4-011-04-0821 VALVE ELEK. 5/2 2.5-7 BAR GR.04 24 V DC Solenoid Valve

Looking for the 5/2 pilot valve that sits on a Homag CNC machine and will not shift? This is 4-011-04-0821, also written 4011040821. It is a 5/2 directional solenoid valve for Homag CNC woodworking machines, rated 2.5 to 7 bar with a 24 V DC coil and a GR.04 size code. Condition is new, and it is listed as a woodworking machine spare part. Both number formats refer to the same valve, so you can order with whichever one is printed on your machine label or parts list.

A machining centre that stops because one pilot valve will not shift costs a line of output over a hand-sized part. The same three things go wrong: an old body wears until a clamp or feed cylinder creeps, the number on the machine label does not match the supplier page, and a low-value pneumatic item gets quoted with a lead time longer than the part.

The 4-011-04-0821 is a 5/2 directional solenoid valve for Homag CNC woodworking machines. Five ports and two positions: supply enters at the pressure port, is routed to one of the two outlets, and the unloaded outlet exhausts, so one body moves a double-acting cylinder both ways. The range is 2.5 to 7 bar and the body carries the GR.04 size code.

The coil is rated 24 V DC, the value a Homag control cabinet supplies, so the existing plug and cable stay. Replacement is a pneumatic job: isolate the air, disconnect the supply and the two outlet lines, unplug the coil, undo the mounting screws and fit the new body on the same face.

Both numbers, 4-011-04-0821 and 4011040821, identify the same valve: the first is the dashed format, the second is the same digits without separators. Condition is new. Read the number off the old body before ordering, because several 5/2 valves look identical outside.

What decides whether this valve drops into your machine as it is:

• 5/2 function — five ports, two positions; one body drives a double-acting cylinder both ways, so a clamp or feed unit needs one part number, not two 3/2 valves.
• 2.5 to 7 bar — the whole window is usable, so a line regulated at 6 bar runs mid-range, not at the limit of its rating.
• 24 V DC coil — the rating Homag CNC cabinets supply, so the existing plug, cable and cabinet output stay exactly as they are.
• GR.04 size code — printed in the part name, so you compare the size against the old body before you disconnect a line.
• Two number formats — 4-011-04-0821 and 4011040821 resolve to one valve, so a parts list in either format matches in one lookup.
• Catalogued for Homag CNC machines — not adapted from another platform, so port positions line up with the original body.
• New condition — coil, spool and seals start their service life at your installation, with no exchange body involved.
• Pneumatic-only swap — two mounting screws, one supply line, two outlets and one coil plug; nothing in the cabinet is touched.
• One purchase order — it sits beside vacuum pods, pressure wheels, chain pads and sensors, so wear parts and this valve ship together.

When a 5/2 valve fails, the choice is between the machine builder's quotation and a look-alike that may not match the coil. This part removes the choice:

• You order by the number you can read. 4-011-04-0821 and 4011040821 are both on the page, so the search ends at the first lookup, not the fourth phone call, and the quote carries one unambiguous number.
• Nothing in the cabinet changes. A 24 V DC coil is what the Homag control supplies, so the old cable and plug stay and no relay or rewiring is added to the job.
• One spare covers both directions. A 5/2 body handles extend and retract, so one part replaces two 3/2 valves on the shelf.
• The pressure window fits a shop line. At 6 bar the valve sits inside 2.5 to 7 bar, not at the end of its travel every shift.
• Three checks before the old valve comes off. Two numbers plus the GR.04 code give three points to compare against the machine before the air is isolated.
• Small part, long stop. A stalled clamp or feed circuit holds every cycle behind it, while a new valve of this size is one line on the order.

Homag CNC woodworking machines. It is catalogued as a woodworking machine spare part for Homag CNC equipment, and its 5/2 function, 2.5 to 7 bar range and 24 V DC coil match the pneumatic circuits on those machines.

Five ports and two positions. Supply air enters at the pressure port and is routed to one of two outlet ports while the other outlet exhausts, which is the pattern that moves a double-acting cylinder out and back from one valve.

Between 2.5 and 7 bar. Keep the supply regulator inside that window: a line set at 6 bar sits comfortably in range, and the valve is not designed to run outside it.

Yes. The coil is rated 24 V DC, the value Homag CNC control cabinets supply, so the existing plug and cable are reused when the valve is replaced.

Yes, they are one valve in two number formats. 4-011-04-0821 is the dashed form and 4011040821 is the same digits without separators, so order with whichever appears on your parts list.

New. The unit is supplied in new condition, so the coil, spool and seals are not carried over from a used valve.

Match the number on the old valve body or the machine's pneumatic diagram. Look for 4-011-04-0821 or 4011040821, then confirm the 5/2 function, the 2.5 to 7 bar range and the GR.04 size code agree.

Only if that circuit matches the same three values. It needs a 5/2 function, a supply between 2.5 and 7 bar, and a 24 V DC coil output; where those match, the valve does the same job, and where they do not, it is the wrong part.