Industrial Testing Equipment · Material Testing Machines
Bench calibrator for torque wrenches from 1 to 5000 N·m, with a lever loading arm, height and length adjustment, peak hold and an RS232 link.
HB-10N (6 models) ·
A torque wrench is a measuring instrument that is itself measured, and the fixture it is checked on decides whether the result means anything. A lever that loads the handle at a controlled rate, with the drive held level on a reaction head, is what separates a calibration from a pull against a stop.
The calibrator is a bench frame: a sensor head at one end, a horizontal beam that carries the load, and a handwheel that turns a screw to apply it. The wrench sits on the head with its drive engaged, its handle resting on the beam, and the height and length adjusters bring it level and square before the load goes on.
The range is built in twelve single-range sizes, so a workshop that calibrates small torque screwdrivers and a workshop that calibrates one-inch wrenches use the same fixture with a different head. The dual-range versions cover a decade in one body, switching between a high and a low range.
The sensor is a strain-gauge bridge in the reaction head. The handwheel turns a screw that pulls the beam, the beam loads the wrench handle, and the wrench applies the torque to the sensor through its drive. Because the load is applied by a screw rather than by hand, the rate is set by how fast the wheel is turned and can be repeated.
The instrument holds the peak. A click-type wrench releases at its setting, so the torque falls away as soon as the mechanism trips; the value worth recording is the top of the rise. The hold time keeps that value on the display after the release, which is what allows one person to run the calibration alone.
The alarm limit turns the reading into a decision. Where the wrench has to be within a tolerance of its setting, the limit is entered from the keypad and the display reports pass or fail without the operator doing arithmetic.
Size the instrument to the wrenches, not to the largest one in the building. A head that is chosen for the biggest wrench will measure the small ones near the bottom of its scale, where the reading is coarsest, and a workshop with both ends of the range is better served by a dual-range body or by two heads.
Check the physical fit before the range. The beam has to accept the handle, the head has to accept the drive, and the height adjuster has to bring the wrench level; a wrench that hangs below the beam loads the head at an angle and reads low.
Decide how the result is kept. A workshop that calibrates its own tools needs the peak hold and the alarm; a calibration laboratory that issues certificates needs the interface, the command set and a record of the reading.
Then decide on the display. The five-digit LED is read at a glance from a bench; the colour touch panel is for a station where settings are entered and changed often rather than read once.
The calibrator measures the torque at the drive, not the torque at the fastener. Joint friction, extension bars and adaptors all sit between the two, so a wrench calibrated here and used on a lubricated thread applies a different torque to the joint than the dial suggests.
The load rate matters for a click-type wrench. A fast pull trips the mechanism early and reads low, which is why the handwheel and a consistent turning speed are part of the method rather than a convenience. The material gives a hold time but no loading rate, so the rate has to be established by the user’s procedure.
For a wrench that is checked in the field rather than on a bench, a portable comparator with a transducer in line with the drive is the right instrument; this fixture assumes the wrench can be brought to it. And for a screwdriver clutch, the reaction-head tester used with the tool held on an adaptor measures the same quantity at a much smaller scale, which is a different fixture rather than a smaller version of this one.
Every value below is taken from source documentation. Where a parameter is not stated in the available material it is marked as information required rather than estimated.
| Range, HB-10N | 1.00 to 10.00 N·m / 10.0 to 100.0 kgf·cm / 10.0 to 90.0 lbf·inStandard |
|---|---|
| Range, HB-100N | 10.0 to 100.0 N·m / 100 to 1000 kgf·cm / 100 to 900 lbf·inStandard |
| Range, HB-500N | 50.0 to 500.0 N·m / 500 to 5000 kgf·cm / 500 to 4500 lbf·inStandard |
| Range, HB-1000N | 100.0 to 1000.0 N·m / 1000 to 10000 kgf·cm / 1000 to 9000 lbf·inStandard |
| Range, HB-3000N | 300.0 to 3000.0 N·m / 3000 to 30000 kgf·cm / 3000 to 27000 lbf·inStandard |
| Range, HB-5000N | 500.0 to 5000.0 N·m / 5000 to 50000 kgf·cm / 5000 to 45000 lbf·inStandard |
| Capacities in the single-range family | Twelve, spanning 1 to 10 N·m and 500 to 5000 N·m; the six listed here are the ones carried in the model fieldStandard |
| Accuracy | ±1.0%Standard |
| Measurement modes | TRACK for a live reading and zeroing; PEAK for the held maximumStandard |
| Units | N·m, kgf·cm and lbf·in, three-position switchStandard |
| Direction indication | Clockwise and counter-clockwise, shown as a signStandard |
| Reference standard | Not stated in the materialInformation required |
| 2HB series | Two ranges in one instrument, for example 10 to 100 N·m and 1 to 10 N·mOptional |
|---|---|
| 2HBS series | The same two ranges on the colour touch displayOptional |
| Dual-range sizes | 100/10, 200/20, 300/30, 400/40 and 500/50 N·mStandard |
| Display | Five-digit LED; colour LCD with touch input on the colour seriesStandard |
|---|---|
| Alarm setting | Upper limit entered by key, highest digit edited firstStandard |
| Peak hold time | 0.0 to 3.0 s, with 0.0 s giving the longest holdStandard |
| Viewing angle | Display set at an angle to the operatorStandard |
| Supply | AC 220 to 240 V, 50 HzStandard |
|---|---|
| Interface | RS232, for recording and printingStandard |
| Command set | SCPI, for remote control and data collection without the front panelStandard |
| Structure | Torque sensor head, horizontal load beam, height adjustment and a drive handwheelStandard |
|---|---|
| Wrench positioning | Height knob levels the wrench; the length and direction knobs set it to the arm length of the wrenchStandard |
| Body dimensions | Not stated in the materialInformation required |
| Weight | Not stated in the materialInformation required |
| Standard accessory | LK26010AStandard |
|---|---|
| Supplied with the body | Mains lead, sensor reaction head and fixture parts, as packedStandard |
| Accessory content | Names, quantities and the drives each part fits are not stated in the materialInformation required |
| Model | Configuration | Key ranges | Availability |
|---|---|---|---|
| HB-10N | Single range, five-digit LED | 1.00 to 10.00 N·m / 10.0 to 100.0 kgf·cm / 10.0 to 90.0 lbf·in | The smallest size named in the source folder |
| HB-100N | Single range, five-digit LED | 10.0 to 100.0 N·m / 100 to 1000 kgf·cm / 100 to 900 lbf·in | |
| HB-500N | Single range, five-digit LED | 50.0 to 500.0 N·m / 500 to 5000 kgf·cm / 500 to 4500 lbf·in | |
| HB-1000N | Single range, five-digit LED | 100.0 to 1000.0 N·m / 1000 to 10000 kgf·cm / 1000 to 9000 lbf·in | |
| HB-3000N | Single range, five-digit LED | 300.0 to 3000.0 N·m / 3000 to 30000 kgf·cm / 3000 to 27000 lbf·in | |
| HB-5000N | Single range, five-digit LED | 500.0 to 5000.0 N·m / 5000 to 50000 kgf·cm / 5000 to 45000 lbf·in | The largest size named in the source folder; like several other large sizes, it appears in the selection table but not in the technical table |
Certifications are only published once a certificate copy can be produced, so this section is deliberately empty rather than populated with assumed approvals. Tell us which approvals your application requires and we will confirm what is available for this instrument.
The following are required for a complete specification but are not stated in the documentation supplied to us. They are listed rather than estimated:
By a handwheel turning a lever against the wrench handle, so the load rises smoothly rather than in a step. A wrench that is loaded by hand against a rigid stop reads a peak that depends on how fast the operator pulls; the lever removes that variable, which is the difference between a calibration and a check.
When the same bench calibrates wrenches at both ends of a decade and has no room for two fixtures. The dual-range body switches between a high and a low range, so a 10 to 100 N·m wrench and a 1 to 10 N·m wrench can both be checked on one sensor head. Where the workload sits at one end, a single-range size gives the same accuracy with fewer settings to get wrong.
The torque range of the wrenches to be calibrated and their drive sizes, whether a single range or a dual range is wanted, whether the colour display is needed, and whether results have to be sent to a computer. The physical size of the largest wrench also matters, since the beam has to accept its handle length.
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