• The HD4170 Rhino Roll is a production quality electric spiral coil inserter that is made as part of the Rhin-O-Tuff line of binding equipment.
• This machine is designed as companion for your heavy duty Rhino modular binding punch. In fact, it can even be bolted to the top of most HD and OD series punches for convenience and to save space.
• The HD-4170 has dual powered adjustable rollers to help spin your coils onto your documents.

Strengths / Features:

• The rollers used on the HD 4170 are excellent. It uses one high quality rubber roller to grip the coil and another smooth black roller to help make sure that the coil doesn't get off track. Both of these rollers spin to help keep the spiral moving across the edge of your book. This is similar to the design used on the GBC CC2700 which is a much more expensive machine.
• The smaller bottom roller on the HD4170 is fully adjustable. If you are using this machine with smaller diameter books you can set the rollers so that they are closer together. Likewise, when using large diameter coils, it is possible to increase the distance between the rollers. This feature allows Rhin-O-Tuff to claim that the HD4170 is compatible with all of the sizes and pitches of spiral coil that are available on the market.
• The Rhino Tuff 4170 includes a pair of spiral coil crimpers in the box with the machine. This isn't a huge deal since the crimpers are only worth about $30. However, the machine has a holder on the side of it to keep your crimpers within reach. This helps to keep your crimping pliers from getting lost and ensures that they are readily available when you need them. This is very important since it is nearly impossible to bind documents with spiral coils if you don't have a pair of crimping pliers.
• The Rhino Roll HD4170 can either be used as a standalone spiral coil inserter or it can be bolted to the top of your HD or OD series Rhino-Tuff binding punch. Attaching this machine to your Rhinotuff punch can help you to conserve space and maximize productivity. However, the fact that you don't have to attach this machine is nice for organizations that prefer to bind documents in an assembly line fashion.

Weaknesses / Limitations:

• Although Rhin-O-Tuff claims that this machine can be used with all pitches and diameters of coil, this is only sort of true. Although it is theoretically possible to use this machine with extremely large sizes of coil (35mm - 50mm) it is not really practical. It is extremely difficult to use this type of coil inserter with these large sizes of coil. The coil gets caught on the edge of the pages and becomes deformed causing a big mess. This can be improved by using an oval hole punch and by properly forming the spines of your book. However, it is still difficult.
• Attaching this machine to your Rhin-O-Tuff punch is no small task. You need a special kit in order to bolt the two machines together. This kit is sold separately from the machine. However, even with the kit you can expect to spend between 30-45 minutes figuring out how to attach the two machines (that is how long it took me). Considering this fact, it probably isn't advisable to bolt your machines together if you ever plan on using the two machines separately. It is also important to note that this machine will not bolt to horizontal punches or to the HD7500.

Recommendation:

• If you have a Rhin-O-Tuff binding punch and are looking for a high quality coil inserter to use with your machine the Rhino Roll HD4170 is the logical choice.
• This high quality machine is both versatile and durable. It is designed for production environments where productivity is essential.
• The dual roller design and the fact that you can fully adjust the rollers make it compatible with a huge variety of coil sizes and pitches. However, it is still difficult to use extremely large coils with this system.
• Even so, this is one of the highest quality coil inserters that I have seen and it is an excellent choice for high volume users who need a standalone machine or who want to bolt an inserter to the top of their modular binding punch.