Retract Control

External Retract Control Air Balancer Series

KBA/KBC-EX Mặt Cắt — **KBA/KBC-EX cross-section**

External Safety Retract Control

Series: KBA / KBC / RKBA / RKBC / TKBA / TKBC – EX

The external safety retract control is an adjustable feature that controls the vertical travel speed of the balancer. If the load is lost, the cable or chain retracts slowly into the unit instead of accelerating suddenly upward. A hydraulic damper applies resistance to the thrust bearing, giving a slow, controlled retraction.

The EX series is typically used in two specific situations:

When the tooling attached to the balancer is a light hook lifting a heavy part.
When parts tend to get stuck in the dunnage.

In both applications, the retract control prevents the cable or chain from suddenly accelerating upward, keeping the operator safe.

* Technical note: We recommend using 80% of rated capacity for lifting applications (to compensate for plant air pressure fluctuations). Units are rated at 100 psi [6.8 bar].
Example: Plant pressure 60 psi, 350 lbs unit: 0.60 × 350 = 210 × 0.80 = 168 lbs working capacity.

Features & Benefits

Features

CE compliant
Cable or chain type available
Hands-free operation
Standard "Float" mode
Built-in centrifugal retract control
Requires clean, dry, non-lubricated air
Maximum balanced load: 1,400 lbs [635 kg]
Standard travel: up to 110 in. [2,794 mm]

Benefits & Options

Optional travel limit switch
Optional High Relieving & Feathertouch controls
Multiple suspension kits available
Easy integration with Knight aluminum rail (RAD4110/6110/7510)
Supports rotary union connection
High safety – prevents sudden acceleration if the load is lost

Specifications – Single EX Series

* Note: FULLSHARP can advise on custom configurations for specific applications. Contact us for a quotation and technical drawings.

Single EX – Cable (KBA)

Model	Load lbs [kg]	Travel in. [mm]
KBA150-076-EX	150 [68]	76 [1,930]
KBA225-073-EX	225 [102]	73 [1,854]
KBA225-110-EX	225 [102]	110 [2,794]
KBA350-073-EX	350 [159]	73 [1,854]
KBA450-054-EX	450 [204]	54 [1,371]
KBA500-080-EX	500 [227]	80 [2,032]
KBA700-054-EX	700 [317]	54 [1,371]

Single EX – Chain (KBC)

Model	Load lbs [kg]	Travel in. [mm]
KBC150-070-EX	150 [68]	70 [1,778]
KBC200-110-EX	200 [91]	110 [2,794]
KBC225-067-EX	225 [102]	67 [1,701]
KBC350-067-EX	350 [159]	67 [1,701]
KBC450-052-EX	450 [204]	52 [1,320]
KBC500-080-EX	500 [227]	80 [2,032]
KBC700-052-EX	700 [317]	52 [1,320]

Specifications – Dual Chain SDS EX Series

Model	Load Capacity		Travel
	lbs	kg	in	mm
KBC250S-054-EX	250	113	54	1,371
KBC450S-052-EX	450	204	52	1,321
KBC500S-084-EX	500	226	84	2,133
KBC700S-052-EX	700	317	52	1,321

Specifications – Reeved EX Series (Double Capacity)

Reeved EX – Cable (RKBA)

Model	Load lbs [kg]	Travel in. [mm]
RKBA450-036-EX	450 [204]	36 [914]
RKBA450-055-EX	450 [204]	55 [1,397]
RKBA700-036-EX	700 [318]	36 [914]
RKBA1000-040-EX	1,000 [454]	40 [1,016]
RKBA1400-027-EX	1,400 [635]	27 [685]

Reeved EX – Chain (RKBC)

Model	Load lbs [kg]	Travel in. [mm]
RKBC400-055-EX	450 [204]	55 [1,397]
RKBC450-033-EX	450 [204]	33 [818]
RKBC700-033-EX	700 [318]	33 [818]
RKBC1000-040-EX	1,000 [454]	40 [1,016]
RKBC1400-026-EX	1,400 [635]	27 [685]

Specifications – Tandem EX Series (Dual End)

Tandem EX – Cable (TKBA)

Model	Load lbs [kg]	Travel in. [mm]
TKBA700-073-EX	700 [318]	73 [1,854]
TKBA1000-080-EX	1,000 [454]	80 [2,032]
TKBA1400-052-EX	1,400 [635]	54 [1,371]

Tandem EX – Chain (TKBC)

Model	Load lbs [kg]	Travel in. [mm]
TKBC700-067-EX	700 [318]	67 [1,701]
TKBC1000-080-EX	1,000 [454]	80 [2,032]
TKBC1400-052-EX	1,400 [635]	52 [1,320]

So Sánh: Cân Bằng Tiêu Chuẩn vs. Kiểm Soát Thu Hồi Ngoài

Tổng Hợp Các Ứng Dụng Knight Global

Cài Đặt Chiều Dài Xích Cho Air Balancer

Lắp Đặt Móc Cáp Cho Thiết Bị Cân Bằng

Lắp Đặt Manifold & Tay Điều Khiển Khí Nén

Lắp Đặt Bộ Cáp An Toàn (Safety Cable Kit)

Lắp Đặt Thiết Bị Cân Bằng Lên Ray Nhôm

Lắp Đặt Trolley Cho Thiết Bị Cân Bằng

Khớp Xoay Khí Nén Cho Air Balancer

Lắp Chốt Móc BPA2113 Vào Mắt Xích

Load Attachments & Gauges

Thước Đo Độ Mòn Xích<br /> Đo xích mạ kẽm 4mm & 5mm — Chain Wear Gauge
For 4mm & 5mm zinc-plated chainKSAA1003
0.87 lbs [0.39 kg]
Gauge

Khoá Xích An Toàn<br /> Xoay 360°, kết nối cáp an toàn — Safety Chain Shackle
360° swivel, connects the safety cableBPA2410
2.7 lbs [1.23 kg]
Shackle

Móc Xích Cân Bằng<br /> Crosby® Bullard – tự đóng — Balancer Chain Hook
Crosby® Bullard – self-closingBPA2113
2.4 lbs [1.08 kg]
Hook

Khớp Tháo Lắp Nhanh<br /> Xoay 360°, có chốt xích an toàn — Quick-Disconnect Swivel
360° swivel, with safety chain pinBPA2035
4.8 lbs [2.22 kg]
700 lbs

Móc Có Khoá Cổng Lif-Lok®<br /> Dùng với cán bằng cáp KBA — Lif-Lok® Latching Hook
For KBA cable balancersBPA2020
0.8 lbs [0.36 kg]
2,000 lbs

Ròng Rọc Cáp Reeved<br /> Tăng đôi sức tải, có tấm chắn thép — Reeved Cable Pulley
Doubles capacity, with steel guardBPA2065
4.4 lbs [2.0 kg]
Reeved

Load Trolleys

Con Chạy Tải – Ray RAD7510<br /> Tải tối đa 3.000 lbs [1.360 kg] — Load Trolley – Rail RAD7510
Max. load 3,000 lbs [1,360 kg]MRTA7706
9 lbs [4.08 kg]
RAD7510

Con Chạy Tải – Ray RAD6110<br /> Tải tối đa 1.600 lbs [725 kg] — Load Trolley – Rail RAD6110
Max. load 1,600 lbs [725 kg]MRTA6106
6 lbs [2.72 kg]
RAD6110

Con Chạy Tải – Ray RAD4110<br /> Khuyến nghị – tải tối đa 1.100 lbs — Load Trolley – Rail RAD4110
Recommended – max. load 1,100 lbsMRTA4442
5 lbs [2.26 kg]
RAD4110

Con Chạy Tải – Ray TR2000<br /> Tải tối đa 550 lbs [250 kg] — Load Trolley – Rail TR2000
Max. load 550 lbs [250 kg]TRT2001
2 lbs [0.90 kg]
TR2000

Con Chạy Tải Dầm W / I-Beam<br /> Tải tối đa 3.000 lbs [1.360 kg] — W / I-Beam Load Trolley
Max. load 3,000 lbs [1,360 kg]RTA2013
23 lbs [10.4 kg]
W-Beam · I-Beam

Con Chạy Tải Dầm S (S-Beam)<br /> Tải tối đa 3.000 lbs [1.360 kg] — S-Beam Load Trolley
Max. load 3,000 lbs [1,360 kg]RTA2014
22.1 lbs [10.2 kg]
S-Beam

Safety Cable Kits

Cáp An Toàn Tiêu Chuẩn<br /> 4 kẹp Crosby® + 2 vòng đệm — Standard Safety Cable
4 Crosby® clips + 2 thimblesRWA4133
6 ft [1.8 m] / 6 mm
Standard

Cáp An Toàn Có Bulông Móc<br /> Eye Bolt Safety Cable Kit — Eye Bolt Safety Cable
Eye bolt safety cable kitFDA4133
10 ft [3 m] / 6 mm
Eye Bolt

Cáp An Toàn Chụp Oval<br /> 2 chụp đồng oval + 2 vòng đệm — Oval Sleeve Safety Cable
2 oval copper sleeves + 2 thimblesNICORWA4133
2 lbs [0.91 kg]
Oval

Pneumatic Controls

Mô-đun Cân Bằng Đơn<br /> Lý tưởng cho dụng cụ siết — Single Balance Module
Ideal for tightening toolsBCS2018
2.2 lbs [0.99 kg]
150 lbs

Mô-đun High Relieving<br /> 2090: ≤250 lbs / 2322: ≤500 lbs — High Relieving Module
2090: ≤250 lbs / 2322: ≤500 lbsBCS2090 / BCS2322
10 ft [3 m]
Heavy

Tay Điều Khiển Feather-Touch<br /> Tay ngang / tay đứng — Feather-Touch Handle
Horizontal / vertical handleBCS2213 / BCS2214
12.4 lbs [5.64 kg]
100 lbs

Tay Điều Khiển Kép (Dual)<br /> Hỗ trợ 2 trọng lượng zero-gravity — Dual Control Handle
Supports 2 zero-gravity weightsBCS2215 / BCS2323
10.2 lbs [4.63 kg]
Dual

Pendant Lên/Xuống Tandem<br /> Ống cuộn / thẳng 10 ft [3 m] — Tandem Up/Down Pendant
Coiled / straight hose 10 ft [3 m]BCS2326 / BCS3330
2 buttons
Tandem

Pendant Lên/Xuống + Manifold Kit<br /> Ống thẳng / xoắn 10 ft [3 m] — Up/Down Pendant + Manifold Kit
Straight / coiled hose 10 ft [3 m]BCS3017 / BCS3320
2 buttons
Standard

Technical Documents

Brochure

Knight Global Air Balancer Catalog (2026)PDF

Manuals & Operating Instructions

Installation & Connection Guides

Manuals in Other Languages

FULL-SHARP AUTOMATIZED VN (FULLSHARP)
Authorized distributor of Knight Global air balancers and lifting equipment in Vietnam
For help selecting the right EX Balancer configuration for your project, please contact a FULLSHARP representative for a quotation and detailed design drawings.