ISC D4 Descender
ISC D4 Descender
The D4 Descender features a unique and innovative progressive cam action, which offers precise control at slow or fast speed. The device 'fails to safe' (the device locks if the handle is released) and also has a panic brake feature (if the handle is pulled down in panic when in freefall then it locks the device - The progressive cam design means that this panic brake is not overly sensitive in normal use).
The device is made from a high grade aluminium and has a stainless steel cam, axles and top bobbin which should ensure a good degree of longevity. The beauty is that the internal workings are cleanable.
Fast Delivery
Deliveries
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We pride ourselves on our excellent service and aim to despatch all orders promptly. If you order before 3pm Monday to Friday we will try to send it out that day, for next working day delivery. Orders:
- placed after 3pm Monday to Thursday will be processed the next day
- placed after 3pm on a Friday or at a weekend or on a Bank Holiday will be processed on the next working day
- Orders to the Highlands, Islands and Out of Area may be a two-day delivery and overseas will be longer
Please call us for time-critical orders, so we can process the order as a matter of urgency and confirm the delivery schedule.
All goods are subject to availability. If we can't supply your goods within 30 days from the date of order, we will inform you immediately and let you know the expected delivery date.
Courier service
If you opt for a courier delivery, you will receive an email or text on the day we despatch your order, informing you that it is enroute. On the morning of delivery, at around 07:30, you will receive a further email or text giving you a 1-hour delivery time slot. Please therefore ensure that you have given us the correct mobile number and email address.
Couriers are extremely busy during Christmas and the sales, so please allow extra time.
We will not be held liable for any consequential loss caused by late or failed deliveries.
Timed deliveries / Saturday & Sunday deliveries
We can arrange timed deliveries for:
Weekdays:
- pre-10:30am
- pre-12 (midday)
Weekends:
- Saturday pre-10:30am
- Saturday pre-12 (midday)
- Sunday (anytime)
Some of the timed delivery options are available via the website, for others including a Sunday delivery, please call the office for a confirmed price and to arrange the alternate delivery.
Important Note:
Timed deliveries are subject to stock availability (we will contact you if any of your order is not in stock, so you can confirm if you would like us to split the delivery) and must be placed by 3pm Monday to Friday. Please call us if it's after 3pm as we may still be able to catch our couriers.
Description
ISC D4 Descender
The D4 Descender features a unique and innovative progressive cam action, which offers precise control at slow or fast speed. The device 'fails to safe' (the device locks if the handle is released) and also has a panic brake feature (if the handle is pulled down in panic when in freefall then it locks the device - The progressive cam design means that this panic brake is not overly sensitive in normal use).
The device is made from a high grade aluminium and has a stainless steel cam, axles and top bobbin which should ensure a good degree of longevity. The beauty is that the internal workings are cleanable.
The D4's other selling points are that it is rated to 240kg and does not require extra friction to operate at the top end of its range.
Operationally the D4 has a smooth rope run through the device and when the user is not in full suspension, such as if working on an incline (like an embankment), the design allows the cam to be squeezed open using your thumb to allow rope to feed through gently (no need to operate the handle).
Finally, the D4 works well in a belay mode as well as when put into a system such as a Z rig.
Suitable for low stretch ropes (EN1891) 10.5 -11.5mm.
FAQ's
Does the EN12841: 2006/C 100m (60kg - 240kg) shown on the front of the device mean it can only be used on ropes up to 100m?
No, the device can be used on any length of rope. The marking shows that the device was tested on a 100m length of rope and the minimum and maximum weights used were 60kg and 240kg.
Manufacturer's Downloads
Specification
Descender
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Device Functions
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Anti Panic Function
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Rope Compatibility
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10.5mm to 11mm
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Maximum Working Load (kg)
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240kg
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Breaking Strength kN
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16kN
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General
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Industrial or Sport Use
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Industrial
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Material
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Aluminium
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Colour
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Red
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Conformity
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ANSI Z359
CE EN12841
NFPA (1983)
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Dimensions
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200mm x 83mm x 80mm
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Weight (g)
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678g
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