Publish Time: 2026-11-12 Origin: Site
The BRDC-S Series is a continuously rotating cordless torque wrench designed for controlled tightening of heavy-duty threaded connections. It should not be used to loosen fasteners, break seized joints, or perform disassembly. The tool combines a brushless battery drive, color display, preset torque control, multiple tightening programs, work-record storage, and automatic overtemperature protection. Depending on the model, the series covers torque settings from 50 N.m to 12,000 N.m.
Safe and repeatable bolting depends on more than the torque setting. The tool must match the required load, the socket and reaction arm must be secured, the output drive must remain coaxial with the fastener, and the reaction point must carry the load without slipping or deforming.
Safety notice This article is a practical overview for trained users. It does not replace official product instructions, local regulations, site procedures, joint engineering requirements, or operator training. Calibration and repair work must be performed by qualified personnel.
The tool uses an axial output structure and a motor unit that can rotate through 360 degrees for positioning. In the standard clockwise tightening configuration, the tool stops automatically when the set torque is reached. A completed torque cycle also includes an automatic reverse movement that releases load between the tool and the joint.
The color display provides access to preset torque, operating mode, work records, system information, language and unit settings, and authorized calibration functions. All listed models include temperature-controlled protective shutdown. After the tool cools, normal operation can resume if no underlying fault remains.
Main Components and Package Contents
Select the model by target tightening torque, expected break-out torque, duty cycle, square-drive size, available reaction space, and required operating speed. The model name alone is not the rated maximum. For example, BRDC-SS2000 has a maximum torque of 1,800 N.m.
Model | Square drive | Torque range N.m | Speed rpm | Weight kg |
|---|---|---|---|---|
BRDC-SS250 | 3/4 in | 50 to 250 | 35 | 3.2 |
BRDC-SS500 | 3/4 in | 100 to 500 | 12.5 | 4.0 |
BRDC-SS800 | 3/4 in | 120 to 800 | 5.0 | 4.5 |
BRDC-SS1200 | 1 in | 200 to 1,200 | 4.5 | 5.0 |
BRDC-SS2000 | 1 in | 300 to 1,800 | 3.0 | 5.3 |
BRDC-SS3000 | 1 in | 400 to 3,000 | 2.2 | 6.5 |
BRDC-SS4000 | 1 in | 600 to 4,000 | 1.8 | 6.8 |
BRDC-SS5000 | 1 1/2 in | 700 to 5,000 | 1.5 | 9.5 |
BRDC-SS6000 | 1 1/2 in | 900 to 6,000 | 1.2 | 12.5 |
BRDC-SS8000 | 1 1/2 in | 1,200 to 8,000 | 1.0 | 13.5 |
BRDC-SS12000 | 2 in | 2,000 to 12,000 | 0.7 | 18.5 |
Model | Length A mm | Gearbox width B mm | Gearbox width C mm | Overall height D mm |
|---|---|---|---|---|
BRDC-SS250 | 210 | 62 | 62 | 267 |
BRDC-SS500 | 210 | 65 | 65 | 267 |
BRDC-SS800 | 250 | 71 | 71 | 267 |
BRDC-SS1200 | 265 | 78 | 78 | 267 |
BRDC-SS2000 | 280 | 78 | 78 | 267 |
BRDC-SS3000 | 290 | 82 | 82 | 267 |
BRDC-SS4000 | 300 | 85 | 85 | 267 |
BRDC-SS5000 | 310 | 103 | 103 | 267 |
BRDC-SS6000 | 325 | 111 | 111 | 267 |
BRDC-SS8000 | 350 | 115 | 115 | 267 |
BRDC-SS12000 | 355.8 | 125 | 125 | 267 |
During intensive operation, keep the preset torque within 80 percent of the tool's full rated load. Break-out torque can be much higher than the original tightening torque and may be up to 50 percent higher depending on joint condition. Select a larger model when the expected removal load is close to the tool limit.
The standard package includes the main tool, two lithium-ion battery packs, charger, standard reaction arm, calibration certificate, operating and maintenance instructions, and Type-C data cable. Confirm the exact supplied items against the quotation and order configuration.
Item | Specification |
|---|---|
Battery voltage | 18 V |
Battery capacity | 5.2 Ah standard with 8.0 Ah or 10 Ah optional |
Recommended battery storage temperature | 5 to 30 degrees Celsius |
Charger input | AC 100 to 240 V at 50 to 60 Hz |
Charger power | 72 W |
Charger output | DC 18 V at 4 A maximum |
Charging temperature | 0 to 50 degrees Celsius |
Use only the matching original battery and charger. Do not use or charge a battery pack that is damaged, deformed, leaking, or short-circuited. Keep the battery terminals away from metal objects. The charger is for indoor use and must remain dry.
Confirm that the operator is trained, at least 18 years old, alert, and familiar with the task and its hazards.
Remove the battery before installing accessories or making mechanical adjustments.
Inspect the housing, display, trigger, direction switch, battery, charger, reaction arm, square drive, socket, retaining pin, and rubber retaining ring.
Do not use the tool if the trigger sticks, the housing or drive components are damaged, or the gearbox produces abnormal noise.
Confirm that the selected model covers the target torque and expected removal torque with adequate reserve.
Before formal operation, run the tool without load for 30 seconds at a high torque setting so the lubricant reaches a suitable working condition.
Keep the tool dry and provide rain protection. The tool and charger must not be used in an explosive atmosphere.
Slide the reaction arm fully onto the reaction spline. Seat the retaining ring securely in its groove. Some models use a locking screw instead of a retaining ring; tighten the locking screw before operation.
Push the socket fully onto the square drive and align both pin holes. Insert the retaining pin and secure it with the rubber ring. Use a socket and retaining system rated for the applied load.
Place the reaction arm flat against a rigid support that cannot slip, tilt, or deform. Use the designated load-bearing area rather than an edge or sloping surface. Keep hands, fingers, loose clothing, long hair, and cables away from the reaction and rotation zones.
The three panel buttons control value adjustment and menu confirmation. In standby, use the plus and minus buttons to set the target torque. The typical adjustment step is 1 N.m for models rated at 4,000 N.m or below and 10 N.m for models above 4,000 N.m. The buttons are locked while the tool is running to prevent accidental changes.
Operating mode | How the cycle works | Operating boundary |
|---|---|---|
Torque mode | The tool stops at the preset torque and reverses slightly to release load after a completed cycle | Keep the trigger pressed until the complete stop and release sequence finishes |
Torque plus angle mode | The tool reaches the preset torque, sets the current output position as zero degrees, and continues through the programmed angle | The live torque must remain within the selected model's maximum capacity |
Angle mode | The tool rotates through a programmed angle from a configured starting threshold | Customized function for approved processes and trained users |
If a torque plus angle or angle cycle stops before reaching the programmed angle, the torque limit may have been reached. Do not repeatedly restart the cycle. Review the joint and use a higher-capacity model when required.
In the standard configuration, clockwise tightening is controlled by the target torque, while reverse operation is not limited by that setting. Bidirectional controlled torque or reverse controlled torque can be supplied as a customized program.
Confirm the direction, operating mode, target torque, battery condition, and socket size.
Fully engage the socket with the nut or bolt head.
Keep the output drive coaxial with the fastener. Do not operate the tool at an angle.
Place the reaction arm against the approved stable support and clear the pinch zone.
Press and hold the trigger until the tool reaches the target, stops automatically, and completes its automatic load-release movement.
Remove the tool only after all rotation has stopped and the reaction load has been released.
Do not repeat the tightening cycle on a completed fastener unless the approved joint procedure specifically requires it.
Releasing the trigger before the target is reached stops the cycle immediately. An interrupted load-release movement does not resume automatically. If the tool remains loaded on the fastener, select reverse and run it briefly until the load is fully released.
Use the tool only for controlled tightening of threaded connections. Do not use it to loosen fasteners, break seized joints, or perform disassembly. Use dedicated approved removal equipment and follow the applicable site procedure for those tasks.
The display can show locally stored work records. A record can include the time stamp, preset torque, final torque, rotation angle, cycle duration, and operating mode.
The Type-C port below the display supports USB serial communication with a Windows computer. The default serial format is 115200 baud, 8 data bits, 1 stop bit, and no parity. The supplied software can export history records as a CSV file. Hardware version SZB1.60 and later provides native RS485 support. Confirm the hardware version, software version, interface, and ordered functions before integrating the tool into a data workflow.
Bluetooth data communication is an optional function identified by model suffix B. Baier Smart is the English application, while Baier Smart Control is the Chinese application. Supported functions can include command transfer, tightening-data upload, torque preset, mode setting, calibration-curve handling, and data statistics.
Wi-Fi data communication is an optional function identified by suffix W. Available functions include single-tool and multi-tool networking, reconnection, centralized command transfer, and tightening-data upload through a dual-band 5 GHz and 2.4 GHz module. The stated open-area communication distance is 100 m, with longer-range configurations available by customization.
IoT versions identified by suffix G can connect through the customer's plant access point or a BRWG-8 gateway for registration, parameter transfer, data upload, local record storage, and MES communication. These functions depend on the ordered system architecture and should be confirmed during project planning.
Remove the battery and place the tool on a clean dry level surface.
Clean dust and dirt from the ventilation openings and motor housing with a clean damp cloth or low-pressure compressed air.
Do not use solvents that attack plastic and do not allow water to enter the tool.
Inspect the reaction arm, square drive, socket, retaining parts, battery, charger, display, and housing.
Store the tool and accessories in the original case after the tool has cooled.
Store the tool dry and cool in its original case or another closed container. Remove the battery before storage. High temperature and humidity can oxidize gearbox and motor components and damage electronic parts. For long-term storage, clean the tool and protect rotating components against corrosion.
Inspect and maintain the tool at least once per year. Heavy loading, long running time, high cycle count, and harsh environments require shorter service and calibration intervals. Arrange maintenance and calibration before the tightening count reaches 5,000 cycles; the correct interval varies by model and operating condition.
Calibration must be performed by trained qualified personnel with a test system whose capacity exceeds the test torque. General operators should not change calibration or current-protection parameters. Repair work must use original parts and be performed by authorized personnel.
Stop the job, remove the battery, and arrange inspection when any of the following occurs:
the trigger sticks or does not control start and stop reliably;
the gearbox develops abnormal noise or the tool loses power;
the housing, battery, charger, reaction arm, square drive, socket, or retaining system is damaged;
the display shows a persistent alarm after the tool has cooled;
the reaction point cannot support the load safely;
the tool repeatedly reaches protective shutdown; or
smoke, fire, liquid leakage, unusual heat, or an electrical fault is detected.
In the standard clockwise tightening configuration, yes. Keep the trigger pressed until the full cycle and automatic load release are complete.
No. The support must be rigid, stable, and flat, and the arm must contact it through a suitable load-bearing area. Keep the output drive coaxial with the fastener.
The live torque may have approached or exceeded the selected model's maximum capacity. Stop and review the joint and tightening procedure. Select a higher-capacity model rather than repeatedly restarting the cycle.
Do not repeat a completed tightening cycle because it can exceed the intended torque and damage the tool or threaded connection. Follow the approved joint procedure.
Do not repeatedly reapply torque after a protective stop. Unload the reaction system, reassess the required break-out torque, and use a higher-capacity tool or another approved method.
Plan inspection and maintenance at least annually. Shorten the interval for heavy loads, long running time, frequent cycles, or harsh conditions. Use the model, running time, cycle count, load profile, and environment to set the final schedule.
Provide the following information when requesting a model recommendation or quotation:
target tightening torque and expected break-out torque;
bolt size socket size and joint type;
required tightening method including torque or torque plus angle;
available reaction space and clear site photographs;
daily cycle count duty profile and ambient temperature;
battery and charger requirements;
data export Bluetooth WiFi RS485 gateway or MES requirements; and
language documentation calibration and service requirements.
Contact the Baier technical team for model selection, reaction-arm configuration, communication options, and maintenance planning.
Baier Hydraulic Power (Wuhan) Co. Ltd is a high-technology enterprise, the company has been keenly focused on integrating research, development, production, sale and service of torque wrench, hydraulic cylinders, nut cutter, hydraulic pullers, hydraulic pumps, and so on. We own a modern production plant of 12, 000 square meters, this incorporates an internationally advanced hydraulic tools production facility, material processing line, tools assembly line, and other packaging equipment facilities.