IMS B64 Competition baskets
B64 is IMS’s series for 57mm tampers — the Lelit LELIT57 group. One millimetre narrower than the commercial standard, which is enough that 58mm baskets do not fit.
The three diameters
Every basket in this series shares them. They are quoted from the manufacturer pages cited on the individual entries below, not hand-entered here.
| Measurement | Figure | What it decides |
|---|---|---|
| Border Ø | 64 mm | Whether the basket seats in the portafilter |
| Body Ø | 58 mm | Whether it drops in at all |
| Tamper Ø | 57 mm | Which tamper you need |
If those three numbers being different is a surprise, that is the single most useful thing to understand about basket fitment — see why “58mm” isn’t one standard.
Every basket in the series (2)
| Code | Height | Confidence |
|---|---|---|
| B642TH19.5N | 19.5mm | verified |
| B642TH22N | 22mm | verified |
Dose figures vary by roast level and are published per basket rather than per series, so they live on the individual entries — each one quotes the manufacturer’s own capacity table with the date it was read.
Machines this series fits (1)
- Lelit Anna (PL41TEM) (57mm)
Cross-references follow the manufacturer’s own compatibility list rather than size logic, so a machine of the right diameter is not listed unless the source names it. Sizes covered: 57mm.
Wondering what the code itself means — the digits, the letters, the suffix? See IMS basket codes, decoded.