Frequently Asked Questions (FAQs)

Could it be a Lack of Lubrication?

Corrective Action: Increase lubrication frequency and review preventative maintenance documentation.

Are you experiencing Bearing Failure?

Corrective Action: Clean and degrease all components, replace bearings, lubricate, and review the preventative maintenance documentation.

Have you Exceeded the product’s service life?

Corrective Action: Review limited warranty documentation, time since purchase, and fastening cycles. Order replacement assembly and contact local distributor or JEMMS about usage, expected life cycles, and typical lead times to eliminate future downtime.

Could it be a Lack of Lubrication?

Corrective Action: Increase lubrication frequency and review preventative maintenance documentation.

Are you experiencing Bearing Failure?

Corrective Action: Clean and degrease all components, replace bearings, lubricate, and review the preventative maintenance documentation.

Have you Exceeded the product’s service life?

Corrective Action: Review limited warranty documentation. Order replacement assembly and contact local distributor or JEMMS about usage, expected life cycles, and typical lead times to eliminate future downtime.

Are you using the Gearbox as a reaction device?

Corrective Action: Unless quoted and designed to do so, using a gearbox as a reaction device is not acceptable.

Is the assembly environment prohibiting the alignment between the gearbox’s output and the fastener?

Corrective Action: Stop using the attachment on the problem fasteners and contact JEMMS to evaluate the space constraint and new design options.

Are you using output extensions, adapters, or extended socket gears?

Corrective Action: Reduce or eliminate the number of extension joints or overall extension length through assembly process reorganization.

Is there an Internal component failure?

Corrective Action: The gearbox will not withstand forces generated during operation with debris created from internal component failure.

Have you Exceeded the product’s service life?

Corrective Action: A fatigue failure is the ultimate outcome of all limited clearance fastening applications. Review limited warranty documentation, time since purchase, and fastening cycles. Order replacement assembly and contact local distributor or JEMMS about usage, expected life cycles, and typical lead times to eliminate future downtime.

Is there Misalignment or less than full socket engagement with the fastener?

Corrective Action: Evaluate the possible use of socket extensions, multiple socket adapters, additional attachments, assembly steps reorganization, or attachment redesign.

Have you Exceeded the product’s service life?

Corrective Action: Socket gears are considered wear items and are excluded from JEMMS limited warranty.

Is there any Internal damage?

Corrective Action: Remove attachment from power tool. If it doesn’t turn freely by hand a service inspection is required to determine the extent of the damage.

Is there a Programming error?

Corrective Action: The tubenut homes by operating the tool in reverse with a 5Nm target.

Is the Stop Pin damaged?

Corrective Action: Remove and replace stop assembly and inspect stop or drive gear sweep for damage. Verify that the reverse parameter is stopping the power tool at 5Nm.

Does the product feature geometry cause frequent bit changes?

Corrective Action: The hold feature, torque, and in turn bit durability is controlled by the product being assembled. JEMMS can only design attachment internals to be more durable than the hold of the product to ensure that the bit is the consumable item. Although JEMMS engineering may be able to create incremental changes in durability, substantial changes can only occur with the product company.

Does the Joint vibration loosen the set screw retaining the hold bit?

Corrective Action: Consider a bit modification, groove or drill point, if frequent or unacceptable amount of set screw loosening is occurring. Retighten the set screw.

Does the Power tool create higher than normal vibrations?

Corrective Action: Apply Loctite 242 to all gearbox fasteners, replace missing fasteners, and retighten.

Does Joint vibration loosen the collar threads or bolts?

Corrective Action: Retighten and closely monitor collar threads or bolts over the next 1,000 cycles. Loose collar components can damage an attachment through internal sideloading and cause head separation with unexpected movements or rotation.

Are fastening cycles being run in the direction opposite of intended (loosening with a hand tool)?

Corrective Action: Routine usage in the opposite direction from design intent requires a special collar. Contact JEMMS with requirements for recommendations.

Is the fastener geometry non-standard, made of a soft material, or treated in a way that increases drive geometry?

Corrective Action: Contact JEMMS about designing and manufacturing custom socket geometry.

Is the Fixture binding?

Corrective Action: Minimize deflection between attachment outputs as well as between outputs and the product being fastened. Utilize a programmed socket relaxation strategy. Create fixture compliance after the cycle completes. (Example: Apply brakes at cycle start, release at cycle complete)

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• Email torqu-e@jemmsinc.com
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• Email torqu-e@jemmsinc.com

Visit our Documentation page for Service manuals, Warranty Information and Preventative Maintenance.

Ongoing opportunities to address customer challenges and our direct approach to fastening challenges with creative robust solutions. We offer responsive feedback, visual examples, and customer visits to better appreciate the operational challenges and how to improve them.