Able Door Spring Company. Est. 1978
“ All orders over £500 get free delivery ”
Products - Transom Spring Units
We have a small selection of products available at trade price, for all parties to purchase. These products are used
by our engineers on a daily basis and therefore we are confident that they are of the highest quality.
We can provide prices for many other items on request contact us.
The prices stated below are non inclusive of VAT.
Transom Spring Units
Dorma RTS 85
This transom spring unit can be used to control the movement of the door whilst not affecting the appearance of the doorway. In our opinion this is the best transom unit available, at present. This unit is available in 3 strengths (same price).
| Length | Height | Depth |
| 323mm | 38mm | 90mm |
Finish: N/A
Strength: EN3, EN4 or EN5 (same price)
Non Handed
Single and Double Action
Adjustable Closing Speed
Back Check
Non-Hold Open (option) or
Hold Open (option)
Final Closing Speed
Back Stop
Cost: There is one cost option available with this product:
- RTS 85 Unit only. Hold Open (option) or Non-hold Open (option). Strength EN3, EN4 or EN5: £70.52
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Groom
These units are now owned by Dorma and will fit in the place of most current transom spring units i.e. Dorma RTS 85, Axim 88, Peter Jackson etc.
| Length | Height | Depth |
| 295mm | 40mm | 94mm |
Finish: N/A
Strength: Universal unit with various strengths
EN2, EN3 or EN4
Non Handed
Single or Double Action
Adjustable Closing Action
Adjustable latching action
Cost:
- Groom Transom Spring Unit: £42.52
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Dorma RTS 85 Dummy Unit Box
Suitable to be used in place of existing Dorma RTS 85, Groom, Axim and Peter Jackson units.
- Cost: £36.85
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Peter Jackson PJ20
This transom unit comes complete with a side load drive arm and bottom bearing assembly. Many units are produced from the original styling of this case.
| Length | Height | Depth |
| 295mm | 38mm | 94mm |
Finish: N/A
Strength: Size 2, Size 3 or Size 4
Non Handed
Single and Double Action
Adjustable Closing Speed
Adjustable Latching Speed
Back Check
Hold Open (option) or
Non-hold Open (option)
Cost: There is one cost option available with this product:
- PJ20 Unit, Side Load Drive Arm and Bottom Bearing Assembly. Hold Open (option) or Non-hold Open (option): £56.25
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Axim 88 Series
These units are widely used throughout the trade, particularly on new installations.
| Length | Height | Depth |
| 295mm | 40mm | 94mm |
Finish: N/A
Strength: Light, Medium or Heavy Duty
Non Handed
Single and Double Action
Adjustable Closing Speed
Adjustable Latching Speed
Back Check
Hold Open (option)
Non-hold Open (option)
Cost: There is one cost option available with this product:
- Unit, Side Load Drive Arm and Bottom Bearing Assembly, Medium Strength Options: Hold Open or Non Hold open: £76.68
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Axim 99 Series
These are a universal unit, due to its dual mounting fixings. This allows the unit to be fitted in place of an Axim 88 or a Dorma RTS 85.
| Length | Height | Depth |
| 295mm | 40mm | 94mm |
Finish: N/A
Strength: Light, Medium or Heavy Duty
Non Handed
Single and Double Action
Adjustable Closing Speed
Adjustable Latching Speed
Back Check
Hold Open (option)
Non-hold Open (option)
Cost: There is one cost option available with this product:
- Unit, Medium Strength. Options: Hold open or Non Hold open: £56.97
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View the Transom Spring Unit Accessories Page.
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Glossary of Terms
Back Check
Hydraulic braking device which cushions the opening of a door i.e. to stop the door hitting a wall.
Single Action
Door opens one way only.
Double Action
Door opens both ways.
Hold Open
Door can be held open.
Non Hold Open
Door cannot be held open.
Strength
The unit strength is determined by the door size, weight, external conditions, degree of opening, use and adjustment of unit.
Non Handed
Suitable for either left or right hand doors.
Handed
Either left handed or right handed.
Adjustable Closing Speed
Speed of door closure can be adjusted.
Adjustable Latching Action
Speed of door can be altered for the last stage of door closure.