Iver Osaka door hardware buying guide
Osaka is the clean, rounded lever in the Iver range: a smooth brass lever with a gentle line and a close projection, made for a modern house that wants a quiet, refined handle. It comes on a round rose, a rectangular backplate and an oval backplate, in passage, privacy and entrance kits, with an inbuilt privacy version. This guide covers the door parts only. It sets out the kits, the sizes that decide fit, the finishes and coatings, and how to choose and fit an Osaka set. The brand overview is on Iver, the door ranges are compared on Iver door hardware, and the matching cabinet pulls are on Iver Osaka cabinet handle.
What the Osaka looks like
The Osaka lever has a smooth, slightly rounded line with no sharp edges, so it feels soft in the hand and reads as understated on the door. It projects less than most of the other Iver levers, which keeps it close to the door and makes it a good choice where space beside the door is tight. It is made in solid brass, so it has a solid weight, and the finishes run from warm brass tones to cool satin nickel and matte black.
The plates change the look. A round rose is 52mm across and leaves most of the door face clear. A rectangular backplate is 240mm long and 38mm wide, and an oval backplate has the same length with softer ends and is 40mm wide. A rounded lever on an oval plate is the softest combination, and the same lever on a rectangular plate reads as a little more contemporary.
The kits
Every kit is complete, with the latch or lock, the fixings and the instructions. There are four kit types.
The passage kit latches the door with no lock, and suits hallways, living areas and laundries. The privacy kit with a privacy turn adds a small turn on the inside so the door can be locked from within, for bathrooms, toilets and bedrooms. The inbuilt privacy version places the locking mechanism within the rose, so there is no separate turn, and the lever is 136mm long. The entrance kit locks with a key. It uses a euro mortice lock with a 60mm backset, a key and thumb turn, and two keys in the box, and it comes on a backplate with the lock built in, or on a round rose with a separate high security lock.
For sets by function, see passage door handles, privacy door handles and entry door lock sets.
Sizes that decide fit
Every Osaka kit suits doors 35 to 60mm thick, which covers most internal doors and many external ones. The backset is 60mm, the usual size on interior doors, so most replacements fit the existing hole. The kits use 85mm centre to centre spacing, which suits standard door preparations for euro and privacy locks, and the backplate fixing centres are 205mm.
The lever on a round rose is 136mm long and projects 55mm, and on a backplate it projects 52mm, which is the closest of the Iver door levers. That matters beside a wall, a cabinet or a narrow hallway, since a handle that projects 52mm needs less clear room than one that projects 61mm. A stop is still a sensible addition where the handle could meet the wall. See door stops.
On a panelled door, check the plate length against the stile. A 240mm backplate needs a clear run of that length, so measure the stile and the distance to the first moulding before you order. On a narrow stile, choose the round rose.
Tie bolts and fixing
Osaka kits are fixed with tie bolts, long bolts that pass through the door and pull the two sides of the handle together so the lever does not rock. Tie bolts are supplied to suit 55mm thick doors. The screws are solid brass, which lets the finish match as closely as possible and avoids rust in coastal areas. Brass screws are soft, so drill a pilot hole and finish the last turns by hand, and check that the bolts reach through a door thicker than 55mm.
Finishes and coatings
The Osaka is made in brushed brass, matte black, satin nickel and signature brass. Brushed brass and signature brass are warm tones, satin nickel is cool, and matte black is neutral and suits most colours. The brass and nickel pieces are lacquered. A lacquered finish should be wiped with a soft damp cloth and never scoured, since scouring wears the lacquer, and a brushed finish hides fingerprints better than a polished one.
Signature brass suits timber, cream paint and period colours. Satin nickel sits well with stainless steel and chrome tapware. Matte black works with most colours and suits hinges and frames. See brushed brass, matte black and brushed nickel for the wider choice in those finishes.
Choosing a plate
The plate decides how the handle looks on the door. A round rose leaves the door face open and suits a panelled door or a narrow stile. A rectangular backplate hides the lock area and gives a strong vertical line. An oval backplate softens the line and suits a door where the other details are curved. On an entrance kit, the backplate keeps the lever and the lock together on one plate, and the round rose entrance kit puts the lock on a separate item, which can look cleaner on a narrow door.
Reading the product names
The names follow a pattern. In Iver Osaka Lever Rectangular Backplate Privacy Kit with Privacy Turn Satin Nickel, the range is Osaka, the handle is a lever, the plate is a rectangular backplate, the kit is a privacy kit with a separate turn, and the finish is satin nickel. A name with Entrance Kit with High Security Lock on a backplate means the lock is on the plate, and a name with Separate High Security Lock means the lock is a separate item. A name with Inbuilt Privacy means the lock sits within the rose.
The inbuilt privacy kit
The inbuilt privacy kit puts the lock button inside the rose, so the door carries only the lever and a single plate. Choose it for a bathroom or bedroom where a clean plate matters. Choose the separate turn where you want to see at a glance whether the door is locked, or where small children need a release that is easy to find. Test the release from outside the day the lock is fitted, and keep the release tool where the household can reach it.
The round rose entrance kit with a separate lock
The round rose entrance kit pairs the Osaka lever with a separate high security lock, so the lever and the lock work independently. The lever is 136mm long and projects 55mm. The lock is a euro mortice lock with a key and thumb turn, a 60mm backset and two keys in the box. Because the lock is set apart from the lever, the door carries a lever on a small round rose and a separate lock above or below it, which is a tidy arrangement on a front door with a narrow stile. Mark the lock position with a level, cut the mortice pocket, and fit the lock before the lever.
Key and thumb turn
The entrance kits use a key and thumb turn cylinder. The key locks and unlocks the door from outside, and the thumb turn locks and unlocks it from inside, so anyone in the house can leave without a key. This is the usual choice for a front door and for most family homes, because the door can always be opened from inside in an emergency. Two keys come in the box, and extra keys can be cut from them. If the door has glass close to the thumb turn, a person outside could break the glass and reach the turn, so check the door before you choose.
Doors the Osaka suits
The Osaka suits flat and panelled doors in timber, MDF and painted finishes. Its soft line and close projection suit narrow hallways, apartments and any house where doors open close to walls. The range suits doors 35 to 60mm thick, and if a door is thicker than 55mm the tie bolts need to reach through it. On an external door, use the entrance kits and choose the finish with the exposure in mind: a covered porch is gentle on a lacquered finish, while a door that takes full weather wears faster.
Setting out a door
Fit the latch first, then the spindle and the levers, then the plates. Check that the lever returns to level when released, since a lever that droops usually means a loose fixing. For an entrance set, cut the mortice pocket to the size of the lock body, fit the euro cylinder, and test the bolt from both sides before you close the job. A mortice lock needs more careful setting out than a tubular latch, so a joiner is the safe choice for a door that is already hung. For a privacy kit, fit the turn on the inside of the room and test the release from outside.
Planning a house room by room
List every door against its function before you order. The front door takes an entrance kit. Hallways, living areas, laundries and pantries take passage kits. Bedrooms, bathrooms and toilets take privacy kits. Write the door thickness beside each entry, and note any door that differs from the rest. Choose one plate style, one finish and one range, and order every set together so the finish agrees, since a kit bought months later can differ slightly in tone from the first batch.
The usual handle height is about 900 to 1100mm above the floor, and about 1050mm is common on new doors. In a hallway with several doors, set every lever at the same height and fit every privacy kit with its turn on the same side, so the run reads as one set.
Replacing existing hardware
Take off the old handle and check the spindle hole, the screw holes and the backset. A backplate hides old paint lines and screw marks, and a round rose leaves them showing, so decide before you fit. If the old lock was a mortice lock, an Osaka entrance kit goes back into the same pocket, and a tubular latch kit does not. Photograph the old handle from both sides, and keep the old parts until the new set is fitted. Check the door thickness at the latch and the diameter of the hole in the door face, and if the old latch is worn, replace it while the handle is off. If the door has dropped at the latch edge, fix the hinges first, since a sagging door makes any handle feel loose.
Retrofit checks
Before you order for an existing door, check four things. The thickness of the door at the latch. The backset of the old latch, measured from the door edge to the centre of the spindle hole. The diameter of the hole in the face of the door. Whether the old latch is still in good order, since a worn latch is worth replacing while the handle is off. If all four agree with the Osaka numbers, the set swaps in, and the old marks are the only thing to touch up. If the existing hole is a different size, check the specification before you drill, since a larger hole leaves a gap around the rose.
Apartments and narrow hallways
The close projection of the Osaka makes it a practical choice where space is tight. In an apartment hallway, doors often open close to walls, built-in wardrobes and each other, and a lever that projects 52mm leaves more room than one that projects 61mm. The soft, rounded end also means there is no sharp corner to catch on clothing or bags as you pass. If a door still meets a wall when it opens, a stop at handle height is the simplest fix, and the finish should match the lever.
Setting out a run of doors
In a hallway with several doors, consistency matters more than any single choice. Set every lever at the same height, use the same plate style and finish, and fit every privacy kit with its turn on the same side. A row of doors with handles at slightly different heights is noticeable, so mark the height once with a tape and a level, and carry it along the wall. A dummy handle on a cupboard should be set at the same height as its neighbours.
Passage, privacy or nothing
Every internal door needs one of three things: free passage, privacy, or no latch at all. A passage kit is for doors that are never locked. A privacy kit is for doors that need to be locked from inside, and it must always have a release that works from outside. A door that needs no latch, such as a cupboard door, is better with a plain pull or knob, so choose from the cabinet range if you want it to match. See dummy levers for dummy options in other ranges.
Matching the cabinets
If the kitchen or bathroom joinery uses Osaka pulls, order them in the same finish as the door handles. The Osaka cabinet pulls come in sizes from 96mm up to long pulls for pantry doors, so a whole house can share one design. See Iver cabinet hardware and cabinet handles.
Care
Wipe the levers with a soft damp cloth and dry them. Keep abrasive pads, polishes and acidic or bleach-based cleaners away from the finish. Tighten the fixings once a year, since timber moves with the seasons, and if a latch sticks, a drop of light oil on the latch tongue will free it. Lacquered brass will darken a little with handling, and a brushed finish hides fingerprints better than a polished one.
Questions people ask
Does the Osaka come with a latch? Yes. Every kit includes its own latch or lock, the fixings and the instructions.
How does the Osaka differ from the Helsinki? Both use the same plates and the same fit numbers. The Osaka has a rounder line and a closer projection, and the Helsinki is a straighter lever with a longer reach. Compare the two side by side if the shape matters.
Can the Osaka go on an external door? The entrance kits are made for front and rear doors, and the finish should be chosen with the exposure in mind.
Which plate suits a narrow door? The round rose, since it takes the least room on the stile.
Can I mix Osaka levers with other Iver ranges? Mixing ranges in one house works only if the finish is the same, and the shapes should be similar in length, since different lever lengths are noticeable on doors side by side.
