Parts of a Compound Bow Explained: Diagram & Guide

Compound Bow Parts Diagram

A compound bow is easiest to understand as four connected systems. The rigid structure holds everything in alignment. The power system stores and releases energy. The arrow-control components position the arrow through the launch. The aiming and balance accessories help the archer repeat the same shot.

Riser, Limbs, Limb Pockets, and Axles

Riser

The riser is the rigid center of the bow. It carries the grip and provides mounting locations for the arrow rest, sight, stabilizer, quiver, wrist sling, and sometimes integrated accessories. Modern risers are commonly machined aluminum or molded carbon. Their geometry must resist twisting while keeping the bow light enough to hold steadily.

The sight window is the open area above the grip where the arrow passes. The Berger hole or rest mounting area provides a reference for many rest systems. Accessory interfaces vary by model, so confirm whether a bow uses standard side mounts, dovetail systems, Picatinny-style sight mounts, or an integrated rest interface before buying accessories.

Limbs and limb pockets

The limbs flex during the draw and store most of the bow’s energy. Split limbs use separate upper and lower limb sections; solid limbs use one wider piece at each end. Limb pockets connect the limbs to the riser and control their alignment. Limb bolts may provide an approved draw-weight range, but the safe number of turns and adjustment sequence come from the exact owner’s manual.

Never draw a bow with a visibly cracked limb, loose pocket, or unknown hardware condition. Do not remove limb bolts or work on a loaded limb system without the manufacturer-approved equipment and procedure.

Axles and bearings

Axles support the cams or wheels at the limb tips. Bearings or bushings allow those components to rotate. Bent axles, damaged bearings, or sideways movement can affect timing, noise, and arrow flight. These are technician-level inspection points rather than field-adjustment items.

Cams, Modules, Bowstring, and Cables

Cams and wheels

The cam system gives a compound bow its distinctive draw-force curve. As the cams rotate, the archer first builds peak draw weight and then reaches let-off near full draw. Let-off reduces the holding weight, while the draw stops or module geometry establish the wall and final draw length.

Single-cam, hybrid, binary, and dual-cam systems route cables differently. Do not assume one system’s timing marks, module screws, or press procedure apply to another. The manufacturer’s manual is the controlling reference.

Modules and draw stops

Rotating or replaceable modules set draw length on many bows. Draw stops contact the limb or cable to end the draw cycle. Some adjustments can be completed externally with ordinary tools; others require a bow press or replacement parts. A correct draw-length setting should be confirmed through posture and anchor alignment, not selected only from height.

Bowstring and cables

The bowstring carries the D-loop, nocking point, peep sight, silencers, and speed components. Control and buss cables coordinate cam movement and load the limbs. Serving protects high-wear areas and creates consistent nock fit. Frayed strands, separated serving, flattening, fuzz concentrated at contact points, or sudden peep rotation require inspection.

Grip, Arrow Rest, Nocking Point, and D-Loop

Grip

The grip is the archer’s contact point with the riser. Its shape influences hand position and torque. A repeatable grip places pressure through the thumb-side pad of the hand while keeping the fingers relaxed. Gripping tightly or changing pressure during the shot can rotate the bow and move impact.

Arrow rest

The rest supports the shaft during the first part of the power stroke. Common styles include containment rests, drop-away rests, blade rests, and launcher systems. The correct position depends on center shot, nocking height, arrow diameter, vane clearance, and the bow design. Rest security and repeatable return are essential before paper tuning the compound bow.

Nocking point and D-loop

The nocking point establishes where the arrow clips onto the string. A D-loop gives a release aid a consistent connection around that point. Loop length changes anchor geometry and perceived fit, so it should not be used casually to compensate for an incorrect bow draw length. Check the loop material and knots for wear before every session.

Cable guard or roller guard

The cable-management system moves cables away from the arrow’s path. A rod-and-slide design uses a sliding block; a roller guard uses wheels to reduce friction. Position and load influence clearance and sometimes lateral tuning. Use model-specific instructions before changing this system.

Sight, Peep, Stabilizer, and Other Accessories

Bow sight

A sight provides one or more aiming references. Fixed-pin sights assign a distance to each pin, while movable sights use a single pin or scope housing with an adjustable scale. Second- and third-axis settings matter when the bow is canted or aimed uphill and downhill. Mounting screws, housing alignment, and the level should be checked regularly.

Peep sight

The peep is a small aperture in the bowstring that aligns the eye with the sight housing. Its height must match the archer’s natural anchor. Moving the head to find the peep makes alignment less repeatable. Peep installation and string work should be performed with appropriate equipment.

Stabilizer, dampers, and wrist sling

A stabilizer moves mass forward to influence balance, aiming behavior, and post-shot movement. Side rods can counter quiver or sight weight. Dampers reduce vibration but do not repair loose components or poor tune. A wrist sling helps the archer maintain a relaxed hand without grabbing the bow after release.

A ready-to-hunt package may also include a quiver and basic sight, rest, peep, loop, and stabilizer. Compare what is included with the priorities in our compound bow beginner guide before replacing accessories simply because another model looks different.

Key Compound Bow Measurements

Published specifications are a starting point. Accessories change finished mass and balance, while modules and limb settings affect fit. Use the model manual and a bow scale rather than estimating.

Safe Compound Bow Parts Inspection

• Inspect limbs and pockets in bright light for cracks, splinters, movement, or impact damage.
• Check string and cable strands, serving, D-loop, and peep orientation.
• Confirm sight, rest, stabilizer, quiver, and module fasteners are secure to specification.
• Look for unusual cam lean, cable contact, axle movement, or noise without disassembling the bow.
• Inspect every arrow, nock, insert, and vane before loading it.
• Stop shooting after a dry fire, derailment, drop, abnormal sound, or visible structural damage.

If you are learning the shooting sequence as well as the hardware, read how a compound bow works. Understanding which components carry load helps explain why some adjustments are safe for the owner and others belong in a professional shop.

Sources and Further Reading

• Archery Trade Association: Technical Guidelines
• Bowtech: Current Owner Manuals and Specification Charts
• Bear Archery: Compound Bow Component and Service Guidance