{"publisher":"Xirkit — the structured parts marketplace","canonical":"https://www.xirkit.io/products/pololu-4746-131-1-37d-gearmotor-059c","markdown":"https://www.xirkit.io/products/pololu-4746-131-1-37d-gearmotor-059c/data.md","mcp":"https://www.xirkit.io/mcp","note":"Every value is traced to a cited source (see sources and per-value src). Null means unknown, never zero.","record":{"id":"059cb2a4-a5c3-57f6-9db1-f46ae6822061","mpn":"4746","name":"Pololu #4746 131:1 37D Gearmotor","manufacturer":"Pololu","family":"motor","summary":"Pololu #4746 is a 12 V brushed DC 37D metal gearmotor (no encoder) with 131.25:1 reduction (helical first stage), 76 rpm no-load output, 45 kg·cm extrapolated stall torque, 5.5 A extrapolated stall current, 6 mm D-shaft, six M3 face holes, two solder-tab terminals, 37 mm × 57 mm, 195 g.","schema_version":"3.0","revision":null,"tags":["motor","gearmotor motor","pololu","gearmotor","37d gearmotor","pololu 37d","12v gearmotor","brushed dc motor","robotics","131:1 gearmotor"],"sources":[{"other":{},"id":"datasheet","url":"https://www.pololu.com/file/0J1706/pololu-37d-metal-gearmotors.pdf","title":"Pololu #4746 131:1 37D Gearmotor datasheet","publisher":"Pololu","kind":"datasheet","retrieved_at":"2026-10-01T23:13:25+00:00","field_paths":["spec.compliance.certifications","spec.constraints.electrical.supply_voltage_nominal_v","spec.geometry.body_diameter_mm","spec.geometry.body_length_mm","spec.geometry.cad.bbox.height_mm","spec.geometry.cad.bbox.length_mm","spec.geometry.cad.bbox.width_mm","spec.geometry.cad.envelope_complete","spec.geometry.cad.mesh_path","spec.geometry.cad.step_path","spec.geometry.cad.verification","spec.geometry.dimensions.height_mm","spec.geometry.dimensions.length_mm","spec.geometry.dimensions.width_mm","spec.geometry.mounting_holes","spec.geometry.other.weight_g","spec.geometry.shaft_diameter_mm","spec.geometry.shaft_extension_mm","spec.provides.features","spec.provides.feedback","spec.provides.gear_ratio","spec.provides.motor_type","spec.provides.no_load_speed_rpm","spec.provides.output_type","spec.provides.stall_torque_nm","spec.usage.connectors","spec.usage.pinout","spec.usage.pinout_complete","spec.usage.requirements.driver_required","spec.usage.requirements.no_load_current_a","spec.usage.requirements.rated_voltage_v","spec.usage.requirements.stall_current_a"],"notes":"sha256 c83181cc9e00af2a97788029dc364f114d672d4eb33c2dd4340b1676489920b1"},{"other":{},"id":"offer0","url":"https://www.pololu.com/product/4746","title":"www.pololu.com listing","publisher":null,"kind":"distributor","retrieved_at":"2026-10-01T23:50:50+00:00","field_paths":["offers"],"notes":null}],"assets":[{"other":{},"kind":"datasheet","url":"https://www.pololu.com/file/0J1706/pololu-37d-metal-gearmotors.pdf","label":"Datasheet","verification":"manufacturer","notes":null},{"other":{},"kind":"image","url":"https://a.pololu-files.com/picture/0J10494.1200.jpg?f5b665c56025a07e4e198d8bd2d68b26","label":"Pololu #4746 131:1 37D gearmotor (no encoder)","verification":"manufacturer","notes":"inspected: maker product photo"},{"other":{},"kind":"cad","url":"pololu-4746.step","label":"STEP (generated from datasheet drawing)","verification":"generated","notes":"cad_check passed"}],"offers":[{"other":{"sku":"4746","price_breaks":[]},"supplier":"www.pololu.com","url":"https://www.pololu.com/product/4746","currency":"USD","unit_price":38.95,"stock_status":"in_stock","region":"US","minimum_quantity":null,"checked_at":"2026-10-01T23:50:50+00:00","lead_time_days_min":null,"lead_time_days_max":null,"destination":"US","destination_postal_code":null,"notes":null,"price_basis":"listed","unit_price_max":null}],"best_for":[{"other":{},"label":"Mobile robot drive trains","reason":"37 mm 12 V gearmotor at 131:1 — a drive for mid-size wheeled robots (add an external encoder or use the encoder version for closed loop).","basis":"engineering_inference"}],"children":[],"spec":{"other":{},"usage":{"other":{},"pinout":[{"id":"M1","kind":"motor_plus","label":"M1","notes":"solder tab on the motor end cap (polarity sets direction)","other":{},"functions":["m1"],"electrical":{}},{"id":"M2","kind":"motor_minus","label":"M2","notes":"solder tab on the motor end cap (polarity sets direction)","other":{},"functions":["m2"],"electrical":{}}],"derived":{},"connectors":[{"id":"terminals","kind":"two solder tabs on the motor end cap","other":{},"pin_count":2}],"pin_mappings":[],"requirements":{"other":{},"data_inputs":[],"power_inputs":[],"driver_required":"brushed DC H-bridge motor driver sized above the 5.5 A extrapolated stall current","rated_voltage_v":12,"stall_current_a":5.5,"no_load_current_a":0.2},"pinout_complete":true},"geometry":{"cad":{"bbox":{"width_mm":37,"height_mm":73,"length_mm":37},"features":[],"mesh_path":"pololu-4746.stl","step_path":"pololu-4746.step","assumptions":[],"verification":"generated","envelope_complete":true},"other":{"weight_g":195},"derived":{},"dimensions":{"other":{},"width_mm":37,"height_mm":73,"length_mm":37},"feature_boxes":[],"body_length_mm":57,"mounting_holes":[{"x_mm":8.949,"y_mm":0,"other":{},"diameter_mm":3},{"x_mm":4.475,"y_mm":7.751,"other":{},"diameter_mm":3},{"x_mm":-4.475,"y_mm":7.751,"other":{},"diameter_mm":3},{"x_mm":-8.949,"y_mm":0,"other":{},"diameter_mm":3},{"x_mm":-4.475,"y_mm":-7.751,"other":{},"diameter_mm":3},{"x_mm":4.475,"y_mm":-7.751,"other":{},"diameter_mm":3}],"body_diameter_mm":37,"shaft_diameter_mm":6,"shaft_extension_mm":16},"provides":{"other":{},"derived":{},"features":["First gearbox stage uses helical gears to reduce noise and vibration and improve efficiency","Stall values are theoretical extrapolations and should not be used as continuous ratings"],"feedback":"none","gear_ratio":131.25,"motor_type":"gearmotor","output_type":"rotary","capabilities":[],"stall_torque_nm":4.412992,"no_load_speed_rpm":76},"compliance":{"other":{},"derived":{},"certifications":["RoHS 3 compliant"]},"constraints":{"other":{},"derived":{},"thermal":{"other":{}},"electrical":{"other":{},"supply_voltage_nominal_v":12}}},"other":null,"source_type":"pdf","source_ref":"https://www.pololu.com/file/0J1706/pololu-37d-metal-gearmotors.pdf","datasheet":{"cad":{"bbox":{"max":[18.5,18.5,73],"min":[-18.5,-18.5,0],"width_mm":37,"height_mm":73,"length_mm":37},"check":{"failed":[],"passed":true},"expected":[{"d":37,"x":0,"y":0,"axis":"z","name":"body","what":"cylinder"},{"d":6,"x":0,"y":0,"axis":"z","name":"shaft","what":"cylinder"},{"d":3,"x":8.949,"y":0,"axis":"z","name":"H1","what":"hole"},{"d":3,"x":4.475,"y":7.751,"axis":"z","name":"H2","what":"hole"},{"d":3,"x":-4.475,"y":7.751,"axis":"z","name":"H3","what":"hole"},{"d":3,"x":-8.949,"y":0,"axis":"z","name":"H4","what":"hole"},{"d":3,"x":-4.475,"y":-7.751,"axis":"z","name":"H5","what":"hole"},{"d":3,"x":4.475,"y":-7.751,"axis":"z","name":"H6","what":"hole"},{"what":"envelope_z","value":73}],"archetype":"round_can_motor","mesh_path":"/Users/sumeet/Documents/Xirkit Parent/XirkitOnboard/work/pololu-4746/07_cad/part.stl","step_path":"/Users/sumeet/Documents/Xirkit Parent/XirkitOnboard/work/pololu-4746/07_cad/part.step","views_png":"/Users/sumeet/Documents/Xirkit Parent/XirkitOnboard/work/pololu-4746/07_cad/views.png","export_stl":"pololu-4746.stl","assumptions":[],"export_step":"pololu-4746.step","envelope_complete":true},"chips":[],"fields":{"weight":{"src":{"page":38,"quote":"| Weight: | 195 g |","method":"table","table_id":"38_1"},"unit":"g","value":195},"feedback":{"src":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing"},"unit":null,"value":"none"},"mounting":{"src":{"page":25,"quote":"six mounting holes evenly spaced around the outer edge threaded for M3 screws","method":"text"},"unit":null,"value":"six threaded M3 face-mounting holes on a regular hexagon with 15.5 mm adjacent-center spacing"},"connector":{"src":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing"},"unit":null,"value":"two solder tabs on the end cap (no leads)"},"gear_ratio":{"src":{"page":39,"quote":"| Gear ratio: | 131.25:1 |","method":"table","table_id":"39_1"},"unit":null,"value":131.25},"motor_type":{"src":{"page":21,"quote":"powerful brushed DC motor with 131.25:1 metal gearbox","method":"text"},"unit":null,"value":"gearmotor"},"stall_torque":{"src":{"page":39,"quote":"| Stall torque @ 12V: | 45 kg·cm 3 |","method":"table","table_id":"39_1"},"orig":{"unit":"kg·cm","value":45},"unit":"N·m","value":4.4129925},"no_load_speed":{"src":{"page":39,"quote":"| No-load speed @ 12V: | 76 rpm |","method":"table","table_id":"39_1"},"unit":"rpm","value":76},"rated_voltage":{"src":{"page":1,"quote":"operation at 12 V, though in general, this kind of motor can run at voltages above and below the nominal voltage, and","method":"text"},"unit":"V","value":12},"stall_current":{"src":{"page":39,"quote":"| Stall current @ 12V: | 5.5 A 3 |","method":"table","table_id":"39_1"},"unit":"A","value":5.5},"driver_required":{"src":{"page":21,"quote":"| 12 V | 76 RPM, 200 mA | 45 kg⋅cm (630 oz⋅in), 5.5 A |","method":"table","table_id":"21_3"},"unit":null,"value":"brushed DC H-bridge motor driver sized above the 5.5 A extrapolated stall current"},"no_load_current":{"src":{"page":39,"quote":"| No-load current @ 12V: | 0.2 A |","method":"table","table_id":"39_1"},"unit":"A","value":0.2}},"groups":{"all":["M1","M2"]},"source":{"url":"https://www.pololu.com/file/0J1706/pololu-37d-metal-gearmotors.pdf","pages":50,"sha256":"c83181cc9e00af2a97788029dc364f114d672d4eb33c2dd4340b1676489920b1","onboarded_at":"2026-10-01T23:51:09+00:00"},"coverage":{"pct":81.8,"score":"27/33","passed":true,"explained_nulls":["rated_torque","rated_speed","rated_current","operating_temperature"]},"entities":[{"id":"M1","attrs":{"kind":"motor_plus","label":"M1","designator":"M1","description":"solder tab on the motor end cap (polarity sets direction)"},"sources":[{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"}],"attr_src":{"kind":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"},"label":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"},"designator":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"},"description":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"}},"functions":[],"electrical":{},"entity_type":"lead"},{"id":"M2","attrs":{"kind":"motor_minus","label":"M2","designator":"M2","description":"solder tab on the motor end cap (polarity sets direction)"},"sources":[{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"}],"attr_src":{"kind":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"},"label":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"},"designator":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"},"description":{"page":2,"quote":"Gearmotor versions without encoders","figure":"Gearmotor versions without encoders (drawing)","method":"drawing","fragment":"entities_leads.json"}},"functions":[],"electrical":{},"entity_type":"lead"}],"taxonomy":{"spec_table":{"role":"electrical_ratings","definition":"Specification table or list of motor values: step angle, rated voltage/current, winding resistance/inductance, holding/rated/stall torque, speed, phases, insulation, temperature, weight"},"site_chrome":{"role":"other","definition":"Website navigation, related-product and category lists, feedback, services, generator footers, blank pages"},"wiring_leads":{"role":"pins_or_terminals","definition":"Wiring diagram or text naming the motor leads/wires/terminals by colour or pin and which coil/phase/function each connects to"},"pricing_ordering":{"role":"ordering_commercial","definition":"Price, price breaks, item number, stock/status, ordering codes, compliance marks (RoHS/CE)"},"product_overview":{"role":"identity_overview","definition":"Store or catalog description of the motor: what it is, brand, typical use, compatible accessories"},"dimension_drawing":{"role":"mechanical_dimensions","definition":"Dimensioned drawing or text giving body size, flange, bolt pattern, pilot, shaft diameter/length/flat, lead length"},"performance_curve":{"role":"performance","definition":"Torque-speed, pull-out torque, current or efficiency curve, with its test conditions"}},"variants":{},"commercial":{"other":{},"lifecycle":"active","checked_at":"2026-10-01T23:50:50+00:00","compliance":["RoHS 3 compliant"],"ordering_codes":[{"code":"4746","description":"Pololu item number"}]},"mechanical":{"dims":{"body_d":{"src":{"page":38,"quote":"| Size: | 37D × 57L mm 1 |","method":"table","table_id":"38_1"},"note":"37D body diameter","unit":"mm","value":37},"shaft_d":{"src":{"page":38,"quote":"| Shaft diameter: | 6 mm 2 |","method":"table","table_id":"38_1"},"unit":"mm","value":6},"shaft_len":{"src":{"page":21,"quote":"16 mm-long, 6 mm-diameter D-shaped output shaft","method":"text"},"unit":"mm","value":16},"body_length":{"src":{"page":38,"quote":"| Size: | 37D × 57L mm 1 |","method":"table","table_id":"38_1"},"note":"end-cap-equipped body length","unit":"mm","value":57},"mount_pattern":{"src":{"page":25,"quote":"six mounting holes evenly spaced around the outer edge threaded for M3 screws","method":"text"},"value":"six M3 threaded face holes in a regular hexagon, 15.5 mm adjacent-center spacing"},"shaft_profile":{"src":{"page":21,"quote":"D-shaped output shaft","method":"text"},"value":"D"},"face_hole_depth":{"src":{"page":24,"quote":"Warning : Do not screw too far into the mounting holes as the screws can hit the gears. We recommend screwing no more than 3mm (0.12″) into the screw hole.","method":"text"},"note":"conservative CAD depth based on manufacturer maximum recommended screw engagement","unit":"mm","value":3}},"kind":"mechanical","holes":[{"d":3,"x":8.949,"y":0,"src":{"page":25,"quote":"six mounting holes evenly spaced around the outer edge threaded for M3 screws; centers of neighboring holes are 15.5 mm apart","method":"derived"},"face":"front","name":"H1","depth":3},{"d":3,"x":4.475,"y":7.751,"src":{"page":25,"quote":"six mounting holes evenly spaced around the outer edge threaded for M3 screws; centers of neighboring holes are 15.5 mm apart","method":"derived"},"face":"front","name":"H2","depth":3},{"d":3,"x":-4.475,"y":7.751,"src":{"page":25,"quote":"six mounting holes evenly spaced around the outer edge threaded for M3 screws; centers of neighboring holes are 15.5 mm apart","method":"derived"},"face":"front","name":"H3","depth":3},{"d":3,"x":-8.949,"y":0,"src":{"page":25,"quote":"six mounting holes evenly spaced around the outer edge threaded for M3 screws; centers of neighboring holes are 15.5 mm apart","method":"derived"},"face":"front","name":"H4","depth":3},{"d":3,"x":-4.475,"y":-7.751,"src":{"page":25,"quote":"six mounting holes evenly spaced around the outer edge threaded for M3 screws; centers of neighboring holes are 15.5 mm apart","method":"derived"},"face":"front","name":"H5","depth":3},{"d":3,"x":4.475,"y":-7.751,"src":{"page":25,"quote":"six mounting holes evenly spaced around the outer edge threaded for M3 screws; centers of neighboring holes are 15.5 mm apart","method":"derived"},"face":"front","name":"H6","depth":3}],"units":"mm","origin":"output face at z=0; body envelope excludes flexible leads","features":[],"archetype":"round_can_motor","assumptions":{}},"page_index":[{"page":1,"tags":["product_overview","spec_table"],"primary":"spec_table"},{"page":2,"tags":["dimension_drawing"],"primary":"dimension_drawing"},{"page":3,"tags":["product_overview"],"primary":"product_overview"},{"page":4,"tags":["wiring_leads"],"primary":"wiring_leads"},{"page":5,"tags":["performance_curve"],"primary":"performance_curve"},{"page":6,"tags":["performance_curve"],"primary":"performance_curve"},{"page":7,"tags":["performance_curve"],"primary":"performance_curve"},{"page":8,"tags":["performance_curve"],"primary":"performance_curve"},{"page":9,"tags":["performance_curve"],"primary":"performance_curve"},{"page":10,"tags":["performance_curve"],"primary":"performance_curve"},{"page":11,"tags":["performance_curve"],"primary":"performance_curve"},{"page":12,"tags":["performance_curve"],"primary":"performance_curve"},{"page":13,"tags":["performance_curve"],"primary":"performance_curve"},{"page":14,"tags":["performance_curve"],"primary":"performance_curve"},{"page":15,"tags":["performance_curve"],"primary":"performance_curve"},{"page":16,"tags":["performance_curve"],"primary":"performance_curve"},{"page":17,"tags":["performance_curve"],"primary":"performance_curve"},{"page":18,"tags":["performance_curve"],"primary":"performance_curve"},{"page":19,"tags":["product_overview"],"primary":"product_overview"},{"page":20,"tags":["site_chrome"],"primary":"site_chrome"},{"page":21,"tags":["product_overview","pricing_ordering"],"primary":"pricing_ordering"},{"page":22,"tags":["product_overview","spec_table"],"primary":"spec_table"},{"page":23,"tags":["product_overview","spec_table"],"primary":"spec_table"},{"page":24,"tags":["dimension_drawing"],"primary":"dimension_drawing"},{"page":25,"tags":["product_overview"],"primary":"product_overview"},{"page":26,"tags":[],"primary":"product_overview"},{"page":27,"tags":["product_overview","site_chrome"],"primary":"site_chrome"},{"page":28,"tags":["site_chrome"],"primary":"site_chrome"},{"page":29,"tags":["product_overview","site_chrome"],"primary":"site_chrome"},{"page":30,"tags":["site_chrome"],"primary":"site_chrome"},{"page":31,"tags":["site_chrome"],"primary":"site_chrome"},{"page":32,"tags":["site_chrome"],"primary":"site_chrome"},{"page":33,"tags":["site_chrome"],"primary":"site_chrome"},{"page":34,"tags":["site_chrome"],"primary":"site_chrome"},{"page":35,"tags":[],"primary":"product_overview"},{"page":36,"tags":["site_chrome"],"primary":"site_chrome"},{"page":37,"tags":["product_overview","pricing_ordering"],"primary":"pricing_ordering"},{"page":38,"tags":["dimension_drawing"],"primary":"dimension_drawing"},{"page":39,"tags":["spec_table"],"primary":"spec_table"},{"page":40,"tags":["spec_table"],"primary":"spec_table"},{"page":41,"tags":["spec_table"],"primary":"spec_table"},{"page":42,"tags":[],"primary":"none_of_these"},{"page":43,"tags":["product_overview","site_chrome"],"primary":"site_chrome"},{"page":44,"tags":["site_chrome"],"primary":"site_chrome"},{"page":45,"tags":["product_overview","site_chrome"],"primary":"site_chrome"},{"page":46,"tags":["site_chrome"],"primary":"site_chrome"},{"page":47,"tags":["site_chrome"],"primary":"site_chrome"},{"page":48,"tags":["site_chrome"],"primary":"site_chrome"},{"page":49,"tags":["site_chrome"],"primary":"site_chrome"},{"page":50,"tags":["site_chrome"],"primary":"site_chrome"}],"performance":[],"schema_name":"datasheet-1","part_ratings":{}},"use_cases":["mobile-robot-drive"],"commercial":{"other":{},"lifecycle":"active","checked_at":"2026-10-01T23:50:50+00:00","compliance":["RoHS 3 compliant"],"ordering_codes":[{"code":"4746","description":"Pololu item number"}]},"assembly_label":"Actuator","assembly_level":2,"search_aliases":["4746","Pololu 4746","37D 131:1 gearmotor"],"design":{"assets":[{"other":{},"kind":"datasheet","url":"https://www.pololu.com/file/0J1706/pololu-37d-metal-gearmotors.pdf","label":"Datasheet","verification":"manufacturer","notes":null,"resolved_url":"https://www.pololu.com/file/0J1706/pololu-37d-metal-gearmotors.pdf"},{"other":{},"kind":"image","url":"https://a.pololu-files.com/picture/0J10494.1200.jpg?f5b665c56025a07e4e198d8bd2d68b26","label":"Pololu #4746 131:1 37D gearmotor (no encoder)","verification":"manufacturer","notes":"inspected: maker product photo","resolved_url":"https://a.pololu-files.com/picture/0J10494.1200.jpg?f5b665c56025a07e4e198d8bd2d68b26"},{"other":{},"kind":"cad","url":"pololu-4746.step","label":"STEP (generated from datasheet drawing)","verification":"generated","notes":"cad_check passed","resolved_url":"https://wlrumvsjnliyuuvzwnrt.supabase.co/storage/v1/object/public/geometry/pololu-4746.step"}],"cad":{"verification":"generated","envelope_complete":true,"assumptions":[],"step_path":"pololu-4746.step","mesh_path":"pololu-4746.stl","footprint_svg_path":null,"bbox":{"length_mm":37,"width_mm":37,"height_mm":73},"features":[],"step_url":"https://wlrumvsjnliyuuvzwnrt.supabase.co/storage/v1/object/public/geometry/pololu-4746.step","mesh_url":"https://wlrumvsjnliyuuvzwnrt.supabase.co/storage/v1/object/public/geometry/pololu-4746.stl","footprint_svg_url":null},"limitations":["Generated geometry is an approximate mechanical envelope; inspect original manufacturer CAD when available.","Generated footprint_svg_path is an outline, not a verified electrical land pattern.","Xirkit does not run fit checks; download step_url and test fit against your own enclosure."]}}}