Sinolift HD Double Scissor Lift Table
with Coated Fabric Bellow Cover
— Custom Order Case Study
When a customer's application required vertical travel beyond 1,700 mm in a debris-generating metalworking environment, Sinolift's HD Series double scissor electric stationary lift table provided the structural foundation — and a custom coated fabric accordion bellow cover delivered the protection their compliance team demanded. This case study details the configuration, the engineering rationale, and a complete selection guide for buyers evaluating similar requirements.
The Customer Requirement
The customer operates a metalworking and press-feeding line where large assemblies and tooling components weighing up to 1,800 kg must be raised from floor level to a fixed conveyor interface at approximately 1,600 mm — a vertical travel distance that rules out any single-scissor lift table. The facility environment generates continuous metal swarf, grinding dust, and coolant mist, creating two critical risks for any exposed scissor mechanism: accelerated wear of pivot pins and roller assemblies, and personnel contact with the pinch points created by the moving scissor arms.
After evaluating the application, the Sinolift technical team recommended the HD2000 double scissor electric stationary lift table as the base unit, customized with a full-perimeter coated fabric accordion bellow cover to address both the environmental and safety compliance requirements simultaneously.
What Is a Coated Fabric Bellow Cover?
A coated fabric bellow cover — also called a lift table skirt, accordion bellow cover, or scissor lift enclosure — is a flexible, pleated protective shroud that wraps around the full perimeter of a scissor lift table. Made from PVC-coated or polyurethane-coated woven fabric, the cover expands in an accordion-like action as the platform rises and contracts neatly as it lowers, continuously enclosing the scissor mechanism throughout the full travel range.
The accordion bellow cover serves three distinct functions on a high-travel double scissor lift table like the HD Series:
Encloses the scissor arms and hydraulic cylinders throughout the full 1,780 mm travel stroke, preventing personnel from accidentally contacting the mechanism. Complies with EN ISO 14120 and OSHA pinch-point guarding requirements.
Blocks metal chips, grinding dust, coolant mist, and debris from entering the scissor mechanism. Reduces wear on pivot pins, roller assemblies, and hydraulic fittings, extending service intervals and lowering maintenance costs.
High-visibility yellow PVC-coated fabric acts as a passive hazard signal in busy production environments, alerting nearby personnel that the platform is in motion — a recognized best practice in industrial machinery safety design.
Coated fabric bellow covers are manufactured with perimeter mesh vents on opposite faces to allow air to exhaust as the platform descends rapidly, preventing distortion of the accordion pleats. Internal stiffening rods maintain the pleat geometry during operation and prevent the fabric from sagging into the scissor mechanism's path. The cover is secured to the underside of the platform top surface by a perimeter mounting plate with fasteners, allowing removal for maintenance access without tools in some configurations.
Sinolift HD Series: Full Specification Table
The HD Series is Sinolift's double scissor electric stationary lift table, engineered for applications requiring raised heights of 1,780–2,050 mm on a compact platform footprint. All three models — HD1000, HD2000, and HD4000 — are equipped with anti-explosion hydraulic valves that arrest descent immediately upon hose or pipe failure, and comply with EN1570 and ANSI/ASME safety standards. Manufactured to JB/T 9229.1(2/3)-1999 at Sinolift's 50,000 m² facility in Pudong New District, Shanghai.
| Parameter | HD1000 | HD2000 | HD4000 |
|---|---|---|---|
| Scissor Stages | Double | Double | Double |
| Capacity (kg) | 1,000 | 2,000 | 4,000 |
| Platform Size (mm) | 1,300 × 820 | 1,300 × 850 | 1,700 × 1,200 |
| Base Frame Size (mm) | 1,240 × 640 | 1,220 × 785 | 1,600 × 900 |
| Lowered Height (mm) | 305 | 360 | 400 |
| Raised Height (mm) | 1,780 | 1,780 | 2,050 |
| Vertical Travel (mm) | 1,475 | 1,420 | 1,650 |
| Lift Time (s) | 35–45 | 35–45 | 55–65 |
| Power Pack | 380V/50Hz, 2.2 kW | 380V/50Hz, 2.2 kW | 380V/50Hz, 2.2 kW |
| Net Weight (kg) | 210 | 295 | 520 |
| Safety Standard | EN1570 / ANSI/ASME / JB/T 9229.1(2/3)-1999 | ||
| Hydraulic Safety | Anti-explosion valve — immediate arrest on pipe/hose failure | ||
| Installation | Above-floor or in-floor pit mount | ||
Custom HD2000 + Coated Fabric Bellow Cover — Configuration Delta
The following table summarizes the differences between the standard HD2000 base specification and the customer's custom configuration with a coated fabric bellow cover.
| Item | Standard HD2000 | Custom Configuration |
|---|---|---|
| Scissor protection | Open scissor arms (standard) | Full-perimeter coated fabric bellow cover |
| Bellow material | N/A | PVC-coated woven polyester fabric, 22 oz. |
| Bellow color | N/A | High-visibility yellow (standard industrial) |
| Pleat venting | N/A | Perimeter mesh vent panels (opposite faces) |
| Internal stiffening | N/A | Galvanized steel stiffening rods per pleat |
| Mounting method | N/A | Top perimeter plate, bolted to platform underside |
| Pinch-point compliance | EN1570 safety bar only | EN1570 safety bar + EN ISO 14120 bellow enclosure |
| Capacity (kg) | 2,000 (unchanged) | 2,000 (unchanged) |
| Raised height (mm) | 1,780 (unchanged) | 1,780 (unchanged) |
| Power pack | 380V/50Hz, 2.2 kW (unchanged) | 380V/50Hz, 2.2 kW (unchanged) |
Where HD + Bellow Cover Configurations Are Used
The combination of a double scissor stationary lift table with a coated fabric bellow cover addresses a specific cluster of applications where high vertical travel, contamination exclusion, and pinch-point compliance must be satisfied simultaneously. The following scenarios represent the most common deployment environments for this configuration.
Metal swarf, grinding particles, and coolant mist are present at all times. Bellow cover prevents contamination of pivot pins and roller assemblies, significantly reducing unplanned downtime. The HD Series' 1,780–2,050 mm raised height bridges the gap between floor-level die storage and elevated press feed heights.
Where products must be transferred to or from conveyors at heights above 1,400 mm — beyond the reach of standard single-scissor tables — the HD Series delivers the vertical travel required. The bellow cover maintains a clean, debris-free mechanism even under continuous high-cycle operation adjacent to conveyor systems.
In facilities with mezzanine-level storage or multi-tier racking, the HD Series provides a fixed lift point between floor and mezzanine deck. Bellow covers are specified where particulate or moisture ingress from upper levels is a concern, or where the lift operates in a shared-access aisle with forklift and pedestrian traffic.
Body panels, sub-frames, and powertrain assemblies require precise, stable elevation to assembly line height. The bellow cover provides the cleanliness level demanded by automotive quality standards while also satisfying workplace safety compliance requirements for machinery guarding.
Where washdown is required, bellow covers can be specified in food-grade PVC or silicone-coated materials that withstand high-pressure cleaning and resist microbial growth. The HD Series' anti-explosion hydraulic valve and stainless steel platform option (on request) complete the food-grade configuration.
Distribution centers operating the HD Series at 20+ cycles per hour generate significant heat and wear in the scissor mechanism. Bellow covers limit dust and debris accumulation that accelerates roller wear, reducing maintenance intervals and extending the service life of the lift's mechanical components.
How to Choose: HD Series Model & Bellow Configuration
Selecting the right HD model and bellow cover specification requires four decisions in sequence. Working through them systematically eliminates mis-specification and ensures the delivered unit meets both the application's mechanical requirements and its safety compliance obligations.
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Confirm You Need Double Scissor Travel
The HD Series is warranted when the required raised height exceeds approximately 1,400 mm — the practical upper limit of the standard HW single-scissor series. If your interface height is between 990 mm and 1,400 mm, the HIW or HW Series will deliver the required height at lower cost and with a shorter lift cycle time. If the required raised height is above 2,050 mm, the HT Series (triple scissor, up to 3,000 mm) is the correct choice.
Rule of thumb: HD Series for 1,400–2,050 mm interfaces; HT Series for anything above 2,050 mm. -
Select Capacity: HD1000, HD2000, or HD4000
Specify the maximum static load including all fixtures, jigs, containers, and tooling placed on the platform. Then select the model rated at least 20% above that figure. HD1000 covers loads up to approximately 830 kg working load. HD2000 covers loads up to approximately 1,650 kg. HD4000 covers loads up to approximately 3,300 kg. For dynamic or rolling loads — where a loaded vehicle drives onto the platform — consult the Sinolift application team, as dynamic load factors can be 50% or more above the static rating.
Recommendation: always oversize by ≥20% to account for load variability and future process changes. -
Specify the Bellow Cover: Material & Configuration
Standard bellow covers for the HD Series use 22 oz. PVC-coated woven polyester fabric in high-visibility yellow, with internal galvanized steel stiffening rods and perimeter mesh venting. This covers the majority of metalworking, warehousing, and manufacturing applications. For washdown environments (food, pharma), specify silicone-coated fiberglass or food-grade PVC material. For high-temperature environments (near welding or heat treatment), specify silicone-coated fiberglass rated above 200°C. Bellow covers for the HD Series are custom-dimensioned to match the specific platform size and full travel stroke of the model ordered.
For standard industrial applications: 22 oz. yellow PVC-coated fabric is the correct specification. For washdown: heat-welded PVC or silicone-coated fiberglass. -
Confirm Installation Method & Pit Requirements
The HD Series can be installed above-floor or pit-mounted. If pit-mounted, the platform sits flush with the surrounding floor at its lowered position (305–400 mm), allowing forklift loading from floor level. Note that bellow covers are fully compatible with pit-mounted installations — the cover simply compresses into the pit recess as the platform descends. If above-floor installation is used, confirm that the lowered height of 305–400 mm is acceptable for your loading method; if a hand pallet jack must load the table, the HU, HE, or HY Series (85–105 mm lowered height) is more appropriate than the HD Series.
Pit mounting + HD Series + bellow cover = the highest-specification stationary lift platform configuration for regulated industrial environments.
Related Sinolift Stationary Lift Platform Series
If the HD Series does not match your application's height, capacity, or platform entry requirements, the following Sinolift series cover the full range of stationary lift table needs. All series are available from the same manufacturing facility and carry the same EN1570, ANSI/ASME, and ISO 9001 certification portfolio.
Standard electric lift table. Consistent 1,300 × 800 mm platform across all capacities. Above-floor or pit-mount. Best for general workstations and dock interfacing.
Heavy-duty double-beam horizontal scissor. Wide platform range. Best for die handling, large-pallet positioning, and manufacturing assembly with heavy or uneven loads.
Double scissor. This case study product. Ideal for elevated conveyor, mezzanine loading, and any application requiring 1,400–2,050 mm raised height. Available with bellow cover.
Triple scissor. Maximum raised height in the Sinolift stationary lineup. For multi-level logistics bridges, high-bay interfaces, and applications above 2,050 mm. Also compatible with bellow covers.
U-shape and E-shape low-profile platforms. 85 mm minimum closed height enables direct hand pallet jack loading with no pit or ramp. Best for no-pit ground-level access.
Low-profile closed deck. 85 mm lowered height with short ramp-on entry. No pit required. Ideal for warehouse retrofits and facilities where floor excavation is not feasible.
Frequently Asked Questions
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What is a coated fabric bellow cover on a scissor lift table?
A coated fabric bellow cover (also called a lift table skirt or accordion bellow cover) is a flexible, pleated protective enclosure made from PVC-coated or polyurethane-coated fabric that wraps around the perimeter of a scissor lift table. It expands and contracts in an accordion-like action as the platform rises and lowers, continuously enclosing the scissor arms and hydraulic components to exclude dust and debris and to prevent personnel from contacting the pinch points created by the moving scissor mechanism. On the HD Series with its 1,780 mm travel stroke, the bellow cover is particularly important because the large exposed scissor mechanism area presents both a contamination ingress risk and a significant pinch-point hazard zone.
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Why add a bellow cover to the Sinolift HD double scissor lift table specifically?
The HD Series reaches a maximum raised height of 1,780–2,050 mm, creating an exposed scissor mechanism spanning a much larger vertical zone than a standard single-scissor table. At this travel range, the unenclosed scissor arms present significant pinch-point risks to nearby personnel and expose hydraulic cylinders, pivot pins, and roller assemblies to airborne dust, metal chips, and debris. A coated fabric bellow cover addresses both hazards simultaneously: it complies with EN ISO 14120 machinery guarding requirements and extends equipment service intervals by preventing contamination from entering the scissor mechanism. Standard single-scissor tables reaching 990–1,020 mm carry lower risk from both hazards due to the shorter exposed mechanism height.
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Which Sinolift lift table series can be fitted with a bellow cover?
Bellow covers are most commonly specified for the HD Series (double scissor, up to 2,050 mm) and HT Series (triple scissor, up to 3,000 mm) because their extended travel height creates the largest exposed scissor mechanism area. Standard single-scissor series including the HIW, HW, HU, HE, and HY can also be fitted with bellow covers on request. Contact the Sinolift application team to specify bellow cover dimensions, material grade, color, and mounting method for any series and model.
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What is the difference between the HD Series and the HT Series?
Both series use multiple scissor stages to achieve greater vertical travel than a single-scissor table, but they differ in the number of stages and the resulting travel range: the HD Series uses two scissor stages (double scissor) to reach a maximum raised height of 1,780–2,050 mm, available in 1,000 kg, 2,000 kg, and 4,000 kg capacities. The HT Series uses three scissor stages (triple scissor) to reach a maximum raised height of 3,000 mm, available in 1,000 kg and 2,000 kg capacities. Both series are compatible with coated fabric bellow covers and comply with EN1570 and ANSI/ASME. Choose HD when 1,400–2,050 mm is sufficient; choose HT when the interface height exceeds 2,050 mm.
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What bellow cover materials are available for different environments?
The standard bellow cover material for the HD Series is 22 oz. PVC-coated woven polyester fabric in high-visibility yellow, suitable for most metalworking, warehousing, and manufacturing environments up to approximately 70°C. For washdown environments (food processing, pharmaceutical), heat-welded PVC or food-grade silicone-coated materials are specified. For high-temperature environments near welding stations or heat treatment equipment, silicone-coated fiberglass rated above 200°C is available. For environments with significant oil or chemical exposure, polyurethane-coated fabric offers superior chemical resistance. Contact the Sinolift team with your specific environmental conditions to confirm the correct material specification.
Enquire about the HD Series with Coated Fabric Bellow Cover — or explore the full Sinolift stationary lift platform range