 micro-holes of 0.30 mm distributed over a perforated area with a diameter of 44 mm.

Does the filter basket have a retention ridge?

Yes. It has an external ridge that helps the portafilter spring hold the basket in place.

Does an IMS basket prevent channeling?

Not on its own. The precise perforation provides a uniform starting point, but correct distribution, grind size, and horizontal tamping remain essential.

Are a portafilter or tamper included?

No. The product consists only of the IMS filter basket. A portafilter, tamper, and other espresso accessories are purchased separately.