GMK Supply "Hole Thing" - Metric Shock Piston Drill Set
About this part
Reviews3.0 · 20 reviews
Hi Scott - Thanks for purchasing one of my drill sets, and for taking the time to write a review. The pin vise included in the set includes two collets, and each collet has two ends with different clamping ranges - so a total of four collet sizes are included. Between those four sizes, every drill bit in the set can be gripped. The second collet is stored under the swivel on the other end of the pin vise - you may not have realized it was there. Note - To submit this review, the software requires me to make a rating. I wouldn't ever just come on and rate my own products highly - I just wanted to see if I could help Scott out with the issue he raised. Gary - GMK Supply
well? they were not bad? but they where off in sizes by quiet a bit, as a Machinist for 35+ years you get to know the sizes :) the 1.3, 1.35 1.4 and 1.5 sizes were considerably off being 1.3 and the 1.35 was "Same Size" as the 1.3 was 1.33!?, the 1.4 was a 1.37 and 1.5 was a 1.56 (chinese knock offs?) would have returned? however!! thinking GMK did there JOB "Correctly" i had guessed? i would not need to check? the return window had passed? but when came to use? they were off? saddly? i had to buy the same bits at Local Machine supply store. which buying a whole set of ones made "Correctly" were Less in price! "Lesson Learned!!" which if getting such items? would recommend just going to local Machine supply shops when you know the drill bits will be the "Correct Sizes" and "DEAD ON correct size!!, so getting my 1.3 it "WAS" 1.3 and my 1.35 "WAS" 1.35 etc. etc. and was Measured with Mitutoyo Tooling both digital and Veneer. so for the price? they should have been "SPOT ON" but were not? or at least? the set i Purchased?? and the Pin vice? seen a few reviews on how it was not working? the Pin vice was "Ok'ish" it "Worked" not great? but it worked? has collets need for the bits, "However"---it is cheap, slips baddly and wont hold bits per the size for collet for bit used, and often a wrench and Pliers are needed to "Crank the Holder" to hold said bit, so useless in the Feild "IF"!! you do not have extra "TOOLS" for the tool?? so makes no sense? again? at least for the "Set I Purchased" maybe there better now???? getting a pin vice from Mitutoyo, Starrett, Woodriver, even Tamiya!! be better and less in the Long run. but best would be get a better one on say Amazon? or best yet, local Machine supply shop, and get a "Superior One" be bout 3.00 more? or so? but like any tool, will be much better. again? i just thought "Eh? buy as whole set? its "Cheap" keep in RC tool case and no need to bring GOOD ONES i use to track?" again Lesson learned!!, it was "CHEAP" not Inexpensive! "CHEAPLY Made" i should have got off my Duff!! and purchased a Superior extra set from local Machine shop.
I do not recommend this set,drills are not accurate on diameters.my 1.35 is .049 should be .053 ,my 1.4 is .050 should be .055.
Very nice set bits a very sharp and strong. There are two different adapter collects stored in the handle that have four sizes one on each end of the collect to fit all the drill bit size. Handle has a solid feel with a rotating top cap that help when applying pressure to cut thru your materiel. The bit must be lock in with the tightening nut very tight or the bit could slide down into the collect. I would recommend this product I like it and it got the job done well and very precise.
Gary Kosits is right end of conversion!....................................... Buy it, rate it 5******
Reviewers are sharply divided on this metric shock piston drill set. Many praise the drill bits as sharp, strong and clean-cutting, and several note the included case is useful. Multiple reviewers report that bit sizes are inaccurate, with some bits measuring off by 0.01 to 0.1mm and some sizes missing or duplicated. A recurring complaint is the pin vise: some reviewers say none of the collets fit the in-between sizes, while others say the second collet is stored under the swivel and works once the collet is manually widened. Several reviewers say the handle differs from the pictured product. The manufacturer posted a review defending the kit, which several reviewers considered unhelpful. Positive reviewers say the kit works well once the collet location is understood.
- + Sharp, strong drill bits that cut cleanly
- + Useful storage case and pouch
- + Second collet in handle covers in-between sizes
- + Works well for piston drilling once set up
- − Bit diameters often inaccurate or mislabelled
- − Some sizes missing or duplicated in the set
- − Pin vise collets fail to fit some sizes and grip poorly
- − Handle differs from pictured product