Run Wheel Balancer Daily Calibration Inspection — Free

Inspection Details

Inspection Date and Time

Record the date and time this calibration check is being performed.

Technician Name

Full name of the technician performing this calibration check.

Wheel Balancer Make and Model

Enter the manufacturer and model number of the wheel balancer being inspected (e.g., Hunter Road Force Elite, Coats 9028A).

Equipment Asset / Serial Number

Enter the shop asset tag or manufacturer serial number for traceability.

Pre-Calibration Equipment Condition

Balancer is powered on and self-diagnostic startup completes without error codes critical (required)

Observe the startup sequence. Confirm no fault codes or warning indicators are displayed on the console.

Yes No N/A

Balancer shaft, flanges, and mounting cones are free of visible damage, cracks, or deformation critical (required)

Inspect the main shaft and all calibration cones for chips, cracks, or bending. Damaged cones produce inaccurate calibration results.

Yes No N/A

Photo evidence (optional)

Balancer is positioned on a level, stable floor surface — no rocking or movement when shaft is loaded

Apply light downward pressure to the shaft. The machine must not rock. An unlevel balancer introduces systematic error in all readings.

Yes No N/A

Guard/hood is present, undamaged, and closes fully without obstruction critical (required)

Confirm the safety hood or guard is intact and latches correctly. Per OSHA 29 CFR 1910.212, machine guarding must be in place before operation.

Yes No N/A

Power cord and foot pedal/control cable are free of cuts, fraying, or exposed conductors critical (required)

Visually inspect the full length of the power cord and any control cables. Damaged cords must be taken out of service per OSHA 29 CFR 1910.303.

Yes No N/A

Zero-Calibration (Zero-Cal) Check

Calibration weight set is present, complete, and undamaged critical (required)

Confirm all calibration weights specified in the manufacturer's service manual are on hand and show no deformation or corrosion that would alter their mass.

Yes No N/A

Zero-cal routine initiated per manufacturer procedure (no wheel or weight mounted on shaft) critical (required)

With the shaft bare, initiate the zero-cal sequence from the balancer console. Follow the OEM steps exactly — do not skip prompts.

Yes No N/A

Zero-cal spin completes without vibration, noise, or error message critical (required)

Observe the spin cycle. Abnormal vibration or noise indicates a bearing or shaft issue. An error message must be investigated before proceeding.

Yes No N/A

Zero-cal result displayed — static imbalance reading (oz or grams) critical (required)

Record the static imbalance value shown after the zero-cal spin. Acceptable range is typically ≤ 0.1 oz (≤ 3 g); confirm against your machine's specification.

Zero-cal result is within the manufacturer's acceptable tolerance (≤ 0.1 oz / ≤ 3 g or per OEM spec) critical (required)

Confirm the recorded zero-cal reading falls within the acceptable tolerance stated in the manufacturer's calibration manual. If out of tolerance, the machine must be re-zeroed or removed from service.

Yes No N/A

Zero-cal accepted / confirmed on console — machine ready indicator displayed critical (required)

Confirm the balancer console shows a 'calibration accepted' or equivalent ready state after the zero-cal routine completes successfully.

Yes No N/A

Cone-Spin (Reference Wheel) Verification

Calibration/reference wheel assembly is dedicated, undamaged, and stored clean critical (required)

The reference wheel must not be used for customer service. Inspect for bent rim, missing test weight, or contamination that would alter the known imbalance value.

Yes No N/A

Reference wheel mounted securely on shaft with correct cone and wing nut — no wobble detected critical (required)

Mount the reference wheel using the appropriate centering cone per the manufacturer's mounting procedure. Spin the wheel by hand to confirm no wobble before initiating the powered spin.

Yes No N/A

Cone-spin test initiated and completes without error, vibration, or noise critical (required)

Run the full spin cycle with the reference wheel. Abnormal noise or vibration must be investigated before the machine is returned to service.

Yes No N/A

Balancer-reported imbalance value for reference wheel (oz or grams) critical (required)

Record the imbalance value displayed by the balancer for the reference wheel. Compare to the known reference value marked on the wheel or in the calibration log.

Reported imbalance is within ± 0.25 oz (± 7 g) of the reference wheel's known value critical (required)

Compare the displayed reading to the known imbalance value of the reference wheel. A deviation greater than ± 0.25 oz indicates sensor drift or mechanical issue — remove from service and contact service technician.

Yes No N/A

Cone-spin angle/position reading is repeatable — second spin result matches first spin within ± 5°

Perform a second spin without repositioning the wheel. The angle of heaviest point must be consistent between spins, confirming sensor repeatability.

Yes No N/A

Calibration Outcome and Corrective Actions

Overall calibration result critical (required)

Select the outcome of today's calibration check.

If FAIL: Out-of-service tag physically attached to the balancer and machine is de-energized critical (required)

If the machine failed calibration and cannot be corrected on-site, confirm an out-of-service tag is attached and the machine is locked out per OSHA 29 CFR 1910.147 (LOTO) until serviced.

Yes No N/A

Deficiencies or observations noted during this inspection

Describe any deficiencies, near-misses, or observations that require follow-up. Enter 'None' if no issues were found.

Corrective action taken or work order number (if applicable)

If any corrective action was taken or a service work order was opened, record the details or WO number here.

Inspector Signature

Technician signature confirming all checks were performed accurately and results are truthfully recorded.

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Run: Wheel Balancer Daily Calibration Inspection

Inspection Details

Pre-Calibration Equipment Condition

Zero-Calibration (Zero-Cal) Check

Cone-Spin (Reference Wheel) Verification

Calibration Outcome and Corrective Actions

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