HKM-641235 Gas Coffee Bean Roasting Machine Stainless Drum Cyclone Chaff Collector Digital Temp Control

HKM-641235 · coffee equipment · Confirm before ordering (metric and US units listed) · net weight in the table

Three Digital Controllers and a Stainless Drum With Cyclone ChaffGas Drum Roaster 3 Controllers 5 kg

A gas-fired drum roaster built around three digital controllers — batch timer, hot air temperature and bean temperature — with a stainless drum, a cyclone chaff collector, a blower, and a cooling tray with its own stirring arms.

Front panel controls for power, heating, timing, cooling and mixing, plus a manual gas valve. This is the shape of machine a small roastery or a serious home setup graduates to.

A drum holds the beans, gas heats the drum, and a fan pulls air through the batch and out through a cyclone that drops the chaff.

At a Glance

• Model — HKM-641235
• Type — Gas-fired drum coffee roaster
• Heat source — Gas, manual valve control
• Drum — Stainless steel
• Controllers — Batch timer, hot air temp, bean temp
• Panel controls — Power, heating, timing, cooling, mixing
• Chaff handling — Cyclone separator with blower
• Cooling — Separate tray with stirring arms
• Body — Stainless panels on a black frame
• Plug options — AU, EU, UK
• Capacity — Confirm batch size before ordering
• Installation — Gas supply, ventilation and commissioning by a qualified technician

Drum, Burner and Frame

Heat goes into a rotating steel drum, the drum transfers it to the beans by contact and by the air moving through it, and the beans are stirred continuously so no part of the batch sits against hot metal long enough to scorch.

That is the whole principle. Everything else on the machine exists to control how much heat arrives, how fast air leaves, and when the process stops.

Gas is the reason this design survives in small roasteries. A flame responds immediately: turn the valve down and the heat drop arrives in seconds rather than minutes, which is what makes it possible to steer a roast through first crack instead of watching it run away.

• Type: Gas-fired drum coffee roaster
• Heat source: Gas burner with manual valve
• Drum: Stainless steel, rotating
• Controllers: Batch timer, hot air temperature, bean temperature
• Panel controls: Power, heating, timing, cooling, mixing
• Chaff handling: Cyclone separator, blower, collection container

The trade is that gas needs a proper supply, a proper regulator and proper ventilation, and none of those are optional. A drum machine also gives you two temperature readings that mean different things.

Airflow, Chaff and Cooling

The panel carries three digital displays.

The timer counts the batch, which is how every roast gets logged: charge, first crack, drop. The bean temperature probe is the one you steer by once the batch is under way.

The hot air probe tells you what the drum is doing between batches and during the gaps in a back-to-back session.

Three readouts are enough because roasting is a two-variable problem at this scale: heat in, air out, measured against time.

Who It Fits and How It Roasts

Ventilation is the other half. A gas roaster produces heat, moisture and smoke, and the exhaust has to leave the room rather than settle in it.

A hood or a duct to outside, sized for the machine, plus a carbon filter if the exhaust is near neighbours, is the baseline.

• Bean temperature is the batch itself
• Watching the gap between them tells you whether the drum is storing heat or dumping it
• A roaster who writes down those three numbers for every batch builds a record they can
• A roaster who does not is starting from scratch each time

What's in the Box

HKM-641235 ships in one carton with the the product and the parts listed above. Check each item against the list before the first use, and keep the carton for the first month in case something has to go back.

Color and Finish

Every session: empty the chaff, wipe the cooling tray, brush the drum door seal. Every few sessions: vacuum the drum and the exhaust path, check the flame appearance, and look for soot at the cyclone inlet which means the mixture is off.

Seasonally: have the gas line and regulator checked, and replace any hose that has hardened.

Care and Maintenance

The drum itself wants almost nothing beyond keeping it clean and dry. A dry brush and a vacuum do the job. The gas valve on the panel is manual, which means the operator is part of the control loop.

That is normal for this class of machine and it is also the reason a few habits matter: open the valve slowly, watch the flame through the sight glass rather than assuming it lit, and close it fully at the end of a session rather than relying on the burner control alone.

Installation is where many problems start. The machine wants a regulated supply at the pressure specified for your region, a shut-off valve within reach, and a hose that is rated for the fuel you are using.

LPG and natural gas are not interchangeable, and a roaster set up for one will not run correctly on the other. Tell us which you have before the unit ships.

Specifications

Frequently Asked Questions

Service and Policies

Coverage that lasts beyond the box. Orders ship free with a tracking number in 2 to 5 business days. From delivery, the product is protected for 180 days against manufacturing defects and transit damage, returnable within 30 days for a full refund, and covered by a 24-month parts-and-labor warranty on manufacturing defects. Four policies, one idea: ship it free, protect it for 180 days, take it back for 30, and stand behind it for two years.

HKM-641235 · gas-fired drum coffee roaster · stainless drum and body panels · three digital controllers for batch time, hot air temperature and bean temperature · front panel controls for power, heating, timing, cooling and mixing · manual gas valve · cyclone chaff collector with blower · cooling tray with motorised stirring arms · hopper with damper · AU, EU or UK plug · ships free with tracking · 24 month parts and labor warranty