{"id":1773,"date":"2026-04-15T05:16:00","date_gmt":"2026-04-15T05:16:00","guid":{"rendered":"https:\/\/worm-reducers.xyz\/?post_type=product&p=1773"},"modified":"2026-04-15T05:41:26","modified_gmt":"2026-04-15T05:41:26","slug":"rv-series-worm-gear-reducer-synchronous-worm-geared-motor-for-screw-jack","status":"publish","type":"product","link":"https:\/\/worm-reducers.xyz\/ko\/product\/rv-series-worm-gear-reducer-synchronous-worm-geared-motor-for-screw-jack\/","title":{"rendered":"RV \uc2dc\ub9ac\uc988 \uc6dc \uae30\uc5b4 \uac10\uc18d\uae30 \/ \uc2a4\ud06c\ub958 \uc7ad\uc6a9 \ub3d9\uae30\uc2dd \uc6dc \uae30\uc5b4 \ubaa8\ud130"},"content":{"rendered":"
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RV Series Worm Gear Reducer \u2014 RV025 to RV150, Motor Direct-Coupled<\/h2>\n
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The RV series \uc6dc \uae30\uc5b4 \uac10\uc18d\uae30<\/strong> from Korea Ever-Power covers ten standard frame sizes \u2014 RV025 through RV150 \u2014 with centre distances running from 25 mm up to 150 mm. Rated input power starts at 0.06 kW on the compact RV025 and reaches 15 kW on the RV150, making this a single product family that scales from light-duty conveyor drives up to heavy synchronous systems in construction jump form rigs and industrial screw jacks.<\/p>\n

Housing material is die-cast aluminium alloy on frames RV025 through RV090, switching to cast iron on RV110 to RV150 where the larger torque outputs require higher housing rigidity. A stainless steel housing option is also available on RV110\u2013RV150 for wash-down or corrosive environments. The worm wheel uses a tin (stannum) bronze alloy or aluminium bronze alloy depending on the specific load and speed requirements at time of order.<\/p>\n

Standard gear ratios run 5:1 through 100:1. All frames accept IEC-normalised motor flanges for direct coupling \u2014 the most common configuration for packaging lines, food processing conveyors, and screw jack synchronous drives where multiple units run on a common shaft or in lock-step with a single motor drive signal.<\/p>\n<\/div>\n

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\uae30\uc220 \uc0ac\uc591<\/h2>\n

The configuration table below covers housing material, shaft material, input\/output options, installation methods, lubrication type, and ratio range. The model parameter table that follows gives the specific shaft diameters and power range for each RV frame size \u2014 use these figures when verifying motor shaft and coupling compatibility.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\uc8fc\ud0dd<\/td>\nDie-cast Aluminum Alloy Gearbox (RV025\u2013RV090)
\nCast Iron Gearbox (RV110\u2013RV150)
\nStainless Steel Gearbox (RV110\u2013RV150)<\/td>\n<\/tr>\n
\uc6dc \ud720<\/td>\nWearable Tin (Stannum) Bronze Alloy, Aluminium Bronze Alloy<\/td>\n<\/tr>\n
\uc6dc \uc0e4\ud504\ud2b8<\/td>\n20Cr steel, carburizing, quenching, grinding; surface hardness 56\u201362 HRC; 0.3\u20130.5 mm carburised layer remaining after precision grinding<\/td>\n<\/tr>\n
\uc785\ub825 \uad6c\uc131<\/td>\nAC Motor \/ Brake Motor \/ DC Motor \/ Servo Motor (direct coupled)
\nIEC-normalised motor flange<\/td>\n<\/tr>\n
Applicable Motors<\/td>\nIEC-normalised AC Motors and Brake Motors; DC Motors; Servo Motors<\/td>\n<\/tr>\n
\ucd9c\ub825 \uad6c\uc131<\/td>\nKeyed Hollow Shaft Output; Hollow Shaft with Output Flange; Plug-in Solid Shaft Output<\/td>\n<\/tr>\n
Options<\/td>\nWorm Shaft Rear Extension, Single Output Shaft, Double Output Shaft, Output Flange, Torque Arm, Dust Cover<\/td>\n<\/tr>\n
\uc124\uce58<\/td>\nFlange Mounted, Foot Mounted, Torque Arm Mounted<\/td>\n<\/tr>\n
\ub9e4\ub044\ub7fd\uac8c \ud558\uae30<\/td>\nGrease Lubrication; Oil-bath and Splash Lubrication<\/td>\n<\/tr>\n
Cooling<\/td>\n\uc790\uc5f0 \ub0c9\ubc29<\/td>\n<\/tr>\n
\ube44\uc728<\/td>\n5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Model Parameters \u2014 RV025 to RV150<\/h3>\n

All shaft diameters below are nominal; actual dimensions are confirmed on dimensional drawings supplied with order. Input\/output hole diameters in parentheses indicate alternative sizes available within that frame.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\ubaa8\ub378<\/th>\n\uc815\uaca9 \ucd9c\ub825<\/th>\n\uc815\uaca9 \ube44\uc728<\/th>\n\uc785\ub825 \uad6c\uba4d \uc9c1\uacbd<\/th>\n\uc785\ub825\ucd95 \uc9c1\uacbd<\/th>\n\ucd9c\ub825 \uad6c\uba4d \u00d8<\/th>\n\ucd9c\ub825\ucd95 \uc9c1\uacbd<\/th>\nCentre Distance<\/th>\n<\/tr>\n<\/thead>\n
RV025<\/td>\n0.06 kW \u2013 0.12 kW<\/td>\n5 \u2013 60<\/td>\n\u03a69<\/td>\n\u03a69<\/td>\n\u03a611<\/td>\n\u03a611<\/td>\n25 mm<\/td>\n<\/tr>\n
RV030<\/td>\n0.06 kW \u2013 0.25 kW<\/td>\n5 \u2013 80<\/td>\n\u03a69 (\u03a611)<\/td>\n\u03a69<\/td>\n\u03a614<\/td>\n\u03a614<\/td>\n30 mm<\/td>\n<\/tr>\n
RV040<\/td>\n0.09 kW \u2013 0.55 kW<\/td>\n5 \u2013 100<\/td>\n\u03a69 (\u03a611, \u03a614)<\/td>\n\u03a611<\/td>\n\u03a618 (\u03a619)<\/td>\n\u03a618<\/td>\n40 mm<\/td>\n<\/tr>\n
RV050<\/td>\n0.12 kW \u2013 1.5 kW<\/td>\n5 \u2013 100<\/td>\n\u03a611 (\u03a614, \u03a619)<\/td>\n\u03a614<\/td>\n\u03a625 (\u03a624)<\/td>\n\u03a625<\/td>\n50 mm<\/td>\n<\/tr>\n
RV063<\/td>\n0.18 kW \u2013 2.2 kW<\/td>\n7.5 \u2013 100<\/td>\n\u03a614 (\u03a619, \u03a624)<\/td>\n\u03a619<\/td>\n\u03a625 (\u03a628)<\/td>\n\u03a625<\/td>\n63 mm<\/td>\n<\/tr>\n
RV075<\/td>\n0.25 kW \u2013 4.0 kW<\/td>\n7.5 \u2013 100<\/td>\n\u03a614 (\u03a619, \u03a624, \u03a628)<\/td>\n\u03a624<\/td>\n\u03a628 (\u03a635)<\/td>\n\u03a628<\/td>\n75 mm<\/td>\n<\/tr>\n
RV090<\/td>\n0.37 kW \u2013 4.0 kW<\/td>\n7.5 \u2013 100<\/td>\n\u03a619 (\u03a624, \u03a628)<\/td>\n\u03a624<\/td>\n\u03a635 (\u03a638)<\/td>\n\u03a635<\/td>\n90 mm<\/td>\n<\/tr>\n
RV110<\/td>\n0.55 kW \u2013 7.5 kW<\/td>\n7.5 \u2013 100<\/td>\n\u03a619 (\u03a624, \u03a628, \u03a638)<\/td>\n\u03a628<\/td>\n\u03a642<\/td>\n\u03a642<\/td>\n110 mm<\/td>\n<\/tr>\n
RV130<\/td>\n0.75 kW \u2013 7.5 kW<\/td>\n7.5 \u2013 100<\/td>\n\u03a624 (\u03a628, \u03a638)<\/td>\n\u03a630<\/td>\n\u03a645<\/td>\n\u03a645<\/td>\n130 mm<\/td>\n<\/tr>\n
RV150<\/td>\n2.2 kW \u2013 15 kW<\/td>\n7.5 \u2013 100<\/td>\n\u03a628 (\u03a638, \u03a642)<\/td>\n\u03a635<\/td>\n\u03a650<\/td>\n\u03a650<\/td>\n150 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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How the RV Worm Drive Reduces Speed and Multiplies Torque<\/h2>\n

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The RV \uc6dc \uae30\uc5b4 \uac10\uc18d\uae30<\/strong> converts the high-speed rotary motion from the input motor to low-speed, high-torque output through a crossed-axis worm-and-wheel mesh. The worm shaft \u2014 a helical screw thread precision-ground from 20Cr steel and hardened to 56\u201362 HRC \u2014 engages the worm wheel at 90 degrees. Each complete turn of the worm advances the wheel by one tooth, so a wheel with 40 teeth and a single-start worm produces a 40:1 ratio.<\/p>\n

Contact geometry is line-contact along the worm helix rather than point-contact as in a crossed helical gear. This spreads load over a longer arc, improving torque capacity and heat distribution across the tooth mesh. At gear ratios of 20:1 and higher with a single-start worm, the output shaft is self-locking under static load \u2014 a property that eliminates the need for a separate holding brake on vertical screw jacks, gate actuators, and vertical conveyors.<\/p>\n

\"RV<\/p>\n

The worm shaft surface hardness of 56\u201362 HRC with a residual carburised layer of 0.3\u20130.5 mm after precision grinding ensures the worm contact face resists wear even under continuous cyclic loading characteristic of screw jack and jump form systems, where the gearbox operates under repeated load reversal as the form moves up and resets.<\/p>\n

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Why the RV Series Is Specified for Synchronous Drive Systems<\/h2>\n

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\u2726 Ten Standard Frame Sizes \u2014 One Product Family<\/strong><\/p>\n

RV025 through RV150 share a consistent design language. When a system requires multiple gearboxes of different torque ratings \u2014 as in a multi-point screw jack array \u2014 the entire range is sourced from a single supplier with the same documentation and spare parts ecosystem.<\/p>\n<\/div>\n

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\u2726 Material Grade Scales with Frame Size<\/strong><\/p>\n

Small frames (RV025\u2013RV090) use lightweight die-cast aluminium alloy. Large frames (RV110\u2013RV150) switch to cast iron for the higher housing rigidity needed at torques above 1,000 Nm. No compromise on either end of the range.<\/p>\n<\/div>\n

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\u2726 Self-Locking Output \u2014 No Brake Required at \u2265 20:1<\/strong><\/p>\n

The single-start worm at ratios of 20:1 and above produces a lead angle below the mesh friction angle, locking the output shaft against back-driving. In screw jack and lifting applications this means the load holds position when the motor is de-energised \u2014 a critical safety property that avoids a separate electromagnetic brake.<\/p>\n<\/div>\n

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\u2726 Multiple Output Shaft Configurations<\/strong><\/p>\n

Keyed hollow shaft, hollow shaft with output flange, and plug-in solid shaft configurations allow the same gearbox model to connect to different downstream components \u2014 leadscrew, chain sprocket, belt pulley, or direct flange coupling \u2014 without a custom adapter.<\/p>\n<\/div>\n

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\u2726 Stainless Steel Housing Option on Large Frames<\/strong><\/p>\n

RV110\u2013RV150 are available with stainless steel housings for food processing and wash-down environments where the cast iron version would corrode over time. This extends the product’s reach into meat, dairy, and pharmaceutical drive applications.<\/p>\n<\/div>\n

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\u2726 Servo Motor Compatibility<\/strong><\/p>\n

IEC-normalised flanges accept servo motor face plates directly. For construction jump form systems that require precise synchronisation across multiple jack points, servo-motor-driven RV gearboxes provide the speed feedback control that hydraulic systems cannot achieve at the same cost point.<\/p>\n<\/div>\n<\/div>\n

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Where the RV Series Worm Gear Reducer Is Used<\/h2>\n

\u25b8 Screw Jack Jump Form Systems \u2014 Construction<\/h3>\n

A jump form system for high-rise concrete construction uses multiple screw jacks positioned around the formwork perimeter. Each jack must extend and retract in synchrony \u2014 within a few millimetres of each other \u2014 to prevent the formwork from racking. The RV series \uc6dc \uae30\uc5b4 \uac10\uc18d\uae30<\/strong> is coupled directly to a synchronous AC motor or controlled by a servo drive at each jack point. The self-locking worm holds the formwork in position during concrete pour without continuous motor power. Typical configuration: RV090 or RV110 at 30:1\u201350:1, motor power 0.75\u20132.2 kW per jack.<\/p>\n

\"RV<\/p>\n

\u25b8 Industrial Screw Jacks \u2014 Multi-Point Lifting<\/h3>\n

Multi-point screw jack arrays used for lifting and positioning heavy industrial loads \u2014 press platens, machine bases, mould clamping systems \u2014 require all jack points to move at identical speed and stop within sub-millimetre tolerance. A common driveshaft or synchronised servo drives all RV gearboxes simultaneously. The worm gear’s inherent self-locking protects the load if any single drive fails mid-lift. RV110\u2013RV150 at 50:1\u2013100:1 covers the typical torque range for 5\u201350 tonne multi-point jack arrays.<\/p>\n

\"RV<\/p>\n

\u25b8 Food Processing Conveyor Lines<\/h3>\n

In multi-zone conveyor systems \u2014 such as a pasteuriser tunnel with separate approach, treatment, and exit belt sections \u2014 the speed of each zone must be independently controlled but synchronised to the overall line speed. Small RV series units (RV040\u2013RV063) at ratios of 20:1 to 40:1, paired with AC or servo motors, provide the independent speed control and positional stability needed for each conveyor zone, with the stainless steel housing option available for the wash-down zones. For more \uc6dc \uae30\uc5b4 \uac10\uc18d\uae30<\/a> options across all configurations and frame sizes, see the product category.<\/p>\n

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Motor-to-Gearbox Connection \u2014 What to Check Before Assembly<\/h2>\n

Four items must be verified before finalising the motor and gearbox combination:<\/p>\n

\"Worm<\/p>\n