SUMTAK Industrial Rotary Encoders, Angular Sensors, and CNC Handwheels

Factory-direct international supply of authentic SUMTAK optical rotary encoders, magnetic feedback sensors, and precision CNC manual pulse generators.

SUMTAK IRS Solid Shaft Optical Incremental Rotary Encoders (Series IRS3, IRS5, IRS6)

SUMTAK IRS series optical incremental rotary encoders—including compact IRS3 (35 mm outer diameter), standard IRS5 (56 mm body), and rugged IRS6 (66 mm body)—deliver high-precision angular position and velocity feedback across CNC machine tool axes, automation motion controllers, and industrial

servo motor systems. Featuring precision optical code discs read by advanced optoelectronic detector arrays, these units deliver pulse resolutions from 100 to 6,000 pulses per revolution (PPR) at electrical response frequencies reaching 300 kHz.

Built with robust integral bearing assemblies and offering differential RS-422 Line Driver or NPN Open Collector outputs, IRS encoders ensure noise-immune signal transmission over extended cabling lengths, serving as direct equivalents and functional replacements for Heidenhain ROD 1000 and ROD 400

encoder models.

Comprehensive resolution range: available from 100 up to 6,000 pulses per revolution with frequency response capability up to 300 kHz
Standard industrial form factors: body diameters of 35 mm (IRS3), 56 mm (IRS5), and 66 mm (IRS6) with solid precision shafting of 6, 8, and 10 mm
Robust output configurations: differential Line Driver (RS-422 standard) and NPN open collector options matching diverse CNC controller inputs
CNC motion controller compatibility: direct drop-in replacement and cross-referencing for Fanuc, Mitsubishi, Yaskawa, Siemens, and Heidenhain ROD series

SUMTAK IRH and IRT Hollow Shaft Incremental Encoders (Series IRH3, IRT3, IRH5)

SUMTAK IRH and IRT hollow-shaft incremental rotary encoders (featuring blind hollow and through-bore geometries across IRH3 35 mm and IRH5 56 mm sizes) are engineered for direct, compact installation onto motor shafts, machine tool spindles, and lead screws without external flexible couplings.

An integrated leaf-spring stator coupling absorbs axial and radial shaft runout while providing high torsional rigidity, ensuring zero-backlash angular measurement during high-acceleration reversing cycles.

Offering bore sizes from 6 to 12 mm, these encoders output A/B quadrature channels along with an index marker Z/C at 5V DC supply, fully aligning with Heidenhain ERN 1100 series (including ERN 1120 and ERN 1130) specifications for precision servo applications.

Direct shaft-mounted design: blind and through-bore hollow shaft diameters of 6, 8, 10, and 12 mm with integrated stator torque plate
Ultra-shallow installation profile: axial mounting depths starting at 28 mm, fitting tight rear-bell housings of industrial servomotors
Accurate quadrature phasing: strict 90° ± 18° electrical phase displacement between channels A and B with gated zero-reference index Z
Heidenhain ERN series equivalence: drop-in functional and dimensional compatibility matching Heidenhain ERN 1100, 1120, and 1130 units

SUMTAK MSK Heavy-Duty Magnetic Encoders (MSK-015, MSK-503, MSK-015-1024)

SUMTAK MSK series heavy-duty magnetic encoders—highlighted by widely deployed models MSK-015-1024, MSK-015-1024-08, and MSK-503—are engineered for severe operating environments where conventional glass optical discs are vulnerable to contamination, thermal shock, or extreme vibration.

Utilizing a non-contact magnetoresistive sensor reading magnetic drum or gear teeth poles, MSK units remain completely impervious to industrial cutting oil mists, condensation, coolant spray, and conductive metallic dust.

Sealed inside a heavy-duty metallic enclosure rated to IP65 with vibration resistance up to 98 m/s² (10 to 2000 Hz), these magnetic encoders accommodate continuous spindle and motor speeds reaching up to 18,000 RPM without signal degradation.

Non-contact magnetic sensing: totally immune to cutting fluids, hydraulic oil aerosols, coolant splashing, and metallic swarf
Industrial IP65 sealing: heavy-duty sealed metallic casing with vibration withstand capability rated up to 98 m/s² across 10–2000 Hz
Proven spindle feedback benchmark: standardized field-proven supply of MSK-015-1024 and MSK-015-1024-08 at 1024 PPR resolution
High-velocity operating limits: sustained pulse fidelity without missing counts under continuous spindle speeds up to 18,000 RPM

SUMTAK LGT and LDA Manual Pulse Generators / CNC Handwheels (LGT-001, LGT-003, LGT-021)

SUMTAK LGT and LDA manual pulse generators (MPGs) and electronic handwheels (including prominent models LGT-001-100, LGT-003-100, LGT-021, and LDA-046) serve as the recognized industry benchmark for manual jog and coordinate positioning panels across Fanuc, Mitsubishi, Mazak, Haas, and Siemens CNC

controllers. Engineered with a precision spring-loaded detent mechanism, these handwheels produce a crisp tactile click at every step position, preventing accidental tool repositioning caused by light contact.

Outputting standard 100 pulses per revolution (100 PPR) in quadrature A/B channels with 5V differential Line Driver or wide-range 4.5–16V Open Collector outputs, they ensure sub-micron coordinate positioning for machine setup operators.

Crisp mechanical detents: standard 100 pulses per revolution (100 PPR) featuring distinctive tactile click feedback at each increment
Extended operational endurance: robust optical rotary mechanism tested for service lifetimes exceeding 1,000,000 full handwheel revolutions
Versatile interface electricals: 5V DC differential Line Driver (LGT-003) and 4.5–16V DC Open Collector outputs (LGT-001/002)
Native CNC panel integration: standard mounting footprint on operator control panels and portable hand pendants for Fanuc, Mazak, and Haas

SUMTAK AT and AEP Single-Turn and Multi-Turn Absolute Optical Encoders

SUMTAK AT and AEP series absolute optical rotary encoders (featuring models such as AT-248, AT-500, and dedicated CNC turret encoders) deliver true angular position data with instantaneous recovery across unexpected factory power outages.

Unlike incremental counterparts, absolute encoders generate an unambiguous digital position word for every discrete angular sector of shaft rotation, completely eliminating the necessity for homing or reference seek routines upon power restoration.

Available with parallel Gray code or pure binary data busses as well as high-speed synchronous serial interfaces (SSI/BiSS), SUMTAK absolute encoders are widely integrated across automated CNC tool turrets, index tables, and robot tool changers.

True non-volatile position retention: immediate coordinate readout without requiring axis homing cycles following power restoration
Multi-bit digital bus formats: parallel Gray code and binary output architectures featuring hardware strobe gating and noise suppression
Synchronous Serial Interface (SSI): high-speed differential RS-422 serial data transfer matching modern programmable motion controllers
Machine tool tooling integration: specialized positioning feedback for CNC tool turrets, indexing tables, and automatic tool changers

SUMTAK LF and LFC Heavy-Duty Industrial Incremental Encoders (LF-102.4BM, LF-100)

SUMTAK LF and LFC series heavy-duty industrial incremental encoders (featuring proven industry references such as LF-102.4BM, LF-100, and LF-500) are engineered to withstand continuous severe operating conditions across steel rolling mills, heavy machine tools, material handling cranes, and textile

manufacturing machinery. The mechanical assembly utilizes a solid reinforced 15 mm stainless steel shaft riding on heavy-duty paired bearing races rated to absorb continuous radial and axial loads reaching up to 49 N.

Protected by oil-resistant dual-lip radial shaft seals conforming to IP55 environmental protection and driven by high-current SN75113 / SN75183 output stages, LF encoders ensure noise-free square-wave transmission over long-distance cable runs exceeding 100 meters.

Reinforced 15 mm solid steel shaft: heavy-duty dual-bearing construction rated to absorb severe radial and axial shaft loads up to 49 N
Rugged IP55 environmental sealing: dual-lip oil-resistant elastomeric seals protecting optical components against spray and grease
Broad resolution scaling up to 5,000 PPR: temperature-compensated optical scale reading designed for continuous heavy mill operations
High-drive differential line drivers: high-power line drivers ensuring pulse integrity across industrial cable lengths exceeding 100 meters

SUMTAK LB, LBJ, and LBL Ultra-Compact Miniature Optical Encoders

SUMTAK LB, LBJ, and LBL series ultra-compact optical rotary encoders (featuring micro-models such as LBJ-001, LBL-100, and LBL-500) provide precision angular motion measurement within a compact 38 mm body diameter utilizing a 6 mm shaft.

Optimized for installation inside space-constrained robotic joint actuators, semiconductor inspection machinery, precision medical instruments, and miniature servomotors, these encoders deliver high resolution up to 2,500 pulses per revolution at frequencies reaching 100 kHz.

High-grade ABEC miniature ball bearings ensure ultra-low starting torque (below 1 mN·m), making LB encoders the preferred choice for low-inertia precision electromechanical assemblies.

Miniature 38 mm body envelope: lightweight design with a 6 mm shaft engineered for tight, weight-sensitive rotary mechanisms
Ultra-low starting breakaway torque: precision ABEC bearing assembly maintaining starting torque below 1 mN·m for sensitive axes
High resolution up to 2,500 PPR: micro-patterned optical code disc delivering high angular fidelity with low rotational inertia
Robotics and medical precision applications: seamless integration into compact robotic joints, semiconductor stages, and medical scanners

SUMTAK Zero-Backlash Couplings, Shielded Cables, and Signal Interface Modules

To preserve sub-micron measurement accuracy and safeguard sensitive optoelectronic circuits, SUMTAK provides a dedicated ecosystem of precision mechanical accessories and electrical interface hardware.

Stainless steel zero-backlash bellows couplings and precision disc couplings (bore diameters from 6 to 15 mm) deliver exceptional torsional stiffness while absorbing angular misalignment up to 2 degrees and axial offsets up to 0.5 mm without angular backlash.

High-flex shielded twisted-pair cables feature ruggedized military-standard circular connectors (MS connectors) or IP67 industrial bayonets, ensuring signal integrity across electromagnetic noise fields.

Complementary interface converter modules execute optical isolation and signal level translation between 5V Line Driver and 24V Open Collector inputs.

Zero-backlash bellows couplings: absorption of axial and angular misalignment with zero angular hysteresis and high torsional rigidity
Shielded cables with military-spec MS connectors: twisted-pair differential signal shielding preventing noise pickup from VFD drives
Opto-isolated interface converters: reliable signal matching across RS-422 Line Driver, Push-Pull, and 24V NPN/PNP logic controllers
Mounting flanges and adaptor brackets: standardized mechanical transition plates facilitating rapid retrofit of legacy third-party encoders

Optoelectronic and Magnetoresistive Transduction Principles in SUMTAK Encoders

Established in Japan with over five decades of engineering excellence, Sumtak Corporation pioneered foundational standards in industrial angular position and velocity sensing.

Within optical encoder families IRS, IRH, LB, and LF, precision measurement relies upon a stabilized gallium arsenide (GaAs) infrared LED light source, a sub-micron etched glass or metallic code grating disc, and a high-speed photodiode detector array.

During shaft rotation, light transmission is systematically modulated by alternating transparent and opaque grating sectors, producing balanced sinusoidal quadrature signals with a 90-degree electrical phase shift.

High-speed comparator circuitry featuring Schmitt-trigger thresholds shapes these signals into crisp differential square-wave channels A and B along with a gated zero-reference index marker Z.

For extremely contaminated machining enclosures, SUMTAK engineers developed the MSK magnetic series, replacing optical glass discs with a high-coercivity magnetic rotor or precision ferromagnetic gear wheel read by differential magnetoresistive sensors.

This design completely eliminates optical fogging, coolant condensation failures, and glass disc cracking under severe cutting shock.

Direct Compatibility with Industrial Fanuc, Mitsubishi, Siemens, and Heidenhain CNCs

Through extensive original equipment manufacturer (OEM) collaborations across global machine tool builders, SUMTAK encoders feature standardized electrical architectures permitting direct field replacement on Fanuc, Mitsubishi Electric, Yaskawa, Siemens, and Heidenhain CNC servo axes.

Differential Line Driver output stages leverage rugged RS-422 line drivers (such as 26LS31 and SN75113), delivering true complementary signal pairs A, /A, B, /B, Z, /Z with differential output voltages exceeding 2.5 V into 100-ohm loads.

This differential structure completely rejects common-mode electromagnetic interference generated by adjacent variable frequency motor drives over industrial cable runs exceeding 50 to 100 meters.

Following Sumtak integration into DR.

JOHANNES HEIDENHAIN GmbH in 2000 and subsequent alignment within HEIDENHAIN K.K., cross-brand compatibility is fully streamlined: solid-shaft IRS3 and IRS5 units directly correspond to Heidenhain ROD 1000 and ROD 400 models, while hollow-shaft IRH3 units match Heidenhain ERN 1100 series servomotor

encoders.

Environmental Sealing and Shock Durability of MSK Magnetic Encoders

SUMTAK MSK series heavy-duty magnetic encoders (such as MSK-015, MSK-015-1024, and MSK-503) are purpose-built for lathe and machining center spindle heads where conventional optical seals degrade under continuous high-pressure coolant splashing and synthetic cutting oil aerosol exposure.

Cast metallic housings sealed with specialized polyurethane potting compound meet full IP65 ingress protection ratings, completely shielding internal circuit boards against liquid penetration.

Outstanding vibration endurance reaching 98 m/s² across 10 to 2,000 Hz eliminates edge jitter and spurious pulse counts under interrupted turning or heavy milling cuts on heat-treated tool steels.

With non-contact air gaps between the magnetic rotor and detector head, mechanical wear is fundamentally zero, yielding operating lifetimes governed solely by the host spindle high-precision ball bearings.

Manual Pulse Generator Integration Across CNC Operator Setup Panels

Electronic handwheels and manual pulse generators (MPGs) across SUMTAK LGT and LDA series (prominently LGT-001, LGT-003, and LGT-021) are deployed worldwide across stationary CNC control consoles and portable pendant units for setup tool setting, workpiece zero probing, and manual axis

micro-jogging.

The manual rotary mechanism integrates a spring-loaded ball detent mechanism delivering clean mechanical resistance and an unmistakable tactile click at every discrete step (standard 100 pulses per complete 360-degree rotation).

This allows machine machinists to accurately sense tool increments by touch and sound without averting visual attention from the machine working envelope.

Front-panel elastomer sealing rings and protective rotor skirts provide IP44 dust and fluid resistance, preventing airborne coolant mist and metallic filings from entering sensitive operator console electronics.

Turnkey Global B2B Export Deliveries of Genuine SUMTAK Encoders

Equipguo delivers direct global export supply of authentic optical encoders, magnetic feedback sensors, and CNC handwheels manufactured by SUMTAK / HEIDENHAIN K.K. for machine builders, industrial repair specialists, and automation distributors worldwide.

Technical validation is conducted strictly against original model nameplates, factory serial designations, and schematic specifications—verifying output stage topology (Line Driver, Open Collector, Push-Pull, SSI), operating supply voltage, bore/shaft diameter, and pulse resolution.

Equipguo provides multi-currency trade financing, compliant export customs clearance, and dependable air freight logistics delivered directly to client manufacturing and maintenance facilities across international markets.

Equipment pricing, delivery schedules, and minimum order quantities for SUMTAK sensors are quoted upon specific commercial inquiry; open price lists are not published.