Choose the right wire puller

This page contains general guidelines to assist you in selecting the right puller for your operation. If you have any further questions or a specialty application, we invite you to contact our engineering team by calling 508-987-3206 or by emailing sales@sjogren.com.

An important variable to consider is operator preference: What style puller is the operator currently using? What does the operator like/dislike about the current operation?

Additional wire/die pull data you will need includes:

• Pointed wire diameter/pointed wire diameter range
• Maximum die-pull (see below)
• Wire tensile strength
• % reduction area (see K Factor – % Reduction Table below)
• Wire toughness or hardness
• Type of drawing block hookup
• Length of puller assembly needed

PULLER STYLE COMPARISON

Morgan-style
Robust, heavy-duty construction grip with capacities up to 1″ diameter and 40,000 lbs. of pull

• Simple spring loading to operate jaws simultaneously
• Elliptically designed spring seat to mount grip to standard lifting chain
• Heavy-duty construction to allow high die pull
• Optional clevis to enable tangent die pull
• Simple jaw design, easily replaced without tools
• Additional hook-up options are available

Typical Applications: Wire-drawing machines with a link chain and connected to the drawing block with an oblong link slipped over a post at the top of the block

Vaughn-style
Medium-duty construction grip with capacities up to 1.25″ diameter and 50,000 lbs. of pull

• One piece casting to make it lightweight
• Quick-release hook to release tension quickly from puller
• Simple jaw design, easily replaced without tools
• Additional hook-up options are available

Typical Applications: Wire-drawing machines with a leaf-style chain and a quick-release hook assembly for releasing tension after the pull. Larger sizes use link chain and oblong link hooks. NOTE: Vaughn style quick-release hooks must be used with Vaughn style blocks

Sleeper & Hartley-style
Light-duty construction grip with capacities up to .5″ diameter and 10,000 lbs. of pull

• Simple attachment to standard roller chain makes it economical
• Optional thumb release for single hand operation
• Simple jaw design, easily replaced without tools
• Additional hook-up options are available

Typical Applications: Uses a roller chain and a pin-type hook that fits into a radial hole in the drawing block. Thumb-release pullers are used to ease loading and unloading of the wire grip. Pulling the back latch retracts the jaws into the body and holds them open. Units are completely interchangeable with standard S&H grip heads.

ACCESSORIES

Spring Loaded Safety Chain
Designed to enhance an operator’s safety by tensioning the puller assembly while stringing up the drawing block. Eliminates the need for the operator to hold the assembly in place during start-up.

• Standard length chain with a master link for each end to connect to the puller and hook, and any additional accessories desired
• Teflon wear pads fastened to the bent links of chain which contact the drawing block

Typical Applications: Used when block marking is a problem, when operator safety is a concern, and/or when you have less than 5,000 lbs. of die pull

Aluminum Shoes
Mount to the bottom of the puller bodies; present a soft, wearable surface to minimize marking of the drawing block.

• Easy to attach and replace
• Affixed with strong adhesive
• Economical approach to minimize block marking

Special jaws
Special jaws with straight or diagonal teeth, and a finer tooth pattern than standard jaws, can be supplied for harder, tougher materials that allow limited penetration. Puller assemblies are typically supplied with standard jaws of the proper size tooth pattern to match the wire-diameter range for medium and low carbon steel and non-ferrous material.

CALCULATING DIE PULL

Die-Pull Calculation:*

P=43.56d [2] x SK
P = die pull in pounds
d = diameter after drawing in inches (in)
S = tensile strength before draft, in pounds per square inch (PSI)
K = factor which varies with the percentage reduction as shown in K Factor—% Reduction Table below

K Factor—% Reduction Table**

*Die-Pull Calculation from Steel Wire Handbook, Volume 1, The Wire Association, page 235
**K Factor—% Reduction Table from Steel Wire Handbook, Volume 1, The Wire Association, page 236