Description
HMI Brass Cable Gland 25mm (1″) – Single & Double Compression
The HMI Brass Cable Gland 25mm (1″) is an industrial cable-entry solution available in Single Compression and Double Compression configurations. HMI identifies the Single Compression version as SC025 – 25mm (1″) and the Double Compression version as DC025 – 25mm (1″). The manufacturer’s published specifications identify nickel-plated brass construction and BSC (British Standard Conduit) entry thread for these ranges.
This product is useful for electrical contractors, panel builders, EPC companies, maintenance teams and industrial procurement departments that require a 25mm (1″) HMI cable gland but need to select between Single and Double Compression according to the cable construction.
The important point is that 25mm (1″) is the HMI gland-size designation and should not automatically be treated as the cable’s actual outside diameter. The cable OD, construction, armour, enclosure entry and thread must be checked before ordering.
For a broader selection methodology, see our Cable Gland Supplier India: 15 Expert Tips to Choose the Right Cable Gland. The guide explains why cable OD, armour type, thread, environmental conditions and IP requirements should all be considered when selecting a gland.
What Does 25mm (1″) Mean on an HMI Cable Gland?
A common purchasing mistake is assuming:
25mm Cable Gland = 25mm Cable Diameter
That is not necessarily correct.
The 25mm (1″) designation identifies the HMI gland size. It does not by itself establish the cable’s acceptable outside-diameter range.
The gland must be matched to the manufacturer’s applicable dimensions and the actual cable being installed.
For example, cables with the same conductor cross-section can have different overall diameters because of:
- Number of cores
- Insulation thickness
- Cable construction
- Armour
- Bedding
- Outer sheath
- Manufacturer design
Thunderbolt’s cable-gland sizing guidance similarly recommends checking the actual cable OD rather than selecting a gland solely from conductor size.
HMI 25mm Single Compression Cable Gland
The HMI Single Compression Cable Gland 25mm (1″) is identified by HMI as SC025.
HMI describes its Single Compression Cable Gland range as suitable for indoor or outdoor applications involving armoured or unarmoured cables. Its stated function is to grip the cable’s outer sheath. HMI lists nickel-plated brass as the material and BSC as the entry thread.
This configuration can be selected where the installation specification calls for a Single Compression gland.
Before ordering, verify:
- Cable type
- Cable outside diameter
- Armoured or unarmoured construction
- Enclosure entry
- Thread requirement
- Environmental conditions
- Required sealing/IP specification
- Quantity
Do not select it simply because the cable is described as a “25mm cable.”
HMI 25mm Double Compression Cable Gland
The HMI Double Compression Cable Gland 25mm (1″) is identified by HMI as DC025.
HMI specifies this Double Compression range for armoured cables. Its stated function is to seal and grip the cable’s inner and outer sheath, while the cone and ring clamp the armour. HMI lists nickel-plated brass construction and BSC entry thread.
This makes the Double Compression version particularly relevant when the installation involves a suitable armoured cable and the project specification calls for a Double Compression gland.
Single Compression vs Double Compression Comparison
HMI 25mm (1″) Single Compression
| Specification | Details |
| Brand | HMI |
| Product Type | Single Compression Cable Gland |
| HMI Code | SC025 |
| Nominal Size | 25mm |
| Inch Equivalent | 1″ |
| Material | Nickel-Plated Brass |
| Entry Thread | BSC |
| Cable Application | Armoured / Unarmoured, subject to specification |
| Function | Grips outer cable sheath |
| Installation | Indoor / Outdoor |
| Accessories | Earth Tag and Shroud available on request |
| Selection Check | Cable OD, construction, thread and application |
HMI’s published specifications confirm SC025 = 25mm (1″), nickel-plated brass, BSC thread and suitability for armoured/unarmoured cable applications.
HMI 25mm (1″) Double Compression
| Specification | Details |
| Brand | HMI |
| Product Type | Double Compression Cable Gland |
| HMI Code | DC025 |
| Nominal Size | 25mm |
| Inch Equivalent | 1″ |
| Material | Nickel-Plated Brass |
| Entry Thread | BSC |
| Cable Application | Armoured cables |
| Function | Seals inner & outer sheath and clamps armour |
| Armour Clamping | Cone & Ring |
| Installation | Indoor / Outdoor |
| Accessories | Earth Tag, Shroud, Stop Plug, Reducer/Adaptor available on request |
| Selection Check | Cable OD, armour dimensions, thread and application |
HMI’s published Double Compression specifications confirm DC025 = 25mm (1″) and describe the inner/outer sheath sealing and cone-and-ring armour-clamping arrangement.
How to Choose the Correct HMI 25mm Cable Gland
1. Identify the Cable Construction
First establish whether the cable is:
- Armoured
- Unarmoured
- Multicore
- Power cable
- Control cable
- Instrumentation cable
- Industrial cable
This helps determine whether Single Compression or Double Compression is appropriate.
2. Measure the Actual Cable OD
Do not select the gland using conductor size alone.
Measure the complete outside diameter of the finished cable or obtain the OD from the cable manufacturer’s datasheet.
Thunderbolt’s sizing guide specifically highlights cable OD as a critical selection factor and explains that incorrect sealing range can cause cable movement and IP-protection problems.
3. Select Single or Double Compression
For HMI:
Single Compression — SC025
Suitable for specified armoured/unarmoured applications and grips the outer sheath.
Double Compression — DC025
Designed for specified armoured cable applications, with the cone and ring clamping the armour.
4. Check the Thread
HMI specifies BSC (British Standard Conduit) entry thread for these published ranges.
The enclosure or equipment entry must be compatible with the gland thread.
Never assume that Metric, BSC, PG, BSP or NPT threads are interchangeable.
5. Consider the Environment
Check whether the gland will be installed:
- Indoors
- Outdoors
- In dusty areas
- In wet areas
- In high-vibration equipment
- In chemical/process environments
- In areas requiring a specified IP rating
Thunderbolt’s IP Rating on Cable Glands guide explains how cable size, gland type, thread and environmental protection should be considered together.
Applications
The HMI 25mm Cable Gland can be considered for suitable cable-entry requirements in:
- Electrical panels
- Control panels
- Junction boxes
- Industrial enclosures
- MCC/PCC panels
- Switchgear
- Automation equipment
- Manufacturing machinery
- Power distribution equipment
- Industrial control systems
- Electrical maintenance projects
- EPC installations
- Infrastructure projects
The exact suitability depends on the cable, gland configuration, enclosure and project specification.
Why Choose Thunderbolt Electromech India Pvt. Ltd. for Cable Glands?
A cable gland is a relatively small component, but selecting the wrong one can create installation problems such as poor sealing, cable movement, incorrect thread engagement or inadequate mechanical retention.
Thunderbolt Electromech India Pvt. Ltd. supplies industrial cable glands for electrical contractors, panel builders, EPC companies, OEMs, maintenance departments and industrial procurement teams.
Thunderbolt’s Cable Gland range includes HMI, Dowells, Comet, Diamond and MIC, giving customers options across different project requirements. The company’s Cable Gland pillar also emphasizes technical selection based on cable OD, armour, thread, material and environmental requirements.
Why source HMI Cable Glands from Thunderbolt?
- HMI cable-gland range
- Single Compression options
- Double Compression options
- Multiple sizes
- Brass cable-gland options
- Technical selection assistance
- Bulk industrial order support
- Project procurement support
- Pan-India supply
- Multiple cable-accessory categories
For an enquiry, provide:
HMI + 25mm (1″) + Single/Double Compression + Cable OD + Cable Construction + Thread + Quantity
This gives the supplier substantially more useful information than simply saying “I need a 25mm cable gland.”
FAQ
1. What is an HMI 25mm (1″) Cable Gland?
It is an HMI cable gland in the manufacturer’s 25mm (1″) size range. HMI identifies the Single Compression version as SC025 and the Double Compression version as DC025.
2. What is the difference between HMI 25mm Single and Double Compression Cable Glands?
The Single Compression gland grips the cable’s outer sheath and HMI lists it for suitable armoured and unarmoured cable applications. The Double Compression gland is intended for armoured cables and uses a cone and ring to clamp the armour while sealing the inner and outer sheath.
3. Is HMI DC025 suitable for armoured cable?
Yes. HMI identifies DC025 – 25mm (1″) in its Double Compression range, which it describes as suitable for armoured cables.
4. Can HMI SC025 be used for an unarmoured cable?
HMI describes its Single Compression range as suitable for armoured and unarmoured cables. However, the actual cable dimensions and installation specification must match the applicable gland requirements.
5. Does a 25mm cable gland fit a 25mm diameter cable?
Not necessarily. 25mm is the gland-size designation, not a guarantee that the gland accepts a 25mm cable OD. Always compare the actual cable OD with the manufacturer’s applicable dimensional/sealing range.
6. Can I select an HMI 25mm cable gland according to cable sq.mm?
No. Cable conductor size alone is not enough. You should also check the complete cable OD, cable construction, armour and installation requirements. Thunderbolt’s sizing guide specifically recommends checking the actual cable OD.
7. What thread does the HMI 25mm Cable Gland have?
HMI’s published Single and Double Compression ranges specify BSC (British Standard Conduit) entry thread. Confirm the exact product specification and enclosure requirement before ordering.
8. What material is the HMI 25mm Cable Gland made from?
HMI specifies nickel-plated brass for its Single Compression and Double Compression cable-gland ranges.
9. Is the HMI 25mm Double Compression gland better than Single Compression?
“Better” depends on the installation. The Double Compression configuration is specifically intended for suitable armoured-cable applications and provides an armour-clamping arrangement. A Single Compression gland may be the correct choice where the cable and project specification call for it. The correct gland is the one that matches the cable and installation requirement—not automatically the more elaborate design.
10. Can the HMI 25mm Cable Gland be used outdoors?
HMI describes both its Single and Double Compression ranges as suitable for indoor or outdoor cable-gland applications. However, the required environmental/IP performance should be verified for the exact installation and product specification.
11. How do I know if the HMI 25mm gland will fit my cable?
Check:
- Cable outside diameter
- Cable construction
- Armour dimensions, if applicable
- Single or Double Compression requirement
- Thread
- Enclosure entry
- Environmental/IP requirement
Do not order solely from the cable conductor size.
12. How should I order the HMI 25mm Cable Gland from Thunderbolt?
Give the supplier:
HMI + 25mm (1″) + Single/Double Compression + Cable OD + Armoured/Unarmoured + Thread + Quantity
This minimizes the risk of receiving an unsuitable variant.
Reviews
There are no reviews yet.