{"id":1613,"date":"2026-08-21T10:48:14","date_gmt":"2026-08-21T02:48:14","guid":{"rendered":"https:\/\/lqcncparts.com\/?post_type=news&p=1613"},"modified":"2026-08-19T11:12:02","modified_gmt":"2026-08-19T03:12:02","slug":"bomba-de-lubrificacao-para-maquinas-cnc-como-escolher-e-configurar","status":"publish","type":"news","link":"https:\/\/lqcncparts.com\/pt\/noticias\/bomba-de-lubrificacao-para-maquinas-cnc-como-escolher-e-configurar\/","title":{"rendered":"Bomba de lubrifica\u00e7\u00e3o para m\u00e1quinas CNC: como escolher e configurar"},"content":{"rendered":"

LONGQIAO Technical Team | CNC Motion Components, Jinan Longqiao Electromechanical Equipment Co., Ltd. | Published August 21, 2026<\/p>\n

A escolha do lubrificante e os intervalos de manuten\u00e7\u00e3o s\u00e3o especificados pelo fabricante das suas guias, parafusos e rolamentos. O procedimento abaixo descreve o m\u00e9todo a seguir. Caso haja alguma discrep\u00e2ncia em rela\u00e7\u00e3o \u00e0 documenta\u00e7\u00e3o fornecida com os seus componentes, siga as instru\u00e7\u00f5es da documenta\u00e7\u00e3o.<\/p>\n

A CNC machine needs lubricant delivered to every guide block and ball nut<\/a> <\/strong><\/span>on a schedule. Hand pumps suit low-duty machines with an operator who remembers. Electric units suit machines that run unattended. The choice matters less than the piping and the interval behind it.<\/p>\n

Decide what you are lubricating before you buy anything<\/h2>\n

Walk the machine and write down every point that takes lubricant. On a typical three-axis build that means each guide block, each ball nut, and the fixed-end support bearings if they are not sealed for life. Sealed bearings do not want to be re-greased and will tell you so by running hot.
\nFor each point, record the fitting thread and orientation. Guide blocks are usually supplied with a fitting on one end face and a plug on the other, which lets you feed from whichever side the machine geometry allows. Blocks that arrive plugged on both ends need one plug removed before anything will flow, and a surprising number of retrofit complaints trace back to exactly that.<\/p>\n

Verification for this step: a written list where every line has a point, a fitting type and a feed direction. If you cannot say which side you are feeding each block from, you are not ready to route tube.<\/p>\n

\"Parafuso<\/p>\n

Hand pump or electric unit?<\/h2>\n\n\n\n\n\n\n\n\n\n
<\/td>\nHand pressure oil pump<\/b><\/strong><\/td>\nElectric lubrication unit<\/b><\/strong><\/td>\n<\/tr>\n
Trigger<\/td>\nOperator action<\/td>\nTimer or machine signal<\/td>\n<\/tr>\n
Suits<\/td>\nShort daily run times, few points, machines that are always attended<\/td>\nUnattended cycles, lights-out running, many points<\/td>\n<\/tr>\n
Failure mode<\/td>\nForgotten. Nothing warns you<\/td>\nRuns dry, blocks a line, or over-delivers without anyone noticing<\/td>\n<\/tr>\n
Feedback<\/td>\nOperator feels resistance and sees the reservoir drop<\/td>\nNeeds a level sensor or a habit of checking<\/td>\n<\/tr>\n
Retrofit cost<\/td>\nPump, tube, fittings<\/td>\nPump, tube, fittings, power, and a control signal<\/td>\n<\/tr>\n
Maintenance<\/td>\nReservoir top-up, occasional seal<\/td>\nReservoir, timer settings, motor, and the same tube and fittings<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The honest version of this decision is not about machine class. It is about whether the person operating the machine will actually pull the handle. A hand pump on a well-run shop floor with a shift checklist outperforms a badly set electric unit that pushes grease into a line nobody has checked in a year. An electric unit on a machine running overnight is not a preference, it is the only option that works.<\/p>\n

Where machines get sold or moved between sites, we lean toward electric, because the operator habit does not travel with the machine.<\/p>\n

Verification for this step: one configuration chosen, with a named reason you could defend to whoever pays for it.<\/p>\n

Oil or grease, and why you cannot switch casually<\/h2>\n

Guide blocks and ball nuts are supplied with seals and internal geometry suited to one lubricant family. ISO 12090 covers linear rolling bearings and ISO 3408 covers ball screws; both product families assume a specified lubricant type rather than whatever is on the shelf.<\/p>\n

Two rules that cause most of the damage when broken:<\/p>\n

    \n
  1. Do not push grease through a system designed for oil, or oil into a grease system. Line diameters, pump pressure and metering behaviour differ.<\/li>\n
  2. Do not mix grease thickeners. Two greases that each work fine can separate when combined and leave a soap plug in the block.<\/li>\n<\/ol>\n

    If a machine’s history is unknown, flush rather than guess. And label the machine with the designated lubricant, because the next person will not read this article.<\/p>\n

    Verification for this step: one lubricant designated, written on a label fixed to the pump.<\/p>\n

    Lay out the distribution before you cut tube<\/h2>\n

    This is the step people skip, and it is the step that decides whether the far axis ever sees lubricant.<\/p>\n

    Lubricant follows the path of least resistance. Tee a single line to five points of unequal tube length and the nearest point takes most of the flow while the furthest takes almost nothing. Two ways to deal with it:<\/p>\n

      \n
    1. Balance by resistance. Make branch lengths and diameters as close to equal as the machine allows. Simple, cheap, and only reliable when the points are genuinely similar.<\/li>\n
    2. Meter each branch. Distribution blocks or metering units apportion volume regardless of downstream resistance. More parts, more cost, and the only approach that holds up when one branch is short and another runs the length of a gantry.<\/li>\n<\/ol>\n

      Sketch the run on paper with approximate lengths before ordering fittings. Put the pump where the reservoir is visible without opening a guard, not where the bracket happened to fit.
      \nVerification for this step: a sketch showing pump position, trunk, every branch, and where each branch terminates.<\/p>\n

      Route and secure the tube<\/h2>\n

      Cut tube square with a proper cutter. A tube cut with side cutters seals badly at the fitting and can shed a burr into the line.<\/p>\n

      Route away from chips and coolant streams where possible. Anything crossing a moving axis goes inside a corrente de arrasto para cabos<\/a><\/strong><\/span> with the same slack rules as the cables \u2014 no tension at full extension, no coiling at full retraction. Clip the tube at intervals so it cannot sag into the work envelope.<\/p>\n

      Leave a service loop at each block. A block that has to be removed for inspection should not require the tube to be cut.<\/p>\n

      Verification for this step: run each axis to both hard limits by hand or at low feed and watch the tube. No stretch, no rubbing, no pinch.<\/p>\n

      Prime the system and bleed every branch<\/p>\n

      A newly built system is full of air, and air compresses. Until the last outlet is bled, your pump is compressing air rather than delivering lubricant.<\/p>\n

        \n
      1. Fill the reservoir with the designated lubricant.<\/li>\n
      2. Disconnect the tube at the point furthest from the pump.<\/li>\n
      3. Cycle the pump, manually or by triggering the electric unit, until lubricant flows steadily from that open end with no air.<\/li>\n
      4. Reconnect, then repeat for each remaining branch.<\/li>\n
      5. Wipe every fitting dry and cycle once more, watching for weeping joints.<\/li>\n<\/ol>\n

        Skip this and the machine can run for weeks with an axis receiving nothing while the pump appears to be working normally.<\/p>\n

        Verification for this step: lubricant seen at every outlet, and every joint dry after a cycle.<\/p>\n

        Set the interval, then correct it from evidence<\/p>\n

        Start from whatever the component documentation specifies. If nothing is specified, base the first setting on how far the axis actually travels rather than on how long the machine is switched on. A machine idling in a warm shop consumes almost nothing; a machine running long roughing passes consumes far more in the same eight hours.<\/p>\n

        Then change one variable at a time and read the machine:<\/p>\n

          \n
        1. After a normal production day, wipe a clean finger along the rail beside the block. A thin film that shows on the cloth is correct. A dry, matte rail is under-delivery. Visible running lines or a pool under the block is over-delivery.<\/li>\n
        2. Check the reservoir drop over a known number of production days. A reservoir that never moves is a blocked line or a pump not being triggered, not a frugal machine.<\/li>\n
        3. Listen. A dry block on a fast axis develops a distinct dry rasp before it develops any measurable accuracy problem.<\/li>\n<\/ol>\n

          Adjust interval before you adjust volume per shot. Frequent small deliveries hold a film better than infrequent large ones.<\/p>\n

          Verification for this step: three consecutive production days where the rail film reads the same. If it drifts, something upstream is not stable.<\/p>\n

          \"Corrente<\/p>\n

          What starvation and flooding actually look like<\/h2>\n

          Under-delivery is the failure most people plan for. Over-delivery is the failure most people cause.<\/p>\n

          A starved guide block runs hot, then noisy, then loses preload as the raceways wear. The accuracy loss usually shows up as a repeatability problem long before anyone connects it to lubrication. It is a slow, expensive failure, and by the time it is visible the block is finished.<\/p>\n

          Flooding is different. Excess oil washes chips into the block, carries coolant past the seals, and pushes lubricant out onto the workpiece where it interferes with finish and, in food or medical work, contaminates the part. It also masks the diagnostic signal above, since a rail can be wet with over-delivered oil while the raceway inside is running on a broken film. Flooding costs less in bearings and more in scrap.<\/p>\n

          The common misconception worth naming: that a manual pump handled twice as often is “safer than forgetting.” It is not. It is a different failure, and on a machine cutting wet, often the more expensive one.<\/p>\n

          One more edge case, since it catches machine builders specifically. Vertical axes drain. A Z-axis block on a fast-cycling machine loses film downward between deliveries in a way a horizontal axis does not, and the interval that works on X and Y can leave Z marginal. Where the axes run from one pump, either meter the vertical branch separately or set the whole system to the requirement of the axis that needs the most.<\/p>\n

          What we supply, and what we do not publish<\/h2>\n

          Our lubrication unit range covers two documented configurations:<\/p>\n