Published on July 18, 2013
Phone: 1-800-544-8978 Caster Connection, Inc. Fax: 1-888-852-7202 Ergonomic Casters and Wheels www.casterconnection.com Why They Matter
THE RIGHT CASTERS AND WHEELS CAN PREVENT INJURIES 2 www.casterconnection.com Required push/pull force is the most important component of ergonomic performance regarding the manual moving of carts with casters. The weight load of the cart (and its cargo) being moved is important, however the casters and wheels the cart is being moved upon play a key role in the ease with which the cart is moved.
3 PUSH RATHER THAN PULL Pushing a cart is preferable to pulling because: • Workers moving the cart don’t put themselves at risk for being run into or their feet being run over by the rolling cart • The path of movement is more visible while pushing facing forward versus occasionally turning around while pulling • Pulling puts the shoulders and back in an awkward position • Force is generated more easily with pushing than it is with pulling
ERGONOMICS’ FINANCIAL IMPACT 4 • Quality of Output • Health & Safety • Productivity are affected financially when there’s a poor combination of • Tools • People • Work • The reduction of unnecessary and/or awkward movements reduces the time and effort necessary to complete a task
5 WHEELS’ ROLE IN ERGONOMICS • Wheel Composition • The resiliency of the wheel is an important factor in determining how the wheel performs when rolling over physical barriers such as thresholds or debris. • Softer (lower durometer) wheels to some extent conform to the shape of the object(s) that they roll over, meaning debris and barriers do not typically cause damage to softer wheels. • Wheels that have the proper durometer and resiliency reject embedding of debris and flat-spotting. Embedding typically occurs in hard, non-resilient wheels and can cause floor damage, added rolling resistance, increase noise and vibration. • Harder wheels typically roll easier than soft wheels. When using hard wheels, one must consider the likelihood of the wheels encountering debris and the floor type.
6 WHEELS’ ROLE IN ERGONOMICS (CONT.) • Wheel Diameter • The larger the diameter of a wheel, the lower the rolling resistance will be. While this is an important factor, it is frequently overlooked. • The more uneven or coarse a floor is, the larger the wheel’s diameter should be. Rough floor conditions may include thresholds, debris, grates, etc.
The CC Apex wheel was developed after a major automotive manufacturer approached Caster Connection looking for a solution to the problems they faced in their tow line applications. Those problems included: • Push/Pull Ergonomics • Debris Retention • Increasing Weight Requirements The CC Apex ’s high quality polyurethane • Dramatically reduced push/pull force requirements with its incredible rebound and resiliency • Eliminated all debris retention in the wheel, thus maintaining easy maneuverability and protecting the flooring • Provided the necessary load capacities for the increasing weight in the customer’s applications 7 A WHEEL THAT MEETS ERGONOMIC NEEDS
Type of Raceway • Traditional Kingpin Swivel Caster • Composed of an upper and lower ball race held together with a nut and bolt or riveted kingpin • Kingpinless Swivel Caster • Composed of a forged inner and outer race that are held together by the ball bearings • Maintenance-Free Swivel Caster • Composed of a sealed precision-ball or other sealed- ball raceway 8 RIG/FORK ROLE IN ERGONOMICS
9 RIG/FORK ROLE IN ERGONOMICS (CONT) Type of Raceway • Traditional Kingpin Swivel Caster • Load is concentrated on the kingpin, ball bearings float freely in raceway, causing spikes in push/pull • Kingpinless Swivel Caster • Load is concentrated on the ball bearings, ball bearings float freely in raceway, causing some spikes in push/pull • Maintenance-Free Swivel Caster • Load is concentrated on primary thrust bearing, which has seated ball bearings, and the secondary load bearing; this allows for even dispersion of load reducing push/pull
10 RIG/FORK ROLE IN ERGONOMICS (CONT) Length of the Swivel Lead • Swivel Lead • The distance from the axle hole to the center of the swivel raceway • Standard Lead • Like it’s name implies, the standard lead is the most common variation in caster forks - this length varies with the diameter of the caster • Extended Lead • Longer swivel lead than the traditional standard lead
11 RIG/FORK ROLE IN ERGONOMICS (CONT) By increasing the length of the Swivel Lead • Chatter/Flutter is reduced in towing applications, in addition to • Reducing noise • Prolonging the life of the product as unnecessary stress is eliminated • Required push/pull force is reduced • By extending the lead, the caster naturally settles into the trailing position • Due to the caster rotating much more easily and freely
The CC Peak Maintenance-Free Swivel Caster is designed to meet the demanding requirements of manufacturing environments. Those requirements include • Push/Pull Ergonomics • Durability – Stands up to abuse • No maintenance required The CC Peak ’s Robust Ergonomic Design • Dramatically reduces push/pull force requirements with its precise raceway and extended lead • Stands the test of time and abuse with the thick forged steel legs/raceway • Requires no maintenance with the sealed raceway and lifelong grease 12 A CASTER THAT MEETS ERGONOMIC NEEDS Caster Featuring CC Apex wheel w/ CC Peak rig
NEXT STEP: CONTACT US! Contact us today for solutions to your caster, wheel and hand truck needs. Our expert sales staff and product availability will ensure that you implement the proper product the 1st time. Still want more info? Check us out via these sources: 13 www.casterconnection.com email@example.com
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