SPIROL

You can rely on SPIROL to be a design partner to help solve unique problems. Because we supply numerous customers with similar products in similar industries, we are able to meet most needs with our standard products at no additional cost. When the solution falls outside the normal requirements, we have the expertise and engineering personnel to solve those problems. By working with you at the design stage, we will develop a solution that lowers your overall product cost, improves product quality, increases the robustness of your manufacturing process, and gets you to market faster.

SPIROL’s Dowel Bushings and Spring Dowels are designed to maintain alignment and are used to locate components with respect to each other. These roll-formed, hollow Alignment Dowels have lead-in chamfers that facilitate insertion into the holes of both mating components. The Dowel's flexibility enables absorption of wide hole tolerances and the staggered seam prevents interlocking. Dowel Bushings are designed with an inside diameter clearance that allows the passage of a bolt for fastening, thereby eliminating the need to drill an additional hole. They are also heat treated to isolate the bolt from shear loads.

SPIROL’s GD100 Ground Hollow Dowels are designed to be direct replacements for Ground Solid Dowels manufactured per ISO 8734 when used in alignment applications. This innovative product is manufactured from strip steel, and then OD ground to achieve extremely tight diameter tolerances that enable critical alignment up to 20µm. The main advantage of the GD100 Ground Hollow Dowel is its ability to achieve the same alignment as the Ground Solid Dowel with a significant reduction in cost due to its hollow construction. In most scenarios, the Ground Hollow Dowel is approximately 50% lighter and at least 30% less expensive than the solid equivalent. If installation equipment is required, SPIROL also offers a standard comprehensive line of Installation Equipment from manual to fully automatic modules, with or without out fixturing, to support your assembly requirements.

SPIROL offers Spacers specifically designed for use in conveyor systems and garage door hinge assemblies. Both SPIROL's Conveyor Spacers and Garage Door Spacers are manufactured from galvanised steel to provide the necessary strength and corrosion protection at a fraction of the cost of plated cutoff tubing and machined bushings. SPIROL stocks the raw material and tooling required to manufacture the standard sizes of Conveyor Spacers and Garage Door Spacers. Intermediate lengths can be produced without additional tooling.

f your application requirements cannot be met by a standard SPIROL Spacer, our Application Engineering department will assist you in designing a tubular part that meets your specific needs. SPIROL specializes in replacing costly machined and cold-formed components with less expensive roll-formed product. SPIROL’s proprietary manufacturing technology enables the cost-effective production of special tubular products that meet the performance requirements of the comparatively more expensive alternatives.

SPIROL manufactures several different styles of Post Mould Installed Compression Limiters for installation into the plastic component after the molding process is complete. Installing Compression Limiters after the plastic has cooled typically results in the lowest total installed cost since there is no added cycle time associated with placing the Compression Limiters over core pins during the moulding process. Post mould installed Compression Limiters also eliminate any concern with damaging the mould due to improperly positioned components. SPIROL Standard Post Mould Compression Limiters include: The Series CL220 Split Seam, Series CL200 Split Seam - Slim Profile, Series CL350 Split Seam - Heavy Wall, Series CL400 Split Seam - Oval, Series CL6000, CL6100 & CL620 Aluminium and Series CL8000 & CL8100 Brass.

A fuel injection systems manufacturer used two steel brackets to clamp the fuel rail to the top of the engine. The customer was looking at changing these brackets to plastic to reduce costs. In order to prevent deformation of the plastic bracket during the tightening of the bolt, a Compression Limiter was required. The customer originally investigated the use of a machined Compression Limiter, but the savings from changing the metal bracket to plastic would have been lost considering the high price of the machined Limiter. The customer approached SPIROL to help provide a lower cost solution for the Compression Limiter. SPIROL recommended the use of a standard CL200 Compression Limiter based on the rated proof load of the bolt used in the assembly. This roll-formed Compression Limiter is a fraction of the cost of a machined Compression Limiter. In addition, the flexibility of the roll formed Limiter enabled the customer to widen their hole tolerances further reducing assembly costs.

SPIROL manufactures several different types of Moulded-In Compression Limiters that are designed to be installed into the plastic assembly during the moulding process. When moulding Compression Limiters into the plastic assembly, the moulding time is increased as the operator or a pick-and-place robot must load each Compression Limiter over the core pin(s) prior to closing the mould cavity. Precise placement of the Moulded-In Compression Limiter over the core pin is required; otherwise mould damage can occur. SPIROL Standard Moulded-In Compression Limiters include: The Series CL500 Moulded-In, Series CL460 Moulded-In - Oval, Series CL600 & CL601 Aluminum and Series CL800 & CL801 Brass.

Press-In Inserts are designed to be pressed into a straight hole without melting the plastic prior to installation. Ideal for use in softer plastics, the helical knurls of the Press-In Inserts are used to provide both torque and pull-out resistance and to ensure good plastic flow as the Insert rotates into the hole. Installation torque to achieve sufficient tension between the threads is not a problem in that the helical knurls are designed so that the direction of the installation torque will have the tendency to drive the Insert into the hole — which of course is not possible — as the threaded joint is tightened. A pilot only slightly smaller than the hole and of sufficient length is designed to assure straight insertion into the hole. Press-In Inserts offer rapid installation with no specialized equipment and achieve good overall joint performance. If installation equipment is required, SPIROL also offers a standard comprehensive line of Insert Installation Equipment.

The course external thread of SPIROL's Self-Tapping Insert forms an internal thread within a molded or pre-drilled hole during the installation process into a plastic assembly. SPIROL Series 10 Self-Tapping Inserts are thread forming Inserts best suited for softer thermoplastics or thermosets. Self-Tapping Inserts provide the best pull-out resistance for a post-mold installed Insert, yet generally cost more than their post-mold counterparts. The external threads are designed with a thin profile to minimize induced stress in the plastic and have a relative coarse pitch to provide the maximum plastic shear surface to resist pull-out.