Coffee Setup Guide

51mm espresso accessories

Which machines use a 51mm group, exactly what fits it, and what to avoid. Thinnest aftermarket - keep it simple.

Machines with a 51mm group

Chefman CafeMaster Pro
Chefman CafeMaster Pro51mm
Budget 51mm all-in-one; proprietary group, verify parts
Under $300
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Chefman CraftBrew
Chefman CraftBrew51mm
Budget 51mm beginner machine - size-agnostic add-ons only
Under $300
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De'Longhi COM530M
De'Longhi COM530M51mm
51mm combo machine, pressurized baskets, thin upgrade path
Under $300
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De'Longhi COM532M
De'Longhi COM532M51mm
51mm combo unit - pods or pressurized grounds
$300–$600
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De'Longhi Dedica
De'Longhi Dedica51mm
The slimmest real espresso machine · 51mm
Under $300
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De'Longhi Dedica Duo
De'Longhi Dedica Duo51mm
Compact 51mm dual-circuit starter with real 51mm aftermarket
Under $300
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De'Longhi ECP3420
De'Longhi ECP342051mm
Forgiving 51mm starter with real aftermarket paths
Under $300
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De'Longhi La Specialista Arte Evo
De'Longhi La Specialista Arte Evo51mm
Guided 51mm all-in-one with a real barista kit and honest non-pressurized baskets
$300–$600
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De'Longhi La Specialista Touch
De'Longhi La Specialista Touch51mm
51mm bean-to-cup · sensor steam wand
$600–$1000
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De'Longhi Linea Classic
De'Longhi Linea Classic51mm
Budget 51mm beginner machine - forgiving, pressurized, quietly upgradeable.
Under $300
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De'Longhi Stilosa
De'Longhi Stilosa51mm
Compact 51mm entry machine · EC260
Under $300
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What size to buy
Buy 51mm. Tampers and distributors can go 50mm (1mm under); baskets, shower screens and portafilters must be an exact 51mm match.
What to avoid
54mm and 58mm parts will not seat or seal in a 51mm group - there is no adapter.

How 51mm compares

51mm Budget entry
De'Longhi Dedica
De'Longhi Dedica
Fits: Basic bottomless portafilters and a few baskets.
Thinnest aftermarket - keep it simple.
54mm Breville standard
Breville Bambino Plus
Breville Bambino Plus · Breville Bambino · Breville Barista Express
Fits: Bottomless PFs, single-wall & precision baskets, tampers (53mm), distributors, shower screens.
Deep, beginner-friendly range.
58mm Commercial standard
Gaggia Classic Evo Pro
Gaggia Classic Evo Pro
Fits: VST/IMS precision baskets, bottomless PFs, tampers (58mm), PID & OPV mods.
Widest selection - the upgrade engine.
The one rule: match the size to your group head. Baskets, screens and portafilters must be exact; tampers and distributors go 1mm under (a 53mm tamper for a 54mm Breville). The wrong size will not seat or seal.

Affiliate disclosure: this page contains affiliate links. If you buy through them we may earn a commission at no extra cost to you. We have not physically tested these products; all compatibility analysis is based on manufacturer specifications and publicly available listing data. "Seller-claimed" means a marketplace listing asserts the fit; it is not manufacturer-confirmed. Verify size against your machine before purchase.

Bottomless Portafilters that fit the 51mm group

Spec-inferred from size - likely compatible; verify the listing before buying.

51mm Bottomless Portafilter 3 Ears Compatible with Delonghi Dedica EC680/EC685/EC885 and SMEG, EUPA Espresso Machines, Espresso Naked Bottomless Portafilter with Puck Screen and 18g Filter Basket-Wood
51mm Bottomless Portafilter 3 Ears Compatible with Delonghi Dedica EC680/EC685/EC885 and SMEG, EUPA Espresso Machines, Espresso Naked Bottomless Portafilter with Puck Screen and 18g Filter Basket-Wood
Fits the 51mm group inferred from size 51mm $25–$50
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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51mm Bottomless Portafilter 3 Ears Fits for Delonghi Dedica EC685, EC785, EC885, EC820, EC850, EC860, EC890, EC680 und SMEG and SMEG, Includes Puck Screen, Double Shot Filter Basket
51mm Bottomless Portafilter 3 Ears Fits for Delonghi Dedica EC685, EC785, EC885, EC820, EC850, EC860, EC890, EC680 und SMEG and SMEG, Includes Puck Screen, Double Shot Filter Basket
Fits the 51mm group inferred from size 51mm
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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51mm Bottomless Portafilter 3 ears Only for Delonghi Dedica EC680/EC685/EC785/EC820/EC850/EC860 | with Filter Basket and Wooden Handle
51mm Bottomless Portafilter 3 ears Only for Delonghi Dedica EC680/EC685/EC785/EC820/EC850/EC860 | with Filter Basket and Wooden Handle
Fits the 51mm group inferred from size 51mm
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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51mm Bottomless Portafilter 3 Ears, YMWVH Professional Espresso Portafilter 51mm for De-longhi EC680, EC685 & EC885 Espresso Machine, Stainless Steel Basket and Blackwood Handle
51mm Bottomless Portafilter 3 Ears, YMWVH Professional Espresso Portafilter 51mm for De-longhi EC680, EC685 & EC885 Espresso Machine, Stainless Steel Basket and Blackwood Handle
Fits the 51mm group inferred from size 51mm
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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51mm Bottomless Portafilter 3 Ears，Compatible with Delonghi Dedica EC680/EC685/EC885 and SMEG, EUPA Espresso Machines, Espresso Naked Bottomless Portafilter with Filter Basket-Wood (brown)
51mm Bottomless Portafilter 3 Ears，Compatible with Delonghi Dedica EC680/EC685/EC885 and SMEG, EUPA Espresso Machines, Espresso Naked Bottomless Portafilter with Filter Basket-Wood (brown)
Fits the 51mm group inferred from size 51mm $25–$50
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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51mm Bottomless Portafilter Compatible for Delonghi ECP3420/ECP3120/EC155/BCO430/EC260, 2 Ears, with Stainless Steel Double Shot Capacity Cup Filter Basket
51mm Bottomless Portafilter Compatible for Delonghi ECP3420/ECP3120/EC155/BCO430/EC260, 2 Ears, with Stainless Steel Double Shot Capacity Cup Filter Basket
Fits the 51mm group inferred from size 51mm
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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+10 more bottomless portafilters fit the 51mm group.

Portafilters that fit the 51mm group

Spec-inferred from size - likely compatible; verify the listing before buying.

51mm Portafilter 3 Ears with Double Spout Compatible for Delonghi Dedica EC680/EC685/EC785/EC820/EC850/EC860-ABS Handle
51mm Portafilter 3 Ears with Double Spout Compatible for Delonghi Dedica EC680/EC685/EC785/EC820/EC850/EC860-ABS Handle
Fits the 51mm group inferred from size 51mm $25–$50
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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Filter Baskets that fit the 51mm group

Spec-inferred from size - likely compatible; verify the listing before buying.

51mm Espresso Filter Basket, Double 2-Cup Stainless Steel Portafilter Basket, Compatible with De'Longhi Dedica EC680 EC685 ECP Gevi Casabrews 51mm, Pressurized Dual-Wall,14-18g Capacity
51mm Espresso Filter Basket, Double 2-Cup Stainless Steel Portafilter Basket, Compatible with De'Longhi Dedica EC680 EC685 ECP Gevi Casabrews 51mm, Pressurized Dual-Wall,14-18g Capacity
Fits the 51mm group inferred from size 51mm
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
⚠ Check first: Dose range 14-18g - match it to your grinder output.
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Distributors that fit the 51mm group

Spec-inferred from size - likely compatible; verify the listing before buying.

51mm Espresso Tamper and Distributor, MATOW Dual Head Coffee Leveler Compatible with Delonghi 51mm Portafilter, Adjustable Depth-Professional Espresso Hand Tampers
51mm Espresso Tamper and Distributor, MATOW Dual Head Coffee Leveler Compatible with Delonghi 51mm Portafilter, Adjustable Depth-Professional Espresso Hand Tampers
Fits the 51mm group inferred from size 51mm $25–$50
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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CREMA Coffee Products 51mm Hand Tamper & Coffee Distributor for Delonghi | Compatible w/any 51mm | Double-Sided, Adjustable Depth Tool | Durable 304 Stainless Steel | Black
CREMA Coffee Products 51mm Hand Tamper & Coffee Distributor for Delonghi | Compatible w/any 51mm | Double-Sided, Adjustable Depth Tool | Durable 304 Stainless Steel | Black
Fits the 51mm group inferred from size 51mm $25–$50
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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Gaskets that fit the 51mm group

Spec-inferred from size - likely compatible; verify the listing before buying.

51mm Silicone Gasket Sealing Ring Compatible with Delonghi Dedica EC680/EC685/EC885/EC890/EC950,La Specialista EC9335M/EC9355M/EC9665M Espresso Machines Gasket Replacement BPA Free-2pcs
51mm Silicone Gasket Sealing Ring Compatible with Delonghi Dedica EC680/EC685/EC885/EC890/EC950,La Specialista EC9335M/EC9355M/EC9665M Espresso Machines Gasket Replacement BPA Free-2pcs
Fits the 51mm group inferred from size 51mm Under $25
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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Group Gasket For Delonghi Dedica EC680/685, 51mm Silicone Steam Ring, Durable, No BPA Grouphead Gasket Replacement Part
Group Gasket For Delonghi Dedica EC680/685, 51mm Silicone Steam Ring, Durable, No BPA Grouphead Gasket Replacement Part
Fits the 51mm group inferred from size 51mm Under $25
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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Puck Screens that fit the 51mm group

Spec-inferred from size - likely compatible; verify the listing before buying.

51mm Ultra-Thin Espresso Puck Screen (0.2mm) - 2 Pack 316 Stainless Steel Puck Screen COMPATIBLE WITH Delonghi Dedica EC680 EC685 EC885, SMEG, Gevi - Zero Headspace Impact
51mm Ultra-Thin Espresso Puck Screen (0.2mm) - 2 Pack 316 Stainless Steel Puck Screen COMPATIBLE WITH Delonghi Dedica EC680 EC685 EC885, SMEG, Gevi - Zero Headspace Impact
Fits the 51mm group inferred from size 51mm
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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CREMA Coffee Products 51mm Puck Screen for Barista Models | 1.7mm Thick 316L Steel Filter | Balanced Water Flow for Improved Extraction | Prevent Channeling & Reduce Maintenance |Durable,Easy to Clean
CREMA Coffee Products 51mm Puck Screen for Barista Models | 1.7mm Thick 316L Steel Filter | Balanced Water Flow for Improved Extraction | Prevent Channeling & Reduce Maintenance |Durable,Easy to Clean
Fits the 51mm group inferred from size 51mm Under $25
Why: Sized 51mm - fits the 51mm group. Compatibility inferred from size; verify the listing before buying.
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Compatibility here is inferred from portafilter size, not hands-on testing. Always confirm the listed size against your machine's group before buying - see our methodology and size chart.

Affiliate disclosure: this page contains affiliate links. If you buy through them we may earn a commission at no extra cost to you. We have not physically tested these products; all compatibility analysis is based on manufacturer specifications and publicly available listing data. "Seller-claimed" means a marketplace listing asserts the fit; it is not manufacturer-confirmed. Verify size against your machine before purchase.