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Limit Switch Pneumatic Balancer Series
Knight’s External Limit Switch Balancer incorporates up to two (2) spring loaded rod assemblies, two (2) limit switches and an external retract control to allow the customer the ability to relay an air pilot signal when predetermined heights have been achieved. Mounted to the bracket is a 5-way pneumatics valve that is de-actuated by the position flag as the balancer travels upward. The external retract control is an adjustable safety feature that regulates the balancer’s speed of vertical travel.
The external retract control puts resistance on the thrust bearing allowing the cable or chain to slowly retract into the air balancer to ensure that any runaway load comes to an immediate and complete halt.
When specifying a pneumatic balancer, it is recommended for working loads to use 80% of the operating capacity for lifting applications. This approach compensates for the normal fluctuations within the plant compressed air supply. Working loads include part weight and handling device weight. Balancers are rated at 100 psi [6.8bar] therefore use the following example to calculate exact operating capability.
Formula for pneumatic balancer sizing:
Example: plant air 60 psi, 350 air balancer, 80% load capability (0.60 air supply x 350 lbs. = 210 x .80 = 168 lbs. operating capability).
Single LS Cable Series Model Numbers:
KBA150-076-LS1, KBA150-076-LS2, KBA225-073-LS1, KBA225-073-LS2, KBA225-110-LS1, KBA225-110-LS2, KBA350-073-LS1, KBA350-073-LS2, KBA450-054-LS1, KBA450-054-LS2, KBA500-080-LS1, KBA500-080-LS2, KBA700-054-LS1, KBA700-054-LS2
Single LS Chain Series Model Numbers:
KBC150-070-LS1, KBC150-070-LS2, KBC200-110-LS1, KBC200-110-LS2, KBC225-067-LS1, KBC225-067-LS2, KBC350-067-LS1, KBC350-067-LS2, KBC450-052-L1, KBC450-052-LS2, KBC500-080-LS1, KBC500-080-LS2, KBC700-052-LS1, KBC700-052-LS2
Dual Chain (SDS) LS Chain Series Model Numbers:
KBC250S-054-LS1, KBC250S-054-LS2, KBC450S-052-LS1, KBC450S-052-LS2, KBC500S-084-LS1, KBC500S-084-LS2, KBC700S-052-LS1, KBC700S-052-LS2
Reeved LS Cable Series Model Numbers:
RKBA450-036-LS1, RKBA450-036-LS2, RKBA450-033-LS1, RKBA450-033-LS2, RKBA700-036-LS1, RKBA700-036-LS2, RKBA1000-040-LS1, RKBA1000-040-LS2, RKBA1400-027-LS1, RKBA1400-027-LS2
Reeved LS Chain Series Model Numbers:
RKBC400-055-LS1, RKBC400-055-LS2, RKBC450-033-LS1, RKBC450-033-LS2, RKBC700-033-LS1, RKBC700-033-LS2, RKBC1000-040-LS1, RKBC1000-040-LS2, RKBC1400-026-LS1, RKBC1400-026-LS2
Tandem LS Cable Series Model Numbers:
TKBA700-073-LS1, TKBA700-073-LS2, TKBA1000-080-LS1, TKBA1000-080-LS2, TKBA1400-054-LS1, TKBA1400-054-LS2
Tandem LS Chain Series Model Numbers:
TKBC700-067-LS1, TKBC700-067-LS2, TKBC1000-080-LS1, TKBC1000-080-LS2, TKBC1400-052-LS1, TKBC1400-052-LS2
To see examples of custom Balancer applications designed by Knight, visit our Gallery.
Resources
Installation Guides
+
Air Balancer Trouble Shooting Guide (Netherlands)
Air Balancer Troubleshooting Guide-2017
Air Balancer Troubleshooting Guide-2021
Air Connection with Balancer Logic Box
Air Connection with Balancer Manifold
External Safety Retract Control Information
Eye Bolt Safety Cable Installation Instructions
Safety Cable Installation Instructions End Trucks, Hangers, Trolleys
General Information
+Features
- CE Compliant.
- Cable or Chain.
- Hands-Free Operation.
- Standard “Float” Mode.
- Requires Non-Lubricated Clean/Dry Air.
- Max. Balancing Capacity: Up to 1400 lbs. [635kg].
- Standard Travel: Up to 110 in. [2794mm].
Benefits
- Optional High Relieving and Feathertouch Controls.
- Multiple Suspension Kits Available.
Single LS Cable Series Specifications
+Single LS Cable Series Pneumatic Balancers
| Model Number | Rated Capacity lbs. [kg] | Maximum Travel in. [mm] |
|---|---|---|
| KBA150-076-LS1 | 150 [68] | 76 [1930] |
| KBA150-076-LS2 | 150 [68] | 76 [1930] |
| KBA225-073-LS1 | 225 [102] | 73 [1854] |
| KBA225-073-LS2 | 225 [102] | 73 [1854] |
| KBA225-110-LS1 | 225 [102] | 110 [2794] |
| KBA225-110-LS2 | 225 [102] | 110 [2794] |
| KBA350-073-LS1 | 350 [159] | 73 [1854] |
| KBA350-073-LS2 | 350 [159] | 73 [1854] |
| KBA450-054-LS1 | 450 [204] | 54 [1371] |
| KBA450-054-LS2 | 450 [204] | 54 [1371] |
| KBA500-080-LS1 | 500 [227] | 80 [2032] |
| KBA500-080-LS2 | 500 [227] | 80 [2032] |
| KBA700-052-LS1 | 700 [317] | 52 [1320] |
| KBA700-052-LS2 | 700 [317] | 52 [1320] |
Single LS Chain Series Specifications
+Single LS Chain Series Pneumatic Balancers
| Model Number | Rated Capacity lbs. [kg] | Maximum Travel in. [mm] |
|---|---|---|
| KBC150-070-LS1 | 150 [68] | 70 [1778] |
| KBC150-070-LS2 | 150 [68] | 70 [1778] |
| KBC200-110-LS1 | 200 [91] | 110 [2794] |
| KBC200-110-LS2 | 200 [91] | 110 [2794] |
| KBC225-067-LS1 | 225 [102] | 67 [1701] |
| KBC225-067-LS2 | 225 [102] | 67 [1701] |
| KBC350-067-LS1 | 350 [159] | 67 [1701] |
| KBC350-067-LS2 | 350 [159] | 67 [1701] |
| KBC450-052-LS1 | 450 [204] | 52 [1320] |
| KBC450-052-LS2 | 450 [204] | 52 [1320] |
| KBC500-080-LS1 | 500 [227] | 80 [2032] |
| KBC500-080-LS2 | 500 [227] | 80 [2032] |
| KBC700-052-LS1 | 700 [317] | 52 [1320] |
| KBC700-052-LS2 | 700 [317] | 52 [1320] |
Dual Chain (SDS) LS Series Specifications
+Dual Chain (SDS) LS Series Pneumatic Balancers
| Model Number | Rated Capacity lbs. [kg] | Maximum Travel in. [mm] |
|---|---|---|
| KBC250S-054-LS1 | 250 [113] | 54 [1371] |
| KBC250S-054-LS2 | 250 [113] | 54 [1371] |
| KBC450S-052-LS1 | 450 [204] | 52 [1320] |
| KBC450S-052-LS2 | 450 [204] | 52 [1320] |
| KBC500S-084-LS1 | 500 [226] | 84 [2133] |
| KBC500S-084-LS2 | 500 [226] | 84 [2133] |
| KBC700S-052-LS1 | 700 [317] | 52 [1320] |
| KBC700S-052-LS2 | 700 [317] | 52 [1320] |
Reeved LS Series Specifications
+Reeved LS Cable Series Pneumatic Balancers
| Model Number | Rated Capacity lbs. [kg] | Maximum Travel in. [mm] |
|---|---|---|
| RKBA450-036-LS* | 450 lbs [204kg] | 36 in [914mm] |
| RKBA450-033-LS* | 450 lbs [204kg] | 33 in [818mm] |
| RKBA700-036-LS* | 700 lbs [318kg] | 36 in [914mm] |
| RKBA1000-040-LS* | 1000 lbs [454kg] | 40 in [1016mm] |
| RKBA1400-027-LS* | 1400 lbs [635kg] | 27 in [685mm] |
*When ordering, specify LS1 or LS2 for (1) Limit Switch or (2) Limit Switches.
Reeved LS Chain Series Pneumatic Balancers
| Model Number | Rated Capacity lbs. [kg] | Maximum Travel in. [mm] |
|---|---|---|
| RKBC400-055-LS* | 450 lbs [204kg] | 55 in [1397mm] |
| RKBC450-33-LS* | 450 lbs [204kg] | 33 in [818mm] |
| RKBC700-033-LS* | 700 lbs [318kg] | 33 in [818mm] |
| RKBC1000-040-LS* | 1000 lbs [454kg] | 40 in [1016mm] |
| RKBC1400-026-LS* | 1400 lbs [635kg] | 26 in [685mm] |
Tandem LS Series Specifications
+Tandem LS Cable Series Pneumatic Balancers
| Model Number | Rated Capacity lbs. [kg] | Maximum Travel in. [mm] |
|---|---|---|
| TKBA700-073-LS* | 700 lbs [318kg] | 73 in [1854mm] |
| TKBA1000-080-LS* | 1000 lbs [454kg] | 80 in [2032mm] |
| TKBA1400-054-LS* | 1400 lbs [635kg] | 54 in [1371mm] |
*When ordering, specify LS1 or LS2 for (1) Limit Switch or (2) Limit Switches.
Tandem LS Chain Series Pneumatic Balancers
| Model Number | Rated Capacity lbs. [kg] | Maximum Travel in. [mm] |
|---|---|---|
| TKBC700-067-LS* | 700 lbs [318kg] | 67 in [1701mm] |
| TKBC1000-080-LS* | 1000 lbs [454kg] | 80 in [2032mm] |
| TKBC1400-052-LS* | 1400 lbs [635kg] | 52 in [1320mm] |
Videos
+*Air Balancer – Setting Chain Length
*Applications Compilation
*BPA2113 Hook – Setting Pin into Chain Link
*Pneumatic Rotary Union for Air Balancers
*Standard Balancer VS. External Retract Balancer
Air Balancer Cable Hook Installation
Air Balancer Manifold & Control Handle Installation
Air Balancer Safety Cable Kit Installation
Air Balancer to Rail Installation
Air Balancer Trolley Installation
Accessories
General
+
- Steel Construction
- Measures Knight 4mm & 5mm Galvanized Chain Wear.
- 360 degree rotation.
- Steel Construction.
- Connection for Safety Chain.
- Quick and Secure Connection.
- (Carbon Steel) Crosby® Bullard Hook w/ Self Closing Gate.
- Quick and Secure Connection
- 360 degree rotation.
- 360 degree rotation.
- Forged Alloy Steel – Quenched and Tempered.
- Connection for Safety Chain.
- Nylon Safety Cover.
- Quick and Secure Connection.
- Lif-Lok® Gate.
- Suitable for infrequent, non-continuous rotation under load.
- Typically used with Knight’s KBA Cable Balancers
- Open bend keeps the load inline with the chain.
- Open bend allows for ease of engaging and disengaging the load.
- Use in corrosive environment requires shank and nut inspection in accordance with ASME B30.10-1.10.4(b)(5)(c)2009.
- Pulley enclosed with steel safety guard.
- Available with a bullard swivel hook or a shackle.
- Used with Knight’s RKBA Reeved Cable Balancers.
Load Trolley
+
- Fiberglass filled High Impact Nylon Wheels.
- Side Guide Rollers with integrated bearings.
- Double-shielded wheel bearings keep dirt out, and do not require lubrication.
- Min/ Max Continuous Service Temp at 100% load: -20 degs. F to 248 degs. F.
- Fiberglass filled High Impact Nylon Wheels.
- Side Guide Rollers with integrated bearings.
- Double-shielded wheel bearings keep dirt out, and do not require lubrication.
- Min/ Max Continuous Service Temp at 100% load: -20 degs. F to 248 degs. F.
- Recommended for the optimum Balancer Load Trolley.
- Fiberglass filled High Impact Nylon Wheels.
- Side Guide Rollers with integrated bearings.
- Double-shielded wheel bearings keep dirt out, and do not require lubrication.
- Min/ Max Continuous Service Temp at 100% load: -20 degs. F to 248 degs. F.
- Double-shielded wheel bearings keep dirt out, and do not require lubrication.
- Prevents drag on the load trolley.
- Min/ Max Continuous Service Temp at 100% load: -20 degs. F to 248 degs. F.
- Travels on a W-Beam, I-Beam and Patented Track.
- Steel Wheels.
- Double-shielded wheel bearings keep dirt out, and do not require lubrication.
- Travels on a S-Beam.
- Steel Wheels.
- Double-shielded wheel bearings keep dirt out, and do not require lubrication.
Safety Cables
+
- (4) Crosby® Saddle Clamps
- (2) Cable Thimbles
- (2) Eye Bolts
- (1) Safety Cable made of a carbon steel 7 (strand) x 19 (wires) Galvanized Wire Rope (GWR).
- (2) Copper Oval Sleeves
- (2) Cable Thimbles
- (1) Safety Cable made of a carbon steel 7 (strand) x 19 (wires) Galvanized Wire Rope (GWR).
- Used as Knight’s standard safety cable kit.
- (4) Crosby® Saddle Clamps
- (2) Cable Thimbles
- (1) Safety Cable made of a carbon steel 7 (strand) x 19 (wires) Galvanized Wire Rope (GWR).
Pneumatic Controls
+
- Air logic box and bracket.
- Logic box to balancer air bracket connection hose fitting
- Manifold to Balancer Air Bracket Connection to Hose Fitting.
- Air Manifold and Control Handle.
- Supports a constant weight at zero gravity.
- Ideal for balancing fastening tools.
- Balances a single object without requiring the need for a separate pendant control.
- Allows for a hands free operation.
- Does not allow for variances in weights.
- Assists in increasing the air volume.
- Exhausts the air in a more efficient manner.
- BCS2090 – Loads under 250 lbs. [113kg].
- BCS2322 – Loads UP TO 500 lbs. [227kg].
- Eliminates the need for a separate pendant.
- Allows the operator to control the up and down movements close to the part.
- Horizontal handle (BCS2213)
- Vertical handle (BCS2214)
- Controls (2) different weights at zero gravity.
- Pendant buttons control which balance the operator desires.
- Primarily used in hands free applications where the operator picks up a part and sets it down.
- Dual balance creates a zero gravity for the end effector with or without a part.
- Ergonomic Handle Grip.
- Thumb Lever Guards to protect for inadvertent depressing of control levers.
- (1) BPA9050B Pneumatic Block.
- 2-way valves used for a single acting air balancer or lift assist that is used for up/ down movement.
- Ergonomic Handle Grip.
- Thumb Lever Guards to protect for inadvertent depressing of control levers.
- (1) BPA9050B Pneumatic Block.
- 2-way valves for up/ down movement.
- Ergonomic Handle Grip.
- Thumb Lever Guards.
- Manifold kit included.
