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Custom Tool Tray for Bolting in Hard-to-Reach Areas

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Difficult Bolting Applications Require Custom Solutions

Some bolting jobs become difficult before the tool ever reaches the fastener. Tight clearances, overhead obstructions, and the weight of larger hydraulic tools can make simply getting the equipment into position one of the hardest parts of the job.

Winshaw ran into that problem on a project where a heavy bolting tool needed to be positioned over a fastener, but an overhang ruled out the usual overhead lifting methods. Instead of suspending the tool from above, Winshaw developed a custom tray that supported and positioned it from underneath.

Why the Usual Lifting Method Wouldn’t Work

The fastener was located beneath an overhang, leaving no practical place for a winch, tool balancer, or other overhead support.

That mattered because the bolting tool was too heavy to treat positioning as a simple hand-lifting job. The operator needed a way to bring the tool into position, hold it there during the bolting operation, and remove it without repeatedly handling the full weight.

A support system underneath the tool solved that problem.

How Winshaw’s Custom Tray Worked

Winshaw designed the tray so the bolting tool could rest on a supported platform beneath the fastener.

The operator could bring the tool into position, raise it until it lined up with the nut, and lower it into place without carrying the tool’s weight by hand. Once the bolting work was complete, the tray could lift the tool away and move on to the next fastener.

That same motion could then be repeated across multiple bolting locations.

What Matters in the Tray Design

The tray has to do more than simply hold the tool.

  • Tool support: The tray and its mounting need to handle the weight of the tool and the loads created while it is being positioned.
  • Alignment: Guides, locating points, or pins can help bring the tool back to the same position over each fastener.
  • Vertical movement: The lifting method needs enough travel to place and remove the tool without running out of clearance.
  • Restraint: The tool needs to remain secure while torqueing or tensioning work is underway.
  • Hose routing: Hydraulic hoses and other connections need a path that keeps them away from pinch points and surrounding structure.
  • Service access: Wear points and working components should still be reachable for inspection and maintenance.
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Depending on the application, vertical movement may be mechanical, hydraulic, or pneumatic. The right setup depends on the tool, available space, required travel, and how often the operation will be repeated.

What Changed for the Crew on Site

The biggest difference was that the bolting tool no longer had to be repeatedly supported by hand.

  • The tool could be brought back to the same working position from one fastener to the next.
  • Operators spent less time physically handling the tool’s full weight.
  • The tray provided a workable option in an area where overhead lifting equipment could not be installed.
  • The tool stayed supported between bolting points instead of being lifted and repositioned from scratch each time.

That made the tray useful not only for one difficult fastener, but for a series of repeated bolting operations in the same restricted area.

Planning a Support Tray for a Bolting Job

A custom tray starts with the actual space around the fastener.

  • The tool’s weight may not sit evenly on the tray. Mark the area carrying the load so the support can be built around the way the tool actually rests.
  • Around the fastener, the overhang is what sets the working envelope. Use that narrowest clearance as the dimension the tray has to work within.
  • With the tool lined up over the nut, record how much lift is needed to seat it and how far it has to rise before it can move away cleanly.
  • Decide how the tool will be guided into the same position each time.
  • Identify how the tool will be restrained during the bolting operation.
  • Check hose and connection routing through the entire travel range.
  • Leave access for inspection and maintenance wherever possible.

Photos can help, but detailed measurements are usually what determine whether the idea will work once steel is fabricated.

Build Around the Actual Work Area

One of the easiest mistakes with a custom fixture is designing around the tool while overlooking everything surrounding it.

A tray may have enough capacity to hold the equipment and still fail to fit between nearby structure. The same problem can happen with hose connections, handles, reaction points, or the extra clearance needed to lift the tool away after the bolting cycle.

That is why the work envelope needs to be measured before fabrication begins.

custom tray for positioning heavy-duty bolting tools

Planning Checklist for the Site

  • Confirm tool weight and center of gravity relative to the tray support points.
  • Measure nearby structure and the available clearance around the fastener.
  • Record the vertical travel needed to install and remove the tool.
  • Identify the locating points needed to bring the tool back into alignment.
  • Determine what locking or restraint features are required during operation.
  • Map hydraulic hose and connection routing before finalizing the tray.
  • Make sure inspection points remain accessible once the tray is installed.

A stubborn or hard-to-reach bolting location does not always require a different bolting tool. Sometimes the better answer is changing how the existing tool is supported and positioned.

For tool-specific guidance on accuracy and maintenance, see Hydraulic torque wrench tolerances and How often should you calibrate and/or certify your torque tool. For additional bolting guidance, see considerations when using hydraulic bolt tensioners.

Build Around the Overhang

On this job, the overhang above the fastener set the limit. Before cutting steel, Winshaw needed to know how much room the tray had underneath it and how far the tool had to lift to clear the nut. If the site cannot be reviewed in person, photos with a tape measure in the frame can capture those dimensions.

From there, Winshaw can review the application, develop a concept for supporting the tool, and work through how the fixture will be used and inspected once it is on site.

Contact Winshaw for Custom Bolting Support

If you have a bolting application where access, tool weight, or surrounding structure is making the job difficult, email sales@winshawllc.com.

Include the fastener size, tool being used, available clearance, and a few photos or measurements of the work area. That gives Winshaw a better starting point for determining whether a custom tray or other support fixture makes sense for the application.

What is the difference between calibration and certification

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Quick answer: The difference between calibration and certification is that calibration compares an instrument toCalibration and Certification Are Not the Same Thing

A tool can be calibrated and still need additional documentation before it is ready to go back into service. Calibration is the testing itself—comparing the tool against a known reference. The certificate is the record of those results and can also show whether the tool met a required tolerance when that evaluation is part of the service.

The two terms get used interchangeably in shops, but they are not quite the same thing. That difference matters when you are sending out a torque tool, pressure gauge, or other measuring equipment and need more than a simple service record when it comes back.

What Is Calibration?

Calibration is the actual measurement process.

The instrument is compared with a known reference under controlled conditions, and the readings are recorded. Those numbers show how closely the tool agrees with the reference and whether any error or drift has developed.

Calibration does not automatically mean the tool was adjusted or repaired.

For example, a calibration may show that a gauge is outside its required tolerance. That tells you there is a problem, but correcting it is another step. The gauge may need an adjustment, repair, or replacement component before it is tested again.

Once that work is finished, another calibration can show how the instrument is performing after the correction.

What Is Certification?

Certification usually refers to the paperwork that comes out of the calibration process.

A calibration certificate can include the test points, actual readings, reference information, measurement uncertainty, and other details from the service. If the customer requires it, the certificate may also state whether the tool met a specific tolerance or acceptance requirement.

The certificate is the record. The calibration is the measurement work behind it.

That distinction becomes important when a company needs documentation for an audit, customer requirement, internal quality program, or regulated job.

Practical Example: The 100 PSI Gauge

Consider a 100 PSI pressure gauge rated at ±1% of full scale. On that gauge, the allowable error would be ±1 PSI.

Now imagine the gauge is sitting at 20 PSI with no pressure applied.

Something is clearly wrong, but moving the pointer back to zero is not the same thing as calibrating the gauge.

The first step is figuring out why the gauge is reading incorrectly. It may need an adjustment or repair. After that work, the gauge can be checked against a known pressure reference at several points across its range.

If those readings fall within the required ±1 PSI tolerance at the specified test points, the results can be recorded on the calibration certificate.

When a statement of conformity is required, the documentation can also show whether the gauge met the defined acceptance requirements.

That tells the customer much more than simply knowing someone moved the pointer back to zero.

Why the Difference Matters

The wording on a service request can change what happens to the tool.

If you request calibration, the service may be limited to checking and documenting the instrument’s performance against a reference. If the tool is outside tolerance, an adjustment or repair may have to be authorized separately.

If your quality system also requires a certificate, pass/fail result, or statement of conformity, that needs to be clear before the work begins.

Sorting that out up front can prevent a tool from coming back with test results but without the paperwork your company actually needs.

What May Be Included on a Calibration Certificate

Depending on the service and the customer’s requirements, the documentation may include:

  • Instrument type, model, and serial number.
  • Calibration or service date and, when applicable, the next due date.
  • Test points and recorded results.
  • As-found and as-left readings, when applicable.
  • Information about the reference standards or traceability used.
  • Measurement uncertainty, when required.
  • A pass/fail result or statement of conformity when acceptance criteria have been defined.
  • Identification of the technician or laboratory performing the work.
  • Notes covering adjustments, repairs, or other service completed.

Before You Send the Tool Out

A little information up front can save several calls later.

  • Include the model and serial number when available.
  • State whether you need calibration only or whether adjustment and repair should be performed if needed.
  • Specify whether a calibration certificate is required.
  • Tell the service provider if you need a pass/fail result or statement of conformity to a particular specification.
  • Include previous calibration records when they are relevant.
  • Mention anything unusual you have noticed, such as leaks, impacts, erratic readings, or visible damage.
  • Confirm the expected turnaround time and any documentation required by your quality system.

How Often Should a Tool Be Calibrated?

There is not one interval that fits every tool.

A hydraulic torque wrench used constantly in demanding field work may need to be checked more often than a tool that spends most of its time in controlled service. Previous calibration history matters too. So do impacts, overloads, working conditions, and the importance of the measurement being made.

Company procedures, customer requirements, and regulatory standards can also set the interval.

For more information on building a schedule, see How often should you calibrate and/or certify your torque tool.

Documentation and Tolerances

A calibration certificate records what the instrument did during testing.

That is different from saying the tool passed.

To make a pass/fail decision, there needs to be a defined tolerance or acceptance requirement to compare those readings against. Without that requirement, the certificate may simply document the measured results.

For more information on torque-tool and gauge tolerances, see What are the accepted tolerances for Hydraulic Torque tools.

Need calibration, certification, or service?

If you are unsure what your tool needs, the first step is determining whether you need measurement results, an adjustment or repair, formal documentation, or a combination of those services.

Winshaw can assist with tool and gauge calibration, documentation, and service needs to help keep equipment operating within the required specifications. For problems that may need to be corrected before calibration, see our troubleshooting guide: Hydraulic torque wrench troubleshooting — What’s wrong with my wrench?

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Hydraulic torque wrench tolerances — Accepted tolerances for hydraulic torque tools

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Hydraulic Torque Wrench Tolerances: What Does ±3% Mean?

A hydraulic torque wrench is only useful if the torque it delivers stays within the accuracy required for the job. For many hydraulic torque tools, ±3% is commonly used as an accuracy guideline, although the manufacturer’s stated tolerance and any project requirements should always be the final reference.

For example, if a wrench is expected to produce 1,000 ft·lb, a ±3% tolerance would put the acceptable range between 970 and 1,030 ft·lb.

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Where the ±3% Guideline Comes In

The ±3% figure is commonly used when discussing hydraulic torque wrench accuracy, but it should not be treated as a universal limit for every tool.

The wrench manufacturer may specify a different tolerance, and a customer, project, or quality program may have its own acceptance requirement. Those requirements should be established before the tool is tested so the results can be evaluated against the correct limit.

How a Hydraulic Torque Wrench Is Checked

During calibration, the wrench is connected to calibrated reference equipment so its actual torque output can be measured.

A typical test may include:

  • Checking that the reference equipment is current on calibration before testing begins.
  • Installing the wrench, reaction arm, socket, and other components correctly for the test setup.
  • Taking readings at several points through the wrench’s working range.
  • Recording the actual torque produced at each test point.
  • Comparing those readings with the tolerance or acceptance requirement being used for that tool.
  • Investigating the wrench further if one or more readings fall outside the required range.

If adjustment or repair is needed, the wrench can be tested again afterward to document its performance after the work is complete.

For more information on calibration and service, see:

If the Wrench Falls Outside Tolerance

One failed reading does not tell you what caused the problem.

Start by checking the test setup and making sure the reference equipment is current on calibration. Then look over the wrench, reaction arm, socket, hoses, fittings, and pump for anything that could affect the test.

Some things worth checking include:

  • A reaction arm that moved or was not seated correctly.
  • A worn or damaged socket.
  • Hydraulic leaks at hoses or fittings.
  • Pressure that is not staying consistent during the test.
  • Visible damage or wear on the wrench itself.

If nothing obvious explains the reading, the tool should be inspected by a qualified service technician. Any repair or adjustment should be followed by another calibration before the wrench returns to critical work.

Keep the Calibration Records With the Tool

The certificate should stay with the wrench’s service history.

That record gives you the test date, measured results, and other information needed to track how the tool has performed over time. If the wrench is removed from service for repair, keep the failed test results and the follow-up certificate together.

That history can be useful during audits, project handovers, or when deciding whether a tool’s calibration interval needs to be changed.

FAQ

Is ±3% required for every hydraulic torque wrench?
No. ±3% is commonly used as an accuracy guideline, but it is not a universal requirement. Use the manufacturer’s stated tolerance along with any customer, project, or quality-system requirements that apply to the job.

What happens if the wrench tests outside tolerance?
Document the reading and inspect the tool and test setup for a cause. If the wrench needs repair or adjustment, it should be tested again afterward before returning to critical service.

If you need help confirming the tolerance for a specific hydraulic torque wrench or arranging calibration and repair, contact Winshaw for testing and service options.