Designed to support medium-weight tools and equipment in repetitive assembly, production, and service applications, the Ingersoll Rand BMDS-4 Medium Duty Spring Balancer provides an adjustable 4.4–8.8 lbs load capacity and 6.5 ft lift. Its short-cable configuration is suited to workstations where tools or fixtures travel through a relatively limited vertical range. The spring-balancer design creates a “gravity-free” effect that allows supported tools to be moved with minimal effort along the cable travel.
The BMDS-4 features a cast aluminum body, stainless-steel cable, adjustable capacity, an adjustable stroke-limiting device, and an anti-friction cable guide. A safety device helps prevent load dropping due to spring breakage on models above the BMDS-2, and the BMDS-4 includes an upper suspension shackle for ease of installation. The 6.5 ft lift makes this short-cable model suitable for assembly stations and other applications requiring single-load balancing within its rated capacity.
Type: Medium Duty Spring Balancer | Series: BMD Series | Model: BMDS-4 | Configuration: Short Cable | Load Capacity: 4.4–8.8 lbs | Lift: 6.5 ft | Housing Material: Cast Aluminum | Cable Material: Stainless Steel | Balancer Weight: 4.4 lbs
Features:
- Medium-duty spring-balancer design provides a gravity-free effect that helps operators move supported tools with minimal effort.
- Adjustable capacity accommodates supported loads within the specified 4.4–8.8 lbs range.
- 6.5 ft lift provides controlled vertical travel for tools and equipment.
- Short-cable configuration is suited to workstations requiring a compact vertical operating range.
- Cast aluminum body provides the specified housing construction.
- Stainless-steel cable provides the specified cable construction.
- Adjustable stroke-limiting device allows the available cable travel to be controlled.
- Anti-friction cable guide helps guide the cable during extension and retraction.
- Safety device helps prevent the load from dropping in the event of spring breakage.
- Upper suspension shackle is included for ease of installation.
Made in Italy: 
Applications:
- Assembly stations where one tool is used repeatedly within a limited area of motion.
- Production workstations requiring single-load balancing for compatible tools and fixtures.
- Automotive and equipment service applications using supported tools within the 4.4–8.8 lbs capacity range.
- Maintenance workstations where controlled vertical tool movement can reduce the effort required to reposition equipment.
- Applications involving weld guns, assembly fixtures, and other compatible equipment requiring overhead balancing.
FAQs:
- Q: What is the load capacity of the BMDS-4?
A: The BMDS-4 has an adjustable load capacity of 4.4–8.8 lbs. - Q: How much lift does the BMDS-4 provide?
A: The BMDS-4 provides 6.5 ft of vertical cable travel. - Q: What does short cable mean on the BMDS-4?
A: Short cable identifies the BMDS-4 configuration within the BMD Series. This model provides 6.5 ft of lift, compared with the longer-cable models that provide greater vertical travel. - Q: What materials are used in the BMDS-4?
A: The balancer uses a cast aluminum body and stainless-steel cable. - Q: Does the BMDS-4 have a spring-break safety device?
A: Yes. The manufacturer specifies a safety device against load dropping due to spring breakage for the BMDS Series, with the BMDS-2 identified as the exception. - Q: Is the load capacity adjustable?
A: Yes. The BMDS-4 has adjustable capacity within its specified 4.4–8.8 lbs operating range.
| SKU | Capacity lb (kg) |
Weight lb (kg) |
Lift ft (mm) |
NPT in |
CFM |
|---|---|---|---|---|---|
| Medium Duty | |||||
| BMDS-2 | 2.2 - 5.5 (1 - 2.5) | 4.4 (2.0) | 6.5 (2,000) | - | - |
| BMDS-4 | 4.4 - 8.8 (2 - 4) | 4.4 (2.0) | 6.5 (2,000) | - | - |
| BMDS-6 | 8.8 - 13.2 (4 - 6) | 5.1 (2.3) | 6.5 (2,000) | - | - |
| BMDS-8 | 13.2 - 17.6 (6 - 8) | 5.5 (2.5) | 6.5 (2,000) | - | - |
| BMDLN-4 | 4.4 - 6.6 (2 - 3) | 1.5 (0.7) | 6.5 (2,000) | - | - |
| BMDLN-6 | 8.8 - 13.2 (4 - 6) | 7.1 (3.2) | 8.2 (2,500) | - | - |
| BMDLN-8 | 13.2 - 17.6 (6 - 8) | 7.7 (3.5) | 8.2 (2,500) | - | - |
| BMDLN-10 | 17.6 - 22 (8 - 10) | 8.2 (3.7) | 8.2 (2,500) | - | - |
| BMDLN-12 | 22 - 30 (10 - 13.6) | 8.8 (4.0) | 8.2 (2,500) | - | - |
| BMDLLN-4 | 4.4 - 8.8 (2 - 4) | 6.6 (3.0) | 8.2 (2,500) | - | - |
| BMDLLN-6 | 8.8 - 13.2 (4 - 6) | 7.3 (3.3) | 8.2 (2,500) | - | - |
| BMDLLN-8 | 13.2 - 17.6 (6 - 8) | 7.9 (3.6) | 8.2 (2,500) | - | - |
| BMDLLN-10 | 17.6 - 22.0 (8 - 10) | 8.4 (3.8) | 8.2’ (2500) | - | - |
For help selecting the correct Ingersoll Rand Spring Balancers for your assembly application, call (800) 608-5210 or email info@intlairtool.com
warning WARNING: This or other products sold on this website may expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
