Pinning Resin Figures: Stronger Joints, Careful Drilling

Pinning adds a rod across a joint to help connect two parts. It can be useful where the design and available material support it. A hole drilled in the wrong place can also damage a part that did not need reinforcement.

This guide is for hobbyists assembling a delivered resin figure kit. Three details govern the decision: the joint's shape, the material around the proposed hole, and the load the connection will carry. A model's scale alone cannot supply a safe pin diameter or drilling depth.

Remerlinds makes unpainted resin figure kits for your own assembly and finishing. The project-selection section below explains what to check on a kit before treating pinning as part of the plan.

Decide whether the joint needs a pin

Inspect the original connection first. A broad, well-fitting keyed joint and a thin projecting connection present different problems; neither should be drilled automatically because a guide recommends pinning everything.

Dry-fit the parts and look at how they meet. Check whether the mating surfaces contact properly and whether the intended pose places a projecting part away from the main body. A pin cannot correct a badly aligned join by itself, nor should it be used to force two parts into position.

Consider how the completed figure will be handled. A display piece that is moved occasionally has a different use from something repeatedly packed for travel. That distinction can inform the assembly plan, but it does not give a numerical load rating to a hobby joint.

If a connection already fits as designed and the kit guidance does not call for reinforcement, compatible adhesive and proper support may be the appropriate approach. If the geometry is unclear, ask the workshop. The decision to leave a sound part undrilled is a valid result of the inspection.

Check the available material before choosing a rod

Choose the hole around the actual part, not around the rod already on your desk. You need enough sound material around and beyond the proposed path to avoid breaking through a surface or weakening an edge.

Look at the connection from several directions. A thick-looking shoulder can narrow sharply behind the contact face. A scenic base may have an internal cavity that is not obvious from above. If you cannot establish the available material, do not assume the part is solid.

There is no universal 3 to 5 mm drilling depth for every resin kit, and no safe diameter determined solely by a 75 mm label. The appropriate dimensions depend on the specific joint and its surroundings. A fixed recipe can be especially misleading at ankles, wrists, narrow weapons and thin base sections.

For a separate display plinth, identify its material too. Resin, wood, acrylic and metal need different tool and adhesive considerations. A plan that works for a resin-to-resin joint should not silently become the instructions for drilling every base material.

• Inspect the complete drilling path, not just the entry point.
• Keep uncertain hollow areas out of the plan.
• Choose dimensions from the joint's geometry.

Prepare the tools and support

Use a controlled drilling setup suited to small parts. A hand pin vise can offer deliberate movement, but the tool still needs an appropriate bit, stable support and a clear path away from your hands.

Inspect the bit and ensure it is held correctly in the tool. Arrange the part so that it will not rotate unexpectedly and so that pressure is carried by a substantial area rather than a fragile projection. Do not support the expected exit point with a finger.

Follow the drill, material and kit guidance for protection and dust control. Work in an area appropriate for the operation and keep other people and unrelated items away from the debris. This is not a recommendation to drill resin wherever the figure happens to be standing.

If you are new to the tool, practise on suitable spare material with a simple shape before touching an irreplaceable accessory. That practice is for control and alignment; it does not prove an unseen cavity in the real part is safe to drill into.

Mark the alignment while the parts still fit

Use the dry fit to establish where the two holes must meet. The aim is one aligned connection, not two individually neat holes that point in different directions.

Choose a position on the mating face that respects the surrounding material. Mark it lightly and compare the proposed direction with the full shape of the part. Keep the original fit visible in photographs or notes if the pose makes it easy to lose orientation.

When planning the second hole, use a controlled transfer method appropriate to the parts rather than estimating both centres independently. Whatever method you choose, avoid contaminating the bonding area or pressing hard enough to mark visible detail.

Reassemble the dry fit and check the mark from more than one angle before drilling. A small adjustment at this stage is easy. An angled hole already cut into a thin part can be much harder to correct without removing too much material.

Drill in small, deliberate stages

Advance only along a planned path and stop frequently to check progress. If resistance changes unexpectedly, the bit binds or the part moves, stop rather than pushing through.

Use the tool and bit according to their instructions. Keep the direction steady and clear debris using an appropriate controlled method. Do not use the bit as a lever to widen or realign the hole; that is a different action with a different risk to the surrounding resin.

Plan a depth limit from the material you have verified. A visible marker on a bit can be a useful reference, but it is not a physical stop and does not remove the need to inspect. Never drill until a guess at the depth seems about right.

Test the fit gently as you proceed. The rod should not require force that spreads the surrounding material. If it does not fit as planned, identify whether the issue is diameter, alignment, debris or length before removing anything else.

For a broader discussion of tool control and fragile parts, read drilling resin figures without cracking them. Keep the work tied to the actual connection rather than treating a general tutorial as the specification for your sculpt.

Cut and test the rod before adding adhesive

Prepare the rod so the parts can meet in their intended position without the pin bottoming out or holding the joint open. The dry fit should establish that before glue enters either hole.

Use a cutting tool suitable for the rod material and follow its protection instructions. Control the offcut so it does not become a loose sharp piece. Check the ends for anything that prevents a clean fit, without enlarging the resin holes simply to accommodate a rough cut.

Insert the rod gently and bring the parts together. Look for the same contact and alignment you established before drilling. If a gap appears only when the pin is inserted, stop and identify why. Do not close it by squeezing the parts harder.

Leave yourself a clear assembly order. A pin fitted at one connection can make a later movement impossible if the model has several interlocking parts. Rehearse the full relevant sequence with the intended supports before applying a product with limited working time.

• Check the rod length with the joint fully aligned.
• Do not force a tight or misdirected pin.
• Rehearse the assembly before opening the adhesive.

Use compatible adhesive and support the joint

Select an adhesive whose instructions suit both the resin and the pin material. Read the requirements for preparation, amount, working time and full cure before committing the joint.

Cyanoacrylate adhesives are commonly used with cured resin prints, while other adhesive systems may suit particular connections. That general compatibility does not make every formulation right for every gap or material pair. Choose the exact product on its specifications rather than a blanket claim that one family is always strongest.

Keep the mating areas in the condition the adhesive requires. Where direct material contact is needed, do not rely on a paint film as the structural connection. Plan those areas before painting so you are not scraping a finished costume at the last minute.

Apply and hold the joint as instructed, then leave it supported for the required interval. A connection that can be released from your fingers may not yet be ready to carry the completed figure. Do not test it by twisting the accessory or picking the model up by the new joint.

Finish the join without hiding a mechanical problem

Inspect the assembly after the adhesive has reached its instructed stage. Surface finishing comes after a sound fit; it should not be used to disguise a connection that still moves or sits incorrectly.

Check the pose and the visible join. If a small cosmetic gap needs attention, choose a compatible filler and keep it to the relevant area. Avoid covering nearby sculpted detail merely to make the whole region look uniformly smooth.

Plan local primer and paint work around the correction. A joint assembled before painting gives you different access from one assembled after separate painting. Either sequence can be useful, but each has to be decided with the particular sculpt in mind.

When moving the completed figure, support its base or substantial structure rather than relying on a pinned projection as a carrying handle. Reinforcement is not a reason to handle delicate work casually.

Choose the kit before planning extra reinforcement

When browsing the anime figure kits, inspect the pose and part arrangement. Pinning should answer a specific assembly need, not become a shopping requirement attached to every figure.

Some Remerlinds kits are listed at 75 mm, but sizes and connections vary. Read the exact listing and use the delivered parts to confirm the plan. A scale label cannot establish wall thickness, a safe drilling direction or the load capacity of a connection.

The preparation options explain the work included with Bronze, Silver and Gold. All remain unpainted kits. Do not assume a finish tier either requires pinning or certifies a particular pinning method; those are separate assembly decisions.

Recommended reading

• Preparing a resin kit covers inspection and dry-fitting before permanent assembly.
• Choosing a display base helps you plan the support beneath the whole figure.
• Priming without losing detail covers the coating stage after a join is finished.

Make the decision on one actual joint

Dry-fit the parts and identify the contact, the load and the available material. Decide whether the original connection and suitable adhesive are enough, or whether a carefully planned pin addresses a real need.

If you cannot explain where the hole will go and why there is enough material around it, stop before drilling and ask for guidance. A clear plan is the useful upgrade. Extra holes are not.