Davis 2400 Shockles Line Snubber

Product Information

The Shockles LineSnubber is available in two colors: Blue (#2400) and Black (#2410). It is designed to reduce dangerous shock loads and absorb in-line shock. The LineSnubber can be used with various types of ropes and lines, including leashes, cleats, anchor
gears, and rigging. It should always be used in parallel with a strong rope or line and should not bear a full load alone. The LineSnubber is not intended for direct suspension or holding of loads, climbing, or use as a static line. It is recommended to consult with a qualified engineer for any special applications.

Product Usage Instructions

Rigging and Safety:

• Shockles should never bear the full load alone. Always rig the LineSnubber in tandem with the line so that the line bears the load when the LineSnubber is stretched.
• The optimum slack that should be allowed in a load bearing line is six inches or less (15 cm).
• Rigging Options:

Method 1 – Davis LineGrabber:

Use the optional accessory LineGrabber (#2460) to attach the LineSnubber quickly and easily on any line up to 1″ (25 mm). Attach the LineGrabber anywhere along the line using a Prusik hitch climbing knot. LineGrabbers are sold in pairs and allow for easy
adjustment during setup or when changing attachment location.

Method 2 – Clove Hitch Knot:

Use a simple clove hitch to attach the LineSnubber to lines up to 3/4″ (19 mm) in diameter.

1. Form two loops. The left loop is nearer, and the right loop is further away.
2. Extend your left arm slightly, taking the left loop further away.
3. Move the left loop behind the right one, forming the hitch.
4. Snap your Shockle to the constricting loop. The more you pull, the tighter it becomes.
5. Maximum Recommended Working Stretch:
   • Relaxed position: 28″ (71 cm)
   • Stretched 4″ (10 cm) to 32″ (81 cm)
   • Stretched 8″ (20 cm) to 36″ (91 cm)
6. Suggested Uses for Shockles LineSnubber:
   • Docklines
   • Anchor snubber
   • Boom preventer
   • Tender towing
   • Boom tie down
   • Tender tie down

Reduce Dangerous Shock Loads

Shockles are THE SHOCK ABSORBING SOLUTION that minimizes stress on ALL lines. With the progres-sive tension design and patented Internal Stretch Limiter, the further it stretches, the greater the return force.
For marine applications:

• Davis LineSnubber is a multi-purpose shock absorb-er for use on any boat
• Patented design reduces shock to any line, cleat or ground tackle, including bow rollers and rigging
• Attaches, adjusts or removes quickly and easily; use a simple clove hitch or buy a pair of Davis LineGrabbers™ (#2460)
• Reduces or eliminates all noise from creaking, groaning dock lines or ground tackle—jarring is minimized too
• Increases the life of dock or anchor lines by reduc-ing chafe
• Compensates for tidal surge and chop from wind waves
• When rigged properly, LineSnubber keeps boats centered in the slip
• Excellent as both a dock line snubber and anchor snubber
• One size serves most applications, or double up and use two LineSnubbers side-by-side on heavier boats
• Available in two colors, blue or black

WARNING:

• Always use Shockles in parallel with a strong rope or line. Never allow Shockles to bear a full load alone. Shockles are designed to absorb in-line shock only.
• Do not use any Shockles product to directly suspend or hold any loads or as a personal tether. Not for climbing or for use as a static line.
• Always consult with a qualified engineer for any special applica-tions.

RIGGING AND SAFETY

Shockles are strong, but it is important that they be rigged correctly. Shockles should never bear the full load alone—always rig in tandem with the line so the line bears the load when Shockles are stretched. In most applications, the optimum slack that should be allowed in a load bearing line is six inches or less (15 cm). That is all the slack that is usually needed for Shockles to do their job.

These two photos show LineSnubber rigged in-line with the load. The slack can be seen dangling in the photo on the left. In the photo on the right, the slack has been ‘neatened up’ by wrapping it around the snubber. In most cases two or three wraps will equal 4–6″ (10–15 cm).

RIGGING OPTIONS

Two methods of attaching LineSnubber:

Davis LineGrabber, #2460, an optional accessory
LineGrabber makes attaching LineSnubber fast and simple on any line up to 1″ (25 mm). LineGrabber is made of high modulus polyethylene line with a loop sewn in each end. It is attached anywhere along the line by using a simple climbing knot called a Prusik hitch. LineGrabbers are sold in pairs and allow for easy adjustment during initial setup or when changing attachment location.

Clove Hitch Knot
The other way to attach LineSnubber is by using a simple clove hitch (see instructions on next page). The clove hitch is not as easily adjustable as LineGrabber, but is perfectly acceptable on all line up to 3/4″ in diameter (19 mm).

NEVER allow LineSnubber to bear the full load.
Instead, always rig LineSnubber in-line, leaving 32–36” (81–91 cm) of working slack between the carabiners.

MAXIMUM RECOMMENDED WORKING STRETCH

Suggested Uses for Shockles LineSnubber

allows for 4–8” of stretch (10–20 cm)

| Keeps boat nicely centered between docks; reduces shock load to lines and cleats. Reduces or eliminates jarring and line noise. Increases life of dock lines.
ANCHOR| 34–36” (86–91 cm)| Reduces wear on anchor rode; helps keep anchor
SNUBBER| allows for 6–8” of stretch (15–20 cm)| from shifting. Absorbs shock loads to bow roller, windlass and cleats. Quiets noise from anchor rode.

See Davis AnchorSnubber™ #2420, designed for use with

 |  | all-chain ground tackle.
BOOM| 34–36” (86–91 cm)| Minimizes dramatic shock loads to boom, preventer
PREVENTER| allows for 6–8” of

stretch (15–20 cm)

| line and attachment points. Good choice for sailing

off the wind or stabilizing the boom on trawlers.

TENDER| 32–34” (81–86 cm)| Reduces stress on towing line, protects weak
TOWING| allows for 4–6” of stretch (10–15 cm)| attachment points on tender, keeps tender from surging forward and snapping back at the end of the line.
BOOM| 30” (76 cm) allows for| Keeps boom on sailboat or trawler from swinging
TIE DOWN| 2” of stretch (5 cm)| freely, reduces static load on rigging.
TENDER TIE DOWN| n/a| Secures inflatable on deck. Shockles will expand

or relax as temperature changes cause the inflatable to expand or contract, holding the dinghy snugly.

SPINNAKER| 32–34” (81–86 cm)| Minimizes pressure on nylon sails caused by gusts
TACK| allows for 4–6” of stretch (10–15 cm)| or running into back of wave after surfing, normalizes tension on sails.
TILLER LEASH| n/a| Keeps tiller in place at the dock or under way, protects rudder by reducing shock load in case of collision with underwater object.

See the full line of SHOCKLES® shock absorbing solutions

at www.davisinstruments.com

Unique designs engineered in the USA. Patented.

Shockles LineSnubber
Reduces tension on dock lines—compensates for surge. Patented line stretch limiter and progressive tension design. Also useful for towing, tie-downs and preventers. Two 316 s.s. carabiners. 20 inches (51 cm) long.

2400 Blue

2410 Black

DockShockle
Designed for smaller, lighter boats up to 40 feet (12 m). Two 7 inch (18 cm) Mini-LineGrabbers included for quick and easy at-tachment or adjustment. Use on braided or twisted line from 3/8″ to 3/4″ (10–19 mm).
12 inches (31 cm) long. #2415 Black

AnchorSnubber
Reduces tension on anchor chain, rode or snubber line. Eliminates chain noise and shock loads in bumpy anchorages. Helps keep anchor set. Protects roller, wind-lass and cleats. Two 316 s.s. cap-tive key pin shackles. 20 inches (51 cm) long.

2420 Black

LineGrabber
Add a strong, instant attachment point to any line up to 1” (25 mm) by using a simple Prusik hitch. LineGrabber is made of UV re-sistant, Ultra High Modulus Fiber rated at 2200 pounds SWL (1000 kg). A great companion product for use with Shockles LineSnubber. Measures 9″ (23 cm) long with a spliced & sewn loop at each end.

2460 Pair

MiniShockle
This is a bungee cord on steroids! MiniShockles hold up to 300 lbs. (136 kg) to protect your valuable gear. Ten times stronger than a standard bungee cord.

2430 Black 12″ (31 cm)

2440 Black 18″ (46 cm)

2445 Black 24″ (61 cm)

FenderFriend
The world’s only fender whip with a built-in shock absorber. Stretches up to 12” (31 cm) to protect rails, cleats, stanchions and lifelines from shock loads. Nexus® nylon buckle makes deploying fenders a snap. Adjusts from 16–72″
(0.4–1.8 m) to fit most boats.

2450 Twin eye, black

2455 Center tube, black

Davis Instruments
3465 Diablo Avenue, Hayward, CA 94545, U.S.A. Phone 510-732-9229 • Fax 510-732-9188 info@davisinstruments.com
For information about our other fine products, visit www.davisinstruments.com

References

• Davis Instruments

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>