String making notes

Here are some notes on how to make your own string

 

Material

BCY 452X - Compound Strings

BCY 8125g - Recurve, fibreglass backed/laminated longbows

B50 - has more stretch and is suited to beginner bows, low poundage bows and all full timber longbows.

 

Diamond back, std serving used on club bows

Halo Serving - more slippery and comes in a range of sizes to suit.

 

Sizes - Strands

Made in combination with the serving to suit arrow nocks and feel of shot by archer. What suits you.

More strands gives slower more forgiving string -->  strengthens/stiffens arrow

Less strands gives faster less forgiving string -->  weakens arrow

Wind on evenly with no overlaps and even tension, ensure tension has been evened out before serving.

Commonly 18-20 strands occasionally see 16 strands for fast string 8125g

Club Bows B50 14 Strand with diamond back serving - check against nocks.

Two colour strings - cover twisted or mixed colours under end loops.

Nock Size

Strands

Serving

1

Thin

16 8125g

0.019 Halo

18 8125g

0.014 Halo

20 8125g

0.007 Halo

2

Thick/Large

16 8125g

18 8125g

0.019 Halo

20 8125g

0.014 Halo

Club Bows

14 strand B50 with 18th Diamond back serving to suit standard nocks used. (Test when serving ends after loop formed)

 

Length

Set Jig to required length, which is typically 3 inches shorter than the bow length, measure point to point on old string (same place).

Some jigs require more allowance than others, pin sizes, string material, jig flex and tension on strings all affect the length.

If measuring from an old string make sure you untwist string before measuring it.

Also consider - Is the old string at correct Brace height for the bow, does it need to be modified?

 

Loops

Top loop is bigger than the bottom loop. Big enough to slide along the limb when taken off string groove in limb tip.

 

Twists

The string should be twisted in the same direction as the serving material is going to be applied or is applied.

Which way for a left or right handed archer? Does it really matter?

The string will tighten at one end and loosen at other end due to fingers of archer.

Does it matter what is at top or bottom? (top tighter or looser?) Consider the serving and/or the nock position.

RH twists mean a RH archer will tighten string at top? Loosen at bottom. Nock therefore rises slightly.

For RH Archer use RH thread on serving. Tightens at top on finger slip around string when releasing

For LH Archer use LH thread on serving. Tightens at top on finger slip around string when releasing

This is potentially a better outcome than having the nock drop.

String Twist

Options

1.

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\___    The string is twisted when turned anti-clockwise from end loop looking towards string (string going away behind loop).   Note this forms a right hand thread. (RH Archer)

 

2.

___

///////////////////////////////////           The string is twisted when turned clockwise from end via loop looking towards string (string going away behind loop).  Note this forms a left handed thread. (LH Archer)

 

 

Serving

Serving should be applied consistently, serve around string in same direction for both ends and centre serving to match twists to be applied to string.

The center serving  should be applied after a few twists have been applied to string (10-20 for normal competitive recurve) start with 10 twists for club bows.

End servings

What matters is that the serving is applied when/after ends are looped goes in the same direction as twists will be applied.

RH Archer

-->

\\\\\\\\\\\\\\\                                                                    \\\\\\\\\\\\\\\\

//                                ===String===\\N\\N\\\\\\\========                     //

\\\\\\\\\\\\\\\\\\\\                       Serving                              \\\\\\\\\\\\

Top                      <--                                                             Bottom

 

The serving pattern above should be used with Twist option 1. (Which way is the twist wanted or the serving jig used)

Slight overlap to minimise bulge on serving going over to unserved string. (Wear point). If the overlap causes a bulge point this may cause the string to not follow the center of limbs during a shot, avoid this by serving with no overlap.

 

LH Archer

<--

/////////////////////                                                                 /////////////

\\                             ===String===//N//N///////=========                       \\

///////////////                                Serving                         ////////////////

Top                                                                           -->         Bottom

 

The serving pattern above should be used with Twist option 2. (Which way is the twist wanted or the serving jig used)

Slight overlap to minimise bulge on serving going over to unserved string. (Wear point).

If the overlap causes a bulge point this may cause the string to not follow the center of limbs during a shot, avoid this by serving with no overlap.

 

Centre serving

Applied after initial twists (10-20) are put in string, waxing and clean up of wax on string. Use spare off cut to burnish and round string before applying serving.

Commonly this is done with the string on the bow. Check that the top and bottom are at right positions for protecting the string from fingers and rubbing on arm/guard.

 

NOTES:

  • Don't forget - make 2 strings at the same time with same build method so you have a spare that is as close to the other string as possible.
  • Practice on club strings!
  • Don’t make a string with servings done in different directions on end.

 

Any questions - ask a coach!