Firenock:AeroBowString Serving Jig

    Firenock, as a premium nock company, has always felt like a tire company.  To fit every customer's needs, we must create "tires", or products, to fit their "rims" of unknown shapes and sizes.  Over the years, many of our customers have told us that our nock to string fit is not ideal.  This led us to delve deeper and do some research.  As a result of our research, we decided that there is nothing wrong with our nocks, but with, instead, the string itself.  Issues like inconsistency after spool change or server changes were brought to our attention.   How could we solve these inconsistencies?  We concluded that the true problem lied in the fact that, today, there is a lack of a string standard; so we built one.  We at Firenock present the AeroBow String Serving Jig, designed to handle the high volume, high demand, and high tension process of string building (involving the need to constantly hold pressure up to 5 KgF for an extended period of time) and create a new string standard.

Key Features of ABSSJ
  • Compatible with most current serving thread spools and market available spools (e.g. Specialty Archery)
  • 7075 Aluminum main body secured by two GR5 Titanium shoulder screws for rigidity and perfect alignment
  • Body with rounded corners to prevent thread damage, especially while nicking the thread at high pressure
  • Detachable spool shaft with drag system for easy spool replacement and retaining drag pressure setting
  • Both spool lock and drag lock knobs are dual O-ring fitted to allow stable operation and fine adjustment
  • Spool is supported by two ball bearings (i.e. shaft-less support) for smooth and direct drag operation
  • Hollowed titanium rollers for strength and light weight
  • Flanged ball bearings-supported rollers for ultimate smoothness, minimum tolerance and ultimate control
  • Spool holders with handles for easy spool installation and drag adjustment with or without the jig body (v1.2 only)
  • String lock to prevent string jumping out even without tension (v1.2 only)

AeroBow String Serving Jig
ABSSJ Spare Spool Shaft with Drag System
ABSSJ Spare Spool

Introduction of ABSSJ v1.0

The New Features of ABSSJ v1.2


The 9 Element Drag System

    ABSSJ utilizes a true drag system for tension control.  Just like most ultra high performance fishing reels, it has a nine-element drag system which consists of five graphite-weaved drag washers and four titanium drag washers.  This drag design allows the serving tension to be set up to 400% higher than what most other string serving jigs.  The drag system is pre-lubed with Teflon/PTFE drag grease, and it is also ready to be oil filled as the drag knob is fitted with dual O-rings.  The drag system can be used with a computer-controlled, brush-less motor-serving machine (~1,600 RPM) without pressure fading or component failure for professional string building environment.

Key Components
    After receiving feedback from some commercial string builders, we learned that customers want a jig with size, but not heft and a jig that can last (since it would use for thread production.)  After taking these points into consideration, we worked to ensure that the key components of the ABSSJ unarguably fulfill these requirements.  In addition, we wanted to keep the design balanced as well.  To allow easy control during operation, the drag knob of our ABSSJ is larger than the spool-lock knob, yet hollow to keep the weight stabilized. 
  1. Main shaft made of titanium
  2. Main-body, drag cup, spool lock, and spool knobs made of 7075-T5 aluminum with type 2 level 3 anodization
  3. All 3 thread rollers hollow and made of titanium
  4. Spool catch made of stainless steel
  5. Main body shoulder screws made of GR5 Titanium


Optional Accessories
    Spare shaft for spool with drag system: Available separately as add on option for those who would like to quickly swap the entire spool/drag unit without changing the spool in order to retain preset pressure.

    Spare spool: Available separately as an add-on accessory for those who need multiple spools for different threads/setups.

20170523©