{"id":535,"date":"2026-05-26T01:04:44","date_gmt":"2026-05-26T01:04:44","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=535"},"modified":"2026-05-26T01:04:44","modified_gmt":"2026-05-26T01:04:44","slug":"pls-precision-servo-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/ceb\/product\/pls-precision-servo-gearbox\/","title":{"rendered":"Taas-Katukma nga Compact Planetary Gearbox para sa Servo Integration \u2014 PLS Series (PLS70\u2013PLS190)"},"content":{"rendered":"

<\/main><\/p>\n
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High-Precision Compact Gearbox \u2014 Where Servo Performance Demands More<\/h2>\n
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\"PLS<\/p>\n

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\u22643′<\/div>\n
Pagsumbalik-sulbad (arcmin)<\/div>\n<\/div>\n
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14,000<\/div>\n
Max rpm (PLS70)<\/div>\n<\/div>\n
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1,000<\/div>\n
Max Torque (N\u00b7m)<\/div>\n<\/div>\n
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97%<\/div>\n
Peak Efficiency<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Ang PLS series precision planetary gearbox<\/strong> extends the performance class of our PLE\/PLF precision range into a higher torque bracket while maintaining the \u22643 arcmin backlash specification that precision servo applications demand. Five frame sizes from PLS70 through PLS190 deliver rated output torque from 27 N\u00b7m up to 1,000 N\u00b7m<\/strong> \u2014 covering servo motors from compact 50 W units to 5,000 W industrial servo drives in a single series selection framework.<\/p>\n

The standout specification is the 14,000 rpm maximum input speed<\/strong> on the PLS70 frame \u2014 the highest in our entire planetary gearbox<\/a> range. This enables direct coupling to high-speed brushless servo motors that run at 6,000\u201310,000 rpm without requiring intermediate coupling stages or spindle-speed reduction. Sealed lifetime lubrication, IP54 protection, and any-angle mounting make PLS series equally suited to vertical joint actuators in robots, horizontal feed axes in CNC machining centres, and cleanroom-compatible semiconductor handling systems.<\/p>\n

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\ud83c\udfaf \u22643 Arcmin Precision<\/div>\n
Tightest backlash in our heavy-torque range \u2014 up to 1,000 N\u00b7m output.<\/div>\n<\/div>\n
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\u26a1 14,000 rpm Input<\/div>\n
Highest input speed in the product line \u2014 supports high-speed servo motors directly.<\/div>\n<\/div>\n
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\ud83d\udd27 Zero Maintenance<\/div>\n
Sealed lifetime lube, 30,000-hour life \u2014 cleanroom compatible by design.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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PLS70 \/ PLS90 \/ PLS120 \/ PLS150 \/ PLS190 \u2014 Model Comparison<\/h2>\n

All five frames maintain the \u22643 arcmin precision-grade backlash specification and \u226597% single-stage efficiency. The progression from PLS70 to PLS190 increases torque capacity and output shaft bearing load rating while reducing maximum input speed to match the lower-rpm characteristics of higher-power servo motors.<\/p>\n

\"PLS<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nPLS70<\/th>\nPLS90<\/th>\nPLS120<\/th>\nPLS150<\/th>\nPLS190<\/th>\n<\/tr>\n<\/thead>\n
Rated Output Torque<\/td>\n27\u201390
\nN\u00b7m<\/span><\/td>\n		50\u2013180
\nN\u00b7m<\/span><\/td>\n		100\u2013350
\nN\u00b7m<\/span><\/td>\n		200\u2013600
\nN\u00b7m<\/span><\/td>\n		400\u20131,000
\nN\u00b7m<\/span><\/td>\n<\/tr>\n
Max Input Speed (no-load)<\/td>\n14,000
\nrpm<\/span><\/td>\n		10,000
\nrpm<\/span><\/td>\n		8,000
\nrpm<\/span><\/td>\n		6,000
\nrpm<\/span><\/td>\n		6,000
\nrpm<\/span><\/td>\n<\/tr>\n
Compatible Motor Power<\/td>\n50\u2013400 W<\/td>\n200\u20131,000 W<\/td>\n500\u20132,000 W<\/td>\n1,000\u20133,500 W<\/td>\n2,000\u20135,000 W<\/td>\n<\/tr>\n
Backlash (Precision Grade)<\/td>\n\u2264 3 arcmin \u2014 all frame sizes<\/td>\n<\/tr>\n
Backlash (Standard Grade)<\/td>\n\u2264 5 arcmin \u2014 all frame sizes<\/td>\n<\/tr>\n
Full-Load Efficiency<\/td>\n\u2265 97% single-stage \u00b7 \u2265 94% two-stage<\/td>\n<\/tr>\n
Gear Ratio Range<\/td>\n3 : 1 \u2014 512 : 1 (single & multi-stage)<\/td>\n<\/tr>\n
Temperatura sa Pag-operate<\/td>\n\u221225 \u00b0C to +90 \u00b0C<\/td>\n<\/tr>\n
Protection Class<\/td>\nIP54 standard \u00b7 IP65 available<\/td>\n<\/tr>\n
Service Life (rated load)<\/td>\n30,000 hours<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 PLS vs PLE\/PLF Selection: <\/span>
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\nPLS series targets applications requiring higher output torque than PLE\/PLF can deliver<\/strong> (above 1,000 W motor) while maintaining the same \u22643 arcmin precision specification. If your application uses a motor below 1,000 W, PLE\/PLF is the appropriate choice with equivalent precision at lower cost.
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PLS Series \u2014 Precision at Higher Power<\/h2>\n

The PLS series occupies the performance gap between precision servo reducers limited to small motors and high-power industrial reducers that sacrifice backlash accuracy. Understanding where PLS sits in the full product family helps engineers make the right selection decision the first time.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Serye<\/th>\nPagbalik-balik<\/th>\nKinatas-ang Torque<\/th>\nMax Input rpm<\/th>\nLabing Maayo Para sa<\/th>\n<\/tr>\n<\/thead>\n
PLS (this series)<\/td>\n\u22643 arcmin<\/td>\n1,000 N\u00b7m<\/td>\n14,000 rpm<\/td>\nHigh-power servo, large robot joints, precision CNC<\/td>\n<\/tr>\n
PLE\/PLF<\/td>\n\u22644\u20136 arcmin<\/td>\n~200 N\u00b7m<\/td>\n14,000 rpm<\/td>\nStandard servo, small-medium robot joints<\/td>\n<\/tr>\n
PZB<\/td>\n\u22643 arcmin<\/td>\n2,000 N\u00b7m<\/td>\n\u2014<\/td>\nHigh-power + noise-sensitive (>6 kW)<\/td>\n<\/tr>\n
PF<\/td>\n6\u201312 arcmin<\/td>\n625 N\u00b7m<\/td>\n3,500 rpm<\/td>\nHeavy industrial, shock loads, IP65<\/td>\n<\/tr>\n
PL<\/td>\n10\u201320 arcmin<\/td>\n800 N\u00b7m<\/td>\n10,000 rpm<\/td>\nGeneral automation, cost-optimised<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 Decision Rule: <\/span>
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\nChoose PLS<\/strong> when you need \u22643 arcmin backlash AND your motor exceeds 1,000 W.
\nChoose PLE\/PLF<\/strong> for \u22644 arcmin at motors below 1,000 W.
\nChoose PZB<\/strong> when motor power exceeds 6 kW and noise is a constraint.
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Engineering Architecture \u2014 How PLS Maintains \u22643 Arcmin at High Torque<\/h2>\n

Achieving \u22643 arcmin backlash at 1,000 N\u00b7m output torque presents a fundamentally different manufacturing challenge than achieving the same backlash at 200 N\u00b7m. Higher torque requires larger gear teeth with greater dimensional tolerances \u2014 yet backlash must be held tighter. PLS series resolves this through four interconnected design decisions that work together rather than independently.<\/p>\n

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  1. 1<\/span>\n
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    Four-Planet Carrier Symmetry<\/strong><\/p>\n

    PLS190 uses four planet gears rather than three, distributing the 1,000 N\u00b7m output torque across four simultaneous contact points. This reduces per-tooth Hertz stress to levels equivalent to a three-planet unit at one-third the torque \u2014 enabling tighter manufacturing tolerances without pushing surface pressure beyond the material fatigue limit that would degrade backlash over time.<\/p>\n<\/div>\n<\/li>\n

  2. 2<\/span>\n
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    Diamond-Lapped Ring Gear Bore<\/strong><\/p>\n

    The ring gear internal tooth surface undergoes a final diamond-lapping operation after grinding, achieving surface finish Ra \u22640.2 \u00b5m and removing residual grinding burn layers that could cause micro-pitting under high-cycle contact stress. This preserves initial backlash specification throughout the 30,000-hour service life rather than allowing gradual wear-induced increase.<\/p>\n<\/div>\n<\/li>\n

  3. 3<\/span>\n
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    Integrated Output Flange Bearing Pre-Set<\/strong><\/p>\n

    The output flange and its angular-contact bearing pair are assembled and preloaded as a single matched unit, then measured for radial and axial runout before installation into the housing. Matched-bearing preloading eliminates the bearing clearance that contributes 20\u201330% of total measurable backlash in conventional assemblies using separate standard bearings.<\/p>\n<\/div>\n<\/li>\n

  4. 4<\/span>\n
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    100% Final Backlash Sorting \u2014 No Statistical Sampling<\/strong><\/p>\n

    Every PLS unit is measured individually on a calibrated angular encoder bench. Units that measure above the grade limit are classified to the next grade down (precision to standard, standard to stock) rather than shipped as precision grade with a statistical defect rate. This means the backlash specification on the label is a guaranteed measured value, not a population mean.<\/p>\n<\/div>\n<\/li>\n<\/ol>\n<\/section>\n

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    High-Power Precision Applications \u2014 Where PLS Excels<\/h2>\n
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    Large Industrial Robot Joints<\/h3>\n

    Six-axis industrial robots rated for 10\u201330 kg payloads use servo motors in the 1,000\u20133,500 W range for shoulder and elbow joints \u2014 precisely the power range where PLE\/PLF tops out and PLS begins. The \u22643 arcmin backlash matches the \u22640.05 mm TCP (tool centre point) repeatability specification that industrial robot manufacturers specify as standard. PLS150 and PLS190 handle the high output torque from combined motor torque and payload inertia at extended reach positions. Pairs naturally with precision CV drive shafts<\/a> for forearm link extensions.<\/p>\n<\/div>\n

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    5-Axis CNC Machining Centres<\/h3>\n

    5-axis CNC machines with tilting rotary table A and B axes drive tables carrying workpieces up to 200 kg through 3,500 W servo motors. Positioning accuracy at these axes directly determines surface quality on titanium and nickel alloy aerospace parts. PLS series \u22643 arcmin backlash translates to \u00b10.05\u00b0 angular accuracy at the tool-workpiece interface \u2014 meeting ISO 10791-1 Grade 1 rotary axis positioning requirements without additional error compensation algorithms.<\/p>\n<\/div>\n

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    Semiconductor FOUP Handling<\/h3>\n

    Front-opening unified pod (FOUP) transfer robots in 300 mm wafer fabs operate in Class 1 cleanrooms where any particle generation from the gearbox disqualifies the unit. PLS series sealed housing and grease fill prevents particle shedding; the \u22643 arcmin specification maintains FOUP slot alignment within \u00b11 mm at 1.2 m arm reach. PLS70 and PLS90 cover the 50\u2013400 W servo motors typical of FOUP handler joint actuators.<\/p>\n<\/div>\n<\/div>\n

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    Application Quick Reference<\/h3>\n