News And Updates

Workholding solutions in  the pipe

from Leader

Workholding specialist Leader Chuck Systems now offers an extensive range of oil country chucks from Polish workholding manufacturer, Bison-Bial. The Tamworth-based company  is a distributor for the sale of Bison’s extensive cost-effective product range, which includes pre-sales technical support, stocks of popular items and spare parts being held at Leader’s dedicated logistics facility in Leamington Spa.

Industry-specific products like the oil country chucks designed and produced by Bison provide focused workholding solutions, and highlight how the company listens to its customers and develops robust and efficient answers to the manufacturing problems they face. These high quality oil country chucks are ideally suited to the oil, gas and petrochemical industry sectors for customers with demanding workholding applications. The extensive range of large through-hole chucks provides a solution for any manufacturer turning long, large diameter parts.

Mark Jones, Leader Chuck Systems’ managing director, says: “Heavy-duty oil country chucks are designed as an addition to the Bison chuck range. The chucks are dedicated to finishing, medium duty and heavy duty machining applications. Bison oil country chucks are available to suit most spindle mount designs and the most popular sizes are available quickly.”

Like all chucks from Bison, the oil country chucks are made from forged steel or cast iron. And, all of the working surfaces are induction hardened and ground to ensure that the finished product is a rugged chuck that meets high sliding, stability, and durability parameters that customers have come to expect from the company.

All of the 3-jaw self-centring chucks can work individually or in pairs, mounted on opposite sides of the lathe spindle, ensuring the same vertical position of the jaws in both chucks. This allows the accurate turning of very long components such as pipes.

The cast iron bodied Type 3295 3-jaw self-centring chuck offers a large through-hole compared to the outside diameter of the chuck body. Chuck body sizes are 400, 500, 660 and 800mm diameter with the ability to hold parts from 168 up to 566mm diameter. Maximum operational speeds range from 500rpm down to 200rpm for the largest chuck.

Providing increased rigidity and greater wear resistance, the steel bodied Type 3597 provides higher gripping forces and can withstand increased machining forces. This allows the chuck to operate at between 2,500rpm and 700rpm for the 315 and 800mm diameter chucks respectively, with the bore through ranging from 145 to 460mm diameter.

Also employing a steel body, the extensive heavy-duty Type 3515 HD range supports through-hole, face and internal fixturing for all turning applications. Available in 400, 500, 630 and 800mm diameter the chucks can hold parts between 25 and 800mm diameter. The gripping force ranges from 6,200daN for the smallest chuck up to 9,000daN for the largest, and the maximum operating speed is 1,400 and 600rpm respectively.

All of the heavy-duty 4-jaw independent chucks feature forged steel bodies and can work individually or in pairs, mounted on opposite sides of the lathe spindle, ensuring the same vertical position of the jaws in both chucks. This allows high gripping forces and the accurate turning of very long components such as pipes, flanges, valve bodies and long prismatic parts.

Available in an extensive range of sizes the Type 4317 HD can hold parts between 45 and 1250mm diameter with a gripping force of up to 5,000daN per jaw. Through-hole sizes go from 136mm diameter for the 415mm diameter model up to 530mm diameter for the 1m diameter version.

Type 4347 HD provides a high precision workholding solution for manufacturers that require increased gripping accuracy to generate tight tolerance parts. Available as 415, 500 or 710mm diameter models, the chucks can accurately hold parts between 45 and 710mm diameter. While the 1000 or 1250mm diameter Type 4307 HD has a gripping range between 50 and 1,250mm diameter and a 200mm diameter through-hole on both sizes.

Supplied as standard with hard master jaws all chucks can be specified with soft or hard top jaws. And, most models feature reversible jaws to accommodate internal and external chucking operations. Mountings are available for standard or special spindles.

Each chuck is thoroughly inspected before the product leaves the factory. With checks for gripping force and run-out to ensure accuracy in order to meet Bison’s quality standards that exceed all DIN standards. Only then is the chuck given the Bison label of quality.

Founded in 1948, Bison is Poland’s largest manufacturer of machine tool ancillary products. Today, the ISO 9001 accredited company employs around 600 people and produces a wide range of standard manual chucks, many of which are available with cast iron or steel bodies. With diameters ranging from 80 – 2000mm the standard manual chucks are available with 2-, 3-, 4- and 6-jaws, and various internal/external hard and soft jaw configurations are offered. Geared scroll self-centring, independent and combination models provide robust fixturing for the turning of raw material or parts.