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FAQ Content

AR15 80% Lower – Milling Trigger Hole and Sandblasting.
The final step in milling out the 80% AR15 lower receiver is milling out the hole for the trigger. When using a lower quality drill press make sure the end mill bit is tight in the drill chuck. Some people have had an end mill bit come loose while milling out the 80% AR15 lower receiver and it resulted in a destroyed AR1r lower receiver. Make sure that end mill bit is secure in the drill chuck. Also use plenty of lubricant when milling out the 80% AR15 lower receiver. I used automatic transmission fluid for cutting oil for milling the 80% AR15 lower receiver. The jig for milling this 80% AR15 lower receiver is ‘the Original Blue Jig’ and is a high quality jig for milling the 80% AR15 lower receiver. After the milling process was complete on the 80% AR15 lower receiver, the now completed and fully functional AR15 receiver was chemically cleaned and degreased of the milling oil. I then lightly sandblasted the completed and fully functional AR15 receiver with play sand at 80 to 90 psi with a $20 sandblaster. You only need to make the bare AR15 rough enough so that whatever coating you use will adhere well to the gun part. The next step will be to immerse the AR15 lower receiver in a degreaser and blow dry the gun part. The part will need to be handled with latex gloves so that no oils contaminate the gun part before it is coated. The gun coating I will use is DuraCoat, which is a 2 part epoxy and is one of the better gun (firearms) coatings. It was obvious, after sandblasting, that the amateur milling work on the 80% AR15 lower receiver was high quality and accurate. You can’t go wrong milling an 80% AR15 lower receiver when you take your time and use the ‘Original Blue Jig’.

Episode 74 ~ Polyco Multi-Task Gloves

During the second half of 2016, a new version of EN388, the mechanical hazards standard for protective gloves will be published.

One of the key changes to the standard is that it will now include back of the hand protection and it should make it easier to identify which gloves offer which level of protection.

In this video Roger Bisby and Skill Builder Editor, Georgina Bisby, discuss the changes in more detail and look at some gloves from Polyco which meet the new standard: the new Multi-Task E (Hi-Viz), Grip It Oil C5 TP, or Multi-Task E C5.

These products all feature a layer of thermoplastic rubber (TPR) applied to the back of the gloves that has been engineered to guard against injuries caused by impact. Later this year, a new version of EN388 – the mechanical hazards standard – will be published, which will, for the first time, cover back-of-hand protection. From 21 April 2018, new impact-resistant gloves will have to pass specific tests in order to comply with the standard.

Impact tests measure the amount of force transmitted to the hand after a blow to the back of it. To be effective in preventing injury, impact protection must be able both to divert the force of the impact and slow it down. The flexible TPR applied to the back of the Multi-Task E™ (Hi-Viz), Grip It Oil C5 TP and Multi-Task E C5 is soft, which means it deflects the force of the blow away from the hand without compromising dexterity. The engineered rubber is strong and durable and will not break down over time, unlike foam or gel. It is also lightweight, which helps alleviate hand fatigue over long periods of wear.

All three new gloves feature a tensile nitrile palm coating, designed to enhance protection and freedom of movement. In the Multi-Task E (Hi-Viz) and Multi-Task E C5 this coating has been slightly roughened to improve handling performance, particularly in light oil conditions. The former also boasts a high visibility lining and TPR, padding on key areas of the palm and a reinforced thumb crotch for extra defence against injury.

The Grip It Oil C5 TP comprises two layers of nitrile coating – a full, water-resistant layer and a second layer on the palm incorporating microfoam bubbles, which maximises grip in wet and greasy conditions. The soft, seamless liner in all three gloves is made from knitted nylon and, in the case of the Grip It Oil C5 TP and Multi-Task E C5™, it is cut-resistant. Both the latter and the Multi-Task E (Hi-Viz) have an elasticated neoprene cuff with an adjustable VELCRO wrist strap, which adds to their wearability and durability.

The gloves are suitable for use in a wide range of general handling activities and work environments, including automotive maintenance and repair, construction, light engineering and machine operation.

Find out more at http://www.skill-builder.uk

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