To replace the nails of RPSexDoll, one needs a special kit (silicone nail kit, medical grade adhesive, cleaning pad). One operation will take approximately 20 minutes and cost around 50-150 yuan (depending on nail material). For example, when removing the old nails, one must loosen the knuckle screws with a 1.5mm hex wrench (torque is limited to 0.3-0.5N·m) to avoid damaging the internal skeleton (maintenance can cost as much as 800 yuan). Clean the contact surface with 70% isopropyl alcohol to remove the residual glue stains (residual rate should be < 5%), or else the new nail bonding strength will decrease by 30%. Press the pre-shaped silicone nail (size fit rate 98%) for 30 seconds after alignment when installing, and the curing time of the adhesive is about 2 hours (24 hours for full curing), during which pressure is avoided (load < 1kg).
In terms of technical parameters, the nail groove specification of rpsexdoll is usually 15mm in length and 8mm in width (error ±0.2mm). If a third party nail (e.g., acrylic material) is used, its thickness must be ensured to be less than 2mm; otherwise, the buckle will be broken (probability increases by 25%). A user feedback, using unofficial nail glue (e.g., 502 glue) resulted in corrosion of the silicone surface, the maintenance cost was added by 300 yuan. The recommended official proposal is Liquid Silicone Adhesive (3500cps) with 4.5MPa bond strength (industry standard 3MPa) and strong temperature resistance (below 80 ° C).
In terms of safety and maintenance, it is recommended to check the nail status every 3-6 months (wear rate has a positive correlation with the frequency of use, and the average life expectancy of 10 times bending per day is approximately 1 year). If the nail edge is cracked (cracks > 0.5mm need to be replaced immediately), temporary repair can be accomplished with food grade silicone filler (20 yuan/piece). According to the 2023 after-sales statistics, knuckle failures caused by self-replacement totaled 37%, and the official maintenance service charge averaged 200 yuan/time. To reduce the risk, some high-end products (e.g., rpsexdoll Pro) use magnetic nail design (magnetic strength 0.6T), which takes only 5 minutes to replace, at the cost of raising the kit price to 300 yuan/set.
Legally and in terms of compliance, self-modification that results in product damage can be contrary to warranty (official warranty period is cut by 72%). EU CE certification requires adhesives to be subjected to RoHS testing (heavy metal residue < 0.01%), and part of the lower glue lead content exceeds the standard (12% of the test cases exceed the standard 3 times), which is hazardous to health. It is recommended to purchase replacement components through official channels (98% original) or opt for medical-grade material certified by ISO 10993 to ensure biocompatibility (allergy rate reduced from 8% of non-standard products to 0.3%).