{"id":1148,"date":"2026-08-21T06:36:20","date_gmt":"2026-08-21T06:36:20","guid":{"rendered":"https:\/\/superiortransmissioninc.com\/?page_id=1148"},"modified":"2026-08-21T07:45:27","modified_gmt":"2026-08-21T07:45:27","slug":"tarpaulin-motor","status":"publish","type":"page","link":"https:\/\/superiortransmissioninc.com\/kk\/tarpaulin-motor\/","title":{"rendered":"Tarpaulin Motor"},"content":{"rendered":"

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DC Motor Series \u2014 Complete Guide<\/h4>\n

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Tarpaulin Motor<\/h1>\n

[\/et_pb_text][et_pb_button button_url=”https:\/\/superiortransmissioninc.com\/contact-us\/” button_text=”Request A Quote” _builder_version=”4.20.4″ _module_preset=”49350538-ea1a-4316-86e9-ea7f9b41d8fb” global_colors_info=”{}”][\/et_pb_button][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.20.4″ _module_preset=”default” background_enable_image=”off” custom_padding=”||||false|false” global_colors_info=”{}”][et_pb_image src=”https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/08\/superiortransmissioninc-product-EP-900W-24V-Tarpaulin-Motor-for-Dump-Truck-With-Reducer.webp” alt=”superiortransmissioninc-product-EP-900W 24V Tarpaulin Motor for Dump Truck With Reducer” title_text=”superiortransmissioninc-product-EP-900W 24V Tarpaulin Motor for Dump Truck With Reducer” _builder_version=”4.20.4″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ admin_label=”About” _builder_version=”4.20.4″ _module_preset=”default” background_color=”#000000″ custom_padding=”1px||||false|false” collapsed=”on” global_colors_info=”{}”][et_pb_row column_structure=”2_5,3_5″ custom_padding_last_edited=”on|tablet” _builder_version=”4.24.0″ _module_preset=”default” custom_margin=”-12vw||||false|false” custom_margin_tablet=”0vw||||false|false” custom_margin_last_edited=”off|tablet” custom_padding=”|70px|||false|false” custom_padding_tablet=”|0px|||false|false” custom_padding_phone=”” global_colors_info=”{}”][et_pb_column type=”2_5″ _builder_version=”4.24.0″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_column][et_pb_column type=”3_5″ _builder_version=”4.24.0″ _module_preset=”default” background_color=”gcid-9bb9bfe2-980a-472b-9544-d767cdb4022e” custom_padding=”40px|40px|40px|40px|true|true” global_colors_info=”{%22gcid-9bb9bfe2-980a-472b-9544-d767cdb4022e%22:%91%22background_color%22%93}”][et_pb_text _builder_version=”4.20.4″ _module_preset=”bfb2c37b-3650-4d19-ac93-3e0e407ad593″ header_2_text_color=”#FFFFFF” global_colors_info=”{}”]<\/p>\n

\u0411\u0456\u0437\u0431\u0435\u043d \u0445\u0430\u0431\u0430\u0440\u043b\u0430\u0441\u044b\u04a3\u044b<\/h2>\n

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sales@superiortransmissioninc.com<\/a><\/h3>\n

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\u0410\u00a0tarpaulin motor<\/strong>\u00a0\u2014 often called a tarp motor \u2014 is a purpose-built DC electric motor designed to power the automated cover systems fitted to dump trucks, tipper trailers, and bulk material transport vehicles. Rather than manually deploying a heavy canvas or synthetic tarp across an open load bed, the tarpaulin motor drives a mechanical roll-out or swing-arm mechanism from the vehicle cab, extending or retracting the cover at the press of a button.<\/p>\n

What sets a tarp motor apart from a general-purpose DC motor is its application-specific engineering: it must tolerate high starting torque demands, intermittent duty cycles matched to cover actuation patterns, outdoor ingress protection against rain and dust, and in many cases multi-voltage compatibility to fit a wide range of truck electrical systems. The result is a motor that looks deceptively simple but is precisely tuned for the unique stress profile of commercial vehicle tarpaulin systems.<\/p>\n

Across markets including Australia, the UK, North America, the Netherlands, and South Korea, road regulations increasingly mandate covered loads for aggregate, soil, and demolition debris transport. This regulatory pressure \u2014 combined with driver convenience and load protection benefits \u2014 has made the electric tarpaulin motor a standard fitment on modern commercial dump trucks rather than an optional upgrade.<\/p>\n

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Tarpaulin Motor Types<\/h2>\n

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Full Range Specification Comparison<\/h2>\n

The table below gives a side-by-side view of all four tarpaulin motor configurations, making it straightforward to identify the right model for your application based on power, torque, duty cycle, and protection level.<\/pee> <\/p>\n

<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n
\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440<\/th>\n

<\/p>\n

600W 24V<\/th>\n

<\/p>\n

900W 24V<\/th>\n

<\/p>\n

900W 24V + Reducer<\/th>\n

<\/p>\n

1200W 24V<\/th>\n

<\/tr>\n

<\/thead>\n

<\/p>\n

Rated Voltage<\/td>\n

<\/p>\n

24V<\/td>\n

<\/p>\n

24V<\/td>\n

<\/p>\n

24V<\/td>\n

<\/p>\n

24V<\/td>\n

<\/tr>\n

<\/p>\n

\u041d\u043e\u043c\u0438\u043d\u0430\u043b\u0434\u044b \u049b\u0443\u0430\u0442<\/td>\n

<\/p>\n

600W<\/td>\n

<\/p>\n

900W<\/td>\n

<\/p>\n

900W<\/td>\n

<\/p>\n

1200W<\/td>\n

<\/tr>\n

<\/p>\n

Rated Current<\/td>\n

<\/p>\n

30A<\/td>\n

<\/p>\n

45A<\/td>\n

<\/p>\n

45A<\/td>\n

<\/p>\n

50A<\/td>\n

<\/tr>\n

<\/p>\n

Rated Torque<\/td>\n

<\/p>\n

1.5 N\u00b7m<\/td>\n

<\/p>\n

4 N\u00b7m<\/td>\n

<\/p>\n

4 N\u00b7m (+ reduction)<\/td>\n

<\/p>\n

5 N\u00b7m<\/td>\n

<\/tr>\n

<\/p>\n

Duty Cycle<\/td>\n

<\/p>\n

S2 1min\u201310%ED<\/td>\n

<\/p>\n

S2 3min\u201330%ED<\/td>\n

<\/p>\n

S2 3min\u201330%ED<\/td>\n

<\/p>\n

S2 3min\u201330%ED<\/td>\n

<\/tr>\n

<\/p>\n

Insulation Class<\/td>\n

<\/p>\n

Class F<\/td>\n

<\/p>\n

Class F<\/td>\n

<\/p>\n

Class F<\/td>\n

<\/p>\n

Class F<\/td>\n

<\/tr>\n

<\/p>\n

IP Rating<\/td>\n

<\/p>\n

IP54<\/td>\n

<\/p>\n

IP67<\/td>\n

<\/p>\n

IP67<\/td>\n

<\/p>\n

IP67<\/td>\n

<\/tr>\n

<\/p>\n

Alt. Voltages<\/td>\n

<\/p>\n

12V \/ 900W<\/td>\n

<\/p>\n

12V\/48V\/60V\/72V<\/td>\n

<\/p>\n

12V<\/td>\n

<\/p>\n

12V\/48V\/60V\/72V<\/td>\n

<\/tr>\n

<\/p>\n

Integrated Reducer<\/td>\n

<\/p>\n

No<\/td>\n

<\/p>\n

No<\/td>\n

<\/p>\n

Yes (worm type)<\/td>\n

<\/p>\n

No<\/td>\n

<\/tr>\n

<\/p>\n

Best For<\/td>\n

<\/p>\n

Light vehicles, short covers<\/td>\n

<\/p>\n

Standard dump trucks<\/td>\n

<\/p>\n

Wide\/heavy covers<\/td>\n

<\/p>\n

Large-body, cold climate<\/td>\n

<\/tr>\n

<\/tbody>\n

<\/table>\n

<\/div>\n

<\/div>\n

<\/p>\n

<\/div>\n

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DC voltage from the truck battery (12V, 24V, 48V, or higher) is supplied to the motor terminals via a cab-mounted switch or solenoid relay box.<\/p>\n

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Current through the armature winding creates a rotating magnetic field. The permanent stator magnets exert force on this field, rotating the armature shaft.<\/p>\n

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An optional integrated worm reducer multiplies output torque and reduces shaft speed \u2014 important for wide or heavy tarp covers that require more pulling force at the drive point.<\/p>\n

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The output shaft drives the tarp roller tube or crank arm, moving the cover across the load body. Reversing current polarity from the cab sends the cover back in the opposite direction.<\/p>\n

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Find the Right Tarpaulin Motor for Your Vehicle<\/h2>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”2_3,1_3″ _builder_version=”4.24.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”2_3″ _builder_version=”4.20.0″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.20.4″ _module_preset=”default” text_font=”Saira|700|||||||” global_colors_info=”{}”]<\/p>\n

Whether you’re replacing a failed unit, upgrading an existing tarp system, or specifying motors for a new fleet build \u2014 our engineering team can help confirm the correct voltage, torque, and fitment configuration for your application. Send us your vehicle details and tarp cover dimensions, and we’ll recommend the right model from the range.<\/p>\n

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Permanent Magnets (Stator)<\/h3>\n

Sintered neodymium-iron-boron (NdFeB) magnets fixed inside the stator housing create the static magnetic field the armature rotates against. NdFeB grade maintains flux density across tens of thousands of start-stop cycles without measurable demagnetisation \u2014 a significant advantage over lower-grade ferrite magnets used in budget alternatives.<\/pee> <\/div>\n

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Armature Winding<\/h3>\n

Precision-wound enamelled copper wire coils mounted on the rotating armature core. The wire grade \u2014 typically Class F for quality tarpaulin motors \u2014 defines the maximum sustained temperature the winding can tolerate (155\u00b0C for Class F) before insulation breakdown risk increases.<\/pee> <\/div>\n

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Commutator & Brushes<\/h3>\n

The commutator is a segmented copper ring on the armature shaft. Carbon brushes press against it, carrying current into the rotating armature and switching which coil receives current as the shaft rotates. Brush condition is the primary maintenance item in a brushed DC tarpaulin motor \u2014 periodic inspection and replacement when worn extends motor service life significantly.<\/pee> <\/div>\n

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Motor Housing (Shell)<\/h3>\n

Die-cast aluminium alloy in most quality tarpaulin motors \u2014 chosen for its strength, corrosion resistance, and thermal conductivity. The housing carries the IP rating (IP54 or IP67 depending on the model), which is the practical indicator of how well the motor is protected from the water and dust that dump truck environments generate continuously.<\/pee> <\/div>\n

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Output Shaft & Bearings<\/h3>\n

A medium-carbon steel shaft, hardened and ground to precise dimensional tolerances, transmits torque to the tarp drive mechanism. Deep-groove ball bearings at each end of the shaft carry combined radial and axial loads, sealed against contamination ingress.<\/pee> <\/div>\n

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Key Components of a Tarpaulin Motor<\/h2>\n

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Integrated Reducer (Optional)<\/h3>\n

Some tarpaulin motor models incorporate a worm gear reducer inside the same housing. The worm shaft is hardened steel; the worm wheel is typically phosphor bronze, chosen for its self-lubricating properties and compatibility with steel under the boundary lubrication conditions inside a sealed gearbox cavity.<\/pee> <\/div>\n

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Installation & Maintenance Essentials<\/h2>\n

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A tarpaulin motor is only as reliable as its installation. Errors made at fitment stage \u2014 undersized wiring, loose terminal connections, or incorrect shaft alignment \u2014 are the most common causes of early motor failure, and almost all are preventable with a few straightforward checks during installation and periodic inspection during service.<\/h4>\n

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The cable running from the solenoid relay to the motor terminals must be rated for the motor’s full-load current \u2014 45A for the 900W model, 50A for the 1200W model. Undersized cable creates resistance, heat, and voltage drop that reduces torque and accelerates terminal corrosion. Use the shortest practical cable run and confirm all connections are tight, clean, and protected from vibration-induced fatigue.<\/p>\n

[\/et_pb_blurb][et_pb_blurb title=”Respect the Duty Cycle” image_icon_width=”48px” icon_alignment=”left” content_max_width=”100%” image_last_edited=”off|desktop” _builder_version=”4.20.4″ _module_preset=”default” header_font=”Inter|700|||||||” header_text_color=”#000000″ header_font_size=”17px” header_line_height=”1.4em” body_font=”Saira||||||||” body_text_color=”#000000″ body_line_height=”1.6em” animation=”off” header_font_size_tablet=”16px” header_font_size_phone=”14px” header_font_size_last_edited=”on|desktop” locked=”off” global_colors_info=”{}” image__hover_enabled=”off|hover” header_text_color__hover=”#FFFFFF” header_text_color__hover_enabled=”off|hover” body_text_color__hover=”#FFFFFF” body_text_color__hover_enabled=”off|hover”]<\/p>\n

The S2 rating tells you exactly how long you can run the motor at full load in any given period. Running the motor longer than the rated on-time \u2014 repeatedly opening and closing to troubleshoot a drive mechanism problem, for example \u2014 generates winding temperatures that degrade insulation and shorten brush life. If the cover isn’t moving properly, diagnose the mechanical system before running the motor further.<\/p>\n

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Brushes in a well-maintained tarpaulin motor should last several years under normal duty cycle use, but annual visual inspection is good practice \u2014 particularly for high-cycle applications like municipal waste collection. Replace brushes when worn to the minimum length mark; continuing to run worn brushes arcs the commutator surface and significantly increases replacement cost.<\/p>\n

[\/et_pb_blurb][et_pb_blurb title=”Check Shaft Alignment” image_icon_width=”48px” icon_alignment=”left” content_max_width=”100%” image_last_edited=”off|desktop” _builder_version=”4.20.4″ _module_preset=”default” header_font=”Inter|700|||||||” header_text_color=”#000000″ header_font_size=”17px” header_line_height=”1.4em” body_font=”Saira||||||||” body_text_color=”#000000″ body_line_height=”1.6em” animation=”off” header_font_size_tablet=”16px” header_font_size_phone=”14px” header_font_size_last_edited=”on|desktop” locked=”off” global_colors_info=”{}” image__hover_enabled=”off|hover” header_text_color__hover=”#FFFFFF” header_text_color__hover_enabled=”off|hover” body_text_color__hover=”#FFFFFF” body_text_color__hover_enabled=”off|hover”]<\/p>\n

Misalignment between the motor output shaft and the tarp drive input increases bearing load, accelerates wear, and generates vibration that loosens mounting bolts over time. When installing a replacement motor, verify the shaft centreline matches the drive mechanism centreline before torquing the mounting flange bolts. A small misalignment that is barely visible to the eye can halve bearing service life.<\/p>\n

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How to Choose the Right Tarpaulin Motor<\/h2>\n

Selecting a tarpaulin motor that is correctly matched to the application avoids the two most common failure scenarios: an undersized motor that stalls and burns out under tarp load, or an oversized motor that wastes installation space and electrical capacity without providing any real-world benefit. Work through these five selection criteria in order:<\/pee> <\/p>\n

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1<\/span> <\/p>\n
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Match the Supply Voltage<\/h3>\n

Identify your truck’s battery system voltage before anything else. Most commercial dump trucks run 24V systems; some lighter vehicles use 12V. Mismatching voltage \u2014 even by running a 24V motor at 12V \u2014 dramatically reduces torque output and can cause erratic behaviour. Our range covers 12V, 24V, 48V, 60V, and 72V configurations.<\/pee> <\/div>\n

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2<\/span> <\/p>\n
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Estimate the Required Torque<\/h3>\n

Tarp cover width, cover weight, and the mechanical advantage of the drive arm or roller all affect how much torque the motor needs to deliver. A narrow lightweight cover on a small tipper might work fine with 1.5 N\u00b7m. A wide, heavy canvas cover on a large aggregate truck may need 4\u20135 N\u00b7m \u2014 or the geared version of the same motor to multiply available torque.<\/pee> <\/div>\n

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3<\/span> <\/p>\n
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Assess the Operating Environment<\/h3>\n

IP54 protection covers rain splash and heavy dust \u2014 sufficient for most cab-sheltered motor mounting positions. If the motor will be fully exposed to direct water jets during vehicle washing, or is mounted under the body where wheel spray is direct, choose IP67. Coastal operators and those working in consistently wet climates (UK, New Zealand, Queensland) should always specify IP67.<\/pee> <\/div>\n

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4<\/span> <\/p>\n
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Check Physical Fitment<\/h3>\n

Motor outer diameter, overall length, flange bolt pattern, and output shaft diameter all determine whether the motor physically fits the existing mounting bracket and connects to the tarp drive mechanism without fabrication. For direct replacement jobs, these dimensions must match the existing unit. For new installations, confirm the drive mechanism’s shaft bore matches the motor’s output shaft diameter.<\/pee> <\/div>\n

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5<\/span> <\/p>\n
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Do You Need an Integrated Reducer?<\/h3>\n

If the tarp drive mechanism has its own gearbox, a bare motor is the right choice. If the drive system is direct \u2014 the motor shaft connects with little or no mechanical reduction \u2014 choose the version with integrated reducer to gain the torque multiplication the tarp cover needs. The with-reducer version also adds self-locking: the worm gear prevents the cover from back-driving when the motor is off.<\/pee> <\/div>\n

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DC Motor Series \u2014 Complete GuideTarpaulin MotorContact ussales@superiortransmissioninc.comA\u00a0tarpaulin motor\u00a0\u2014 often called a tarp motor \u2014 is a purpose-built DC electric motor designed to power the automated cover systems fitted to dump trucks, tipper trailers, and bulk material transport vehicles. Rather than manually deploying a heavy canvas or synthetic tarp across an open load bed, the […]<\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-1148","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/superiortransmissioninc.com\/kk\/wp-json\/wp\/v2\/pages\/1148","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/superiortransmissioninc.com\/kk\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/superiortransmissioninc.com\/kk\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/kk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/kk\/wp-json\/wp\/v2\/comments?post=1148"}],"version-history":[{"count":8,"href":"https:\/\/superiortransmissioninc.com\/kk\/wp-json\/wp\/v2\/pages\/1148\/revisions"}],"predecessor-version":[{"id":1200,"href":"https:\/\/superiortransmissioninc.com\/kk\/wp-json\/wp\/v2\/pages\/1148\/revisions\/1200"}],"wp:attachment":[{"href":"https:\/\/superiortransmissioninc.com\/kk\/wp-json\/wp\/v2\/media?parent=1148"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}