• 10 parts
  • Checked September 2026

Parts of a Baitcaster

A baitcasting reel from above, then from the handle side.

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1 2 3 4 5 6 7 8 9 10
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Each numbered ring is a button. Use the arrow keys to move between them and Enter to choose. Names are read out in Study, and once a part is answered.

All 10 parts on the diagram

Show the list

From above 7

  1. Spool On a baitcaster the spool turns as the line runs out. One turn of the handle turns it several times.
  2. Line guide It moves from side to side as you wind. The line then lies evenly on the spool. The mechanism is the level wind.
  3. Worm shaft It runs across the front of the reel. It carries the line guide.
  4. Thumb bar Pressing it puts the reel into free spool for a cast. The thumb then rests on the spool to control it.
  5. Side plates The handle is on one of them. A parts list names them the left side plate and the right side plate.
  6. Frame The frame is the body of the reel. Frames are made of metal or of lighter composites.
  7. Handle One turn of the handle turns the spool several times. A baitcaster is a multiplying reel.

Handle side 3

  1. Star drag Turning it sets how hard a fish must pull to take line. The line comes off the spool.
  2. Spool tension knob The spool tension knob adjusts how freely the spool turns.
  3. Reel foot The reel foot fits into the reel seat of the rod. A baitcaster sits on top of the rod handle.

How this list was compiled: Every name checked on 2026-09-30, a name kept only where two of these use it: (1) a reel maker's exploded parts list for a baitcasting reel, in a collection of reel schematics at https://archive.org/details/south-bend-reel-schematics (left and right side plate, spool assembly, worm shaft, line guide, frame, thumb bar, spool tension knob, star drag assembly, handle assembly); (2) Wikipedia, Fishing reel, the baitcasting reel section, text only, https://en.wikipedia.org/wiki/Fishing_reel (spool, line guide, level-wind mechanism, crank handle, frame, star-shaped drag control knob, free spool, reel foot and reel seat); (3) fishing reference books and two retailers' catalogs, passages read through the Internet Archive full-text search: Ken Schultz's Fishing Encyclopedia, https://archive.org/details/kenschultzsfishi00schu_0; The Care and Repair of Fishing Tackle, https://archive.org/details/carerepairoffish0000mars; Fisherman's Bible, https://archive.org/details/fishermansbiblew0000unse; catalogs at https://archive.org/details/cabelasworldsfor0002cabe and https://archive.org/details/huntingfishingou0000unse (star drag, thumb bar, spool tension knob, level wind, worm shaft, side plates, reel foot). Licence: own work

The drawing: Drawn for this site on 2026-09-30 from plain geometry; no maker's reel, nothing traced. Licence: own work

How it works

A baitcaster is a reel with a spool that turns as the line runs out, and it sits on top of the rod. The first view shows it from above; the second from the handle side.

Read the full guide

From above, then the handle side

Numbers 1 to 7 are on the reel seen from above, its front at the top. The spool sits between the two side plates, and the frame joins them. In front of the spool the line guide rides on the worm shaft; behind it is the thumb bar. The handle is on the right. Numbers 8 to 10 are on the handle side: the star drag behind the handle, the spool tension knob on the plate and the reel foot underneath.

  • Line guide or worm shaft? The guide is the small block the line passes through. The worm shaft is the grooved bar it slides along.
  • The star drag and the spool tension knob are both on the handle side. The star is the large one, right behind the handle.

Questions and answers

What are the parts of a baitcaster reel?

A frame, two side plates and the spool between them. The line guide rides on the worm shaft in front; the thumb bar is behind. On the handle side are the handle, star drag and spool tension knob. The reel foot is underneath.

What does the star drag do on a baitcaster?

It is the star-shaped knob behind the handle that sets the drag. The drag slows a fish that is pulling line off the spool.

What is the level wind on a baitcaster?

The mechanism that moves the line guide from side to side as you wind. It lays the line evenly across the spool, so the line is not trapped under itself on the next cast.

What is backlash on a baitcaster?

Backlash, or overrun, happens when the spool turns faster than the line is leaving the reel. The thumb on the spool controls it, and modern reels add centrifugal or magnetic brakes to help.

How is a baitcaster different from a spinning reel?

A baitcaster's spool turns during the cast and the reel sits on top of the rod. A spinning reel has a fixed spool, so the line leaves it freely and the reel is easier to use.