Troubleshooting
SYMPTOM – Increased Efficiency Loss
(Low Torque Audit)
Corrective Action: Increase lubrication frequency and review preventative maintenance documentation.
Corrective Action: Clean and degrease all components, replace bearings, lubricate, and review the preventative maintenance documentation.
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.
SYMPTOM – Increase in Torque Scatter
(Increase in Torque Standard Deviation or Decrease in a Machine Capability Index)
Corrective Action: Increase lubrication frequency and review preventative maintenance documentation.
Corrective Action: Clean and degrease all components, replace bearings, lubricate, and review the preventative maintenance documentation.
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.
SYMPTOM – Gearbox Fracture
Corrective Action: Unless quoted and designed to do so, using a gearbox as a reaction device is not acceptable.
Corrective Action: Stop using the attachment on the problem fasteners and contact JEMMS to evaluate the space constraint and new design options.
Corrective Action: Reduce or eliminate the number of extension joints or overall extension length through assembly process reorganization.
Corrective Action: The gearbox will not withstand forces generated during operation with debris created from internal component failure.
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.
SYMPTOM – Socket Gear Fracture
Corrective Action: Evaluate the possible use of socket extensions, multiple socket adapters, additional attachments, assembly steps reorganization, or attachment redesign.
Corrective Action: Socket gears are considered wear items and are excluded from JEMMS limited warranty.
SYMPTOM – Output Will Not Turn
Corrective Action: Remove attachment from power tool. If it doesn’t turn freely by hand a service inspection is required to determine extent of the damage.
SYMPTOM – Tubenut Attachment Will Not Home
Corrective Action: The tubenut homes by operating the tool in reverse with a 5Nm target.
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.
SYMPTOM – Hold Bit Fracture
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.
SYMPTOM – Loose Hold Bit
Corrective Action: Consider a bit modification, groove or drill point, if frequent or unacceptable amount of set screw loosening is occurring. Retighten set screw.
SYMPTOM – Gearbox Screws are Loose or Missing
Corrective Action: Apply Loctite 242 to all gearbox fasteners, replace missing fasteners, and retighten.
SYMPTOM – Collar bolts or threads are loose
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.
Corrective Action: Routine usage in the opposite direction from design intent requires a special collar. Contact JEMMS with requirements for recommendations.
SYMPTOM – Socket is Stuck on the Fastener
Corrective Action: Contact JEMMS about designing and manufacturing custom socket geometry.
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 cycle complete. (Example: Apply brakes at cycle start, release at cycle complete)